Modifing the Q Cooling System

[Q45CAL]

I would like to put a larger radiator in my q45. There was a article about a featured Q45 on Q45.org. But it was removed. The radiator was replaced with one that was larger. Also I belive that a slightly larger fan was put in with a temp switch. just wondered if anyone had imput. I would like the read about that mod. again.

[AZhitman]

Welcome to NICO!

http://www.nicoclub.com/featuredrides.shtml

[maxnix]

Q45tech is running a custom Griffin radiator that accomodates an extra quart of coolant.

Sijoko has replaced his viscous clutch fan with one or two electric. Any gains not measured, far as I recall.

[elwesso]

I would like to put a larger radiator in my q45. There was a article about a featured Q45 on Q45.org. But it was removed. The radiator was replaced with one that was larger. Also I belive that a slightly larger fan was put in with a temp switch. just wondered if anyone had imput. I would like the read about that mod. again.

Yeah. heres the link..

http://www.nicoclub.com/rideofmonthjune.shtml

[PoorManQ45]

Has anyone tried adding another radiator to their Q45? Run in seires with the main radiator. You could put a small one, or two, infront of the main one

[AZhitman]

*sigh*

Shhh, Brien. The menfolk are discussing feasible improvements.

[PoorManQ45]

you don't think another radiator would be an improvement?

I'd be like having to transmission coolers in series.

[AZhitman]

Not if one were in front of the other.

Please - We have a new person asking a legit question, let's not muck it up by educating you on how radiators work. Please? OK. Thanks.

[elwesso]

you don't think another radiator would be an improvement?

I'd be like having to transmission coolers in series.

which would be equally useless!!

[maxnix]

*sigh*

Shhh, Brien. The menfolk are discussing feasible improvements.

Mmmmmfff....ffmpmmmffffm...fkkkkkkpppm.

[Q45CAL]

you guys are funny. Thanks for the link AZ & Wes. I beleive my car has been over heating. I notice when I open the hood that anitfreeze is spattered over the front of the engine. I thought is was the seal on the radaitor cap so I replaced it but is is still building up a great omout of pressure becaus the fluid is still seaping out. Maybe i need a new therostat. I love my car and know I still have some replacement to make....

I am not that car savvy on the tech side but I do stay on the posts. I have a 1994 q blk 130,000. So far I have changed: Upper & Lower control arms (factory) the bushings where bad. Set of Tokicyo blues - sp ; Fuel Pump Fuel filter and a replacement gas tank courtesy of Pep Boys-idiots they punched a hole in my original; Tune up w/ NGKs new pci valve; the Infinity dealership steamed the intake manifold for me-flushed the transmission and engine and replaced with synthetic and Lucas; also replaced the diff oil in was low when we checked; stainless steel brake lines; replaced the egr and erg solenoid; did the knock sensors my self (thanks Wes for the article) although it was a absolutely painful experience and I ended up flooding the engine and i started panicking...I had to take the car to Infinity where they changed the oil and made some minor readjusting. Funny the master tech actually took a liking to my car and commented on how he noticed how I have made alot of repairs. lets see is that it... ooh new set of Wagner brakes and two high flow cats. with a flow master muffler, new k/n cone ( i broke the heat sheild) whew.. I think thats it.

Next mods:Complete engine tune. - $4200Lowering SpringsRadiator and Fan upgradeBrake upgrade

I know what I know about this car because of you guys I would like to thank you all at NICO this site is the best!!!!!!
Modified by Q45CAL at 10:22 AM 9/12/2005

[96Qowner]

I beleive my car has been over heating. I notice when I open the hood that anitfreeze is spattered over the front of the engine. I thought is was the seal on the radaitor cap so I replaced it but is is still building up a great omout of pressure becaus the fluid is still seaping out.

Have you thoroughly checked your engine hoses? At 130,000 miles, they would be due.

[Q45CAL]

Have you thoroughly checked your engine hoses? At 130,000 miles, they would be due.

Thought to do that I just have not yet. I was told it will cost aroung 300 to 400 hundred for all the hoses. But I just had a mechanic tell me that he thinks I have blown the head gasket. I think I need to lay down!!!!

[PoorManQ45]

Thought to do that I just have not yet. I was told it will cost aroung 300 to 400 hundred for all the hoses. But I just had a mechanic tell me that he thinks I have blown the head gasket. I think I need to lay down!!!!

Pff... $300~$400 . I did it for $50

Blown headgasket ehh? Coolant in the oil? Compression tested?

[Q45CAL]

Pff... $300~$400 . I did it for $50

Blown headgasket ehh? Coolant in the oil? Compression tested?

there is no coolant in the oil. matter of fact just had a oil change this weekend. I have never had the compression tested. how did you do this for $50 dollars. I all most passed out a min ago. I guess I need a chart of all the hoses so I can get them from arch or something please enlighten me?

ooh an kudos pmq on the enclosure thats sexy. I would be a customer but need 2. I have Audio Bahn Immortal subs 12s...but thats another conv.

Modified by Q45CAL at 12:53 PM 9/12/2005
Modified by Q45CAL at 12:58 PM 9/12/2005

[PoorManQ45]

there is no coolant in the oil. matter of fact just had a oil change this weekend. I have never had the compression tested. how did you do this for $50 dollars. I all most passed out a min ago. I guess I need a chart of all the hoses so I can get them from arch or something please enlighten me?

I did all the hose replacement "custom". Meaning I went to a comercial hose supplier(for big rigs), and got a few feet of the required sizes of hose that I needed. I found that for 90 degree turns I could use brass elbows. IIRC the fuel line is 5/16s, I went through a bit of that, the coolant hose on the "Y" I don't know what those sizes were, I just took it to the hose supplier and had them give me 6in of each size.

ANyways, everything was done with high temperature hoses with a heat sheild braiding.

ooh an kudos pmq on the enclosure thats sexy. I would be a customer but need 2. I have Audio Bahn Immortal subs 12s...but thats another conv.

Post in the enclosure thread if you're interested. Would you want them both in a single enclosure, or one on each side(preferable)?

[Q451990]

how did you do this for $50 dollars.

Couldn't find the exact thread, but I think the words "garden hose" appeared in multiple posts

Heath

[Jeff Williams]

you guys are funny. Thanks for the link AZ & Wes. I beleive my car has been over heating. I notice when I open the hood that anitfreeze is spattered over the front of the engine. I thought is was the seal on the radaitor cap so I replaced it but is is still building up a great omout of pressure becaus the fluid is still seaping out. Maybe i need a new therostat. I love my car and know I still have some replacement to make....

I am not that car savvy on the tech side but I do stay on the posts. I have a 1994 q blk 130,000. So far I have changed: Upper & Lower control arms (factory) the bushings where bad. Set of Tokicyo blues - sp ; Fuel Pump Fuel filter and a replacement gas tank courtesy of Pep Boys-idiots they punched a hole in my original; Tune up w/ NGKs new pci valve; the Infinity dealership steamed the intake manifold for me-flushed the transmission and engine and replaced with synthetic and Lucas; also replaced the diff oil in was low when we checked; stainless steel brake lines; replaced the egr and erg solenoid; did the knock sensors my self (thanks Wes for the article) although it was a absolutely painful experience and I ended up flooding the engine and i started panicking...I had to take the car to Infinity where they changed the oil and made some minor readjusting. Funny the master tech actually took a liking to my car and commented on how he noticed how I have made alot of repairs. lets see is that it... ooh new set of Wagner brakes and two high flow cats. with a flow master muffler, new k/n cone ( i broke the heat sheild) whew.. I think thats it.

Next mods:Complete engine tune. - $4200Lowering SpringsRadiator and Fan upgradeBrake upgrade

I know what I know about this car because of you guys I would like to thank you all at NICO this site is the best!!!!!!

Whew!!! I am tired, just from reading this post. You have done a lot! I had the same experience with Layla on the coolant splashing out of the cap. I put a new cap on , and it seemed to help. Since then I have replaced all the hoses and belts ($300.00 - I had no time to do it myself ) I haven't driven it much, but there is no leakage now. I kinda thought it was the thermostat closing a little fast after a long hot drive, and over pressurizing the filler cap.

How can you spend $4,200 for a complete engine tune?

Get in on Wes' California Spring purchase!

[texasoil]

I have never heard of a Q45 overheating if the OEM radiator was not plugged-internally or externally.Some antifreeze will react with some water and when a certain 'age' is reached, the solution will precipitate out LOTS of white solid crud that clogs up evey cool surface inside the radiator. Simple cleaner will not remove it. Its an alumino-silicate-carbonate mineral deposit. Get a new radiator from radiators.com <$200 delivered tomorrow and drive cool.

[maxnix]

.... the Infinity dealership steamed the intake manifold for me-flushed the transmission and engine and replaced with synthetic and Lucas; ....

ooh new set of Wagner brakes and two high flow cats. with a flow master muffler, new k/n cone ( i broke the heat sheild) whew..

Next mods:Complete engine tune. - $4200

Well, you need to go back (or better go somewhere else) and get the transmission chemically and mechanically flushed again with a BG shop. There is nothing from Lucas that will not harm the internals.

Wagners? Better start saving for OEM soon. Hope they were OEM catalytic converters, else ditto. Hope you saved the stock CAI so you can ditch the K&N ASAP and return to OEM!

Fro not much more than $4,200 you could have the engine replaced with a refurbished one at T-3.

Do some more reading so all your steps are forward, not both forward and backward. You have the right attitude and motivation, just a little short on the research.

[PoorManQ45]

Couldn't find the exact thread, but I think the words "garden hose" appeared in multiple posts

Heath

Bahahahha, I don't think I said that though. Others were saying stupid crap about how it wouldn't work.

[Q45CAL]

Well, you need to go back (or better go somewhere else) and get the transmission chemically and mechanically flushed again with a BG shop. There is nothing from Lucas that will not harm the internals.

Wagners? Better start saving for OEM soon. Hope they were OEM catalytic converters, else ditto. Hope you saved the stock CAI so you can ditch the K&N ASAP and return to OEM!

Fro not much more than $4,200 you could have the engine replaced with a refurbished one at T-3.

Do some more reading so all your steps are forward, not both forward and backward. You have the right attitude and motivation, just a little short on the research.

Understand if you have something to say that is based on you specific intrest on mantaining your car thats fine I dont mind hearing about it.

However who told you that I want OEM brakes or OEM cats. You must have told your self that!!!!!!!! As for the K&N I am happy for now thats what matters.

And...for that matter why would I spend more money to get the transmission flushed and treated when it was done at Infifnity?

Also the price given to me was on the high side 4,200 but so you all know that is to port and polish the heads and also upgrade the intake (and if there is any valve isssues they will take care of them) I have confidence in the person doing the job as I have seen what he did with another Q45 and the price is now 3,700.

Hey but thanks for the feed back. Pictures coming soon.

[Q45CAL]

Well the 4,200 was to port an

Whew!!! I am tired, just from reading this post. You have done a lot! I had the same experience with Layla on the coolant splashing out of the cap. I put a new cap on , and it seemed to help. Since then I have replaced all the hoses and belts ($300.00 - I had no time to do it myself ) I haven't driven it much, but there is no leakage now. I kinda thought it was the thermostat closing a little fast after a long hot drive, and over pressurizing the filler cap.

How can you spend $4,200 for a complete engine tune?

Get in on Wes' California Spring purchase!

Well thank for the advice I tried that unfortuantly the coolant just squeezed is self out again. So yesterday I took of work and put on a new water pump and thermostat. I am proud to say that there is no more spilage. My baby is happy again.

Well the 4,200 was to port and polish the heads given that the bottom side of the engine is ok. (valve damage) My new price is 3,700. The last Q45 the mechanice did is a complete monster. Matter of fact I was talking to the owner last week- after he left rubber and smoke all over the avenue... that he fish tails from start unless the tracton control is on!thats with no ecu or tcu upgrade and no gear swap...NA.

Jeff I am a fan of black cars I just got to tell you Lola is sssooo sexy!

Yes- just waiting on Wes for instructions.

[PoorManQ45]

He didn't mean to offend you.

However who told you that I want OEM brakes or OEM cats. You must have told your self that!!!!!!!! As for the K&N I am happy for now thats what matters.

I won't comment on the OEM brakes, but I personally would have gone with 300zx or skyline rotors/calipers on the front, and J30 rotors/calipers on the rear. The reason for this is that parts are cheap, and stopping power is greatly improved.

As for the Cats, the OEM cats are a high flow design, AND they are built to last 100K+ miles, whereas most aftermarket high flow cats have been found to last about 20k~30k

Also the price given to me was on the high side 4,200 but so you all know that is to port and polish the heads and also upgrade the intake (and if there is any valve isssues they will take care of them) I have confidence in the person doing the job as I have seen what he did with another Q45 and the price is now 3,700.

Actually I don't think any of us understood that that is what you meant. The way you said it I was thinking just a standard tune up. What you're talking about isn't a tune up, it's a full out head/intake modification. I personally would work a little more on the exhaust side then the intake. Rework the valves, and changer the manifolds out for headers. This should get you between 15~30hp. As for the intake, I don't think there is that much to be gained. Infinity employed equal length long runners to maximize power over the entire rpm range. You may be able to get a little power by porting/polishing the intake side too though.

So, go for it. Tell us how it turns out

[Q45CAL]

He didn't mean to offend you.

I won't comment on the OEM brakes, but I personally would have gone with 300zx or skyline rotors/calipers on the front, and J30 rotors/calipers on the rear. The reason for this is that parts are cheap, and stopping power is greatly improved.

Yes I have been researching that. I was actually looking on ebay for skyline rotors and calipers last week. The thing i was alittle fuzy on was about the lines and exactly what I would need for the swap.

As for the Cats, the OEM cats are a high flow design, AND they are built to last 100K+ miles, whereas most aftermarket high flow cats have been found to last about 20k~30k

Well the Cats I had were so clogged that I would have to purchase new ones.

Actually I don't think any of us understood that that is what you meant. The way you said it I was thinking just a standard tune up. What you're talking about isn't a tune up, it's a full out head/intake modification. I personally would work a little more on the exhaust side then the intake. Rework the valves, and changer the manifolds out for headers. This should get you between 15~30hp. As for the intake, I don't think there is that much to be gained. Infinity employed equal length long runners to maximize power over the entire rpm range. You may be able to get a little power by porting/polishing the intake side too though.

So, go for it. Tell us how it turns out

Yes I realised that. You know I actually got that from the mechanic that may do the job for me. Because he refers to the G50 engine as a detuned indy engine that by was not manufactured to breath properly or to its full potential.

Intresting. Maybe I need to reconsider that PMQ. But beast that I saw after the port an polish was out of control. I mean tires spinning from first and not a the little screach.

[elwesso]

I say go for it!! LET us konw how it comes out!

[PoorManQ45]

Because he refers to the G50 engine as a detuned indy engine that by was not manufactured to breath properly or to its full potential.

Nah, Infiniti did indeed make an engine to run in Indy(3.5l i believe), it I don't think it was related to the VH45DE in any other way then the fact that they both wore the infiniti logo

Intresting. Maybe I need to reconsider that PMQ. But beast that I saw after the port an polish was out of control. I mean tires spinning from first and not a the little screach.

Hmm, where'd you see this? He may have had a 4.08 rear end swap also.

You might be able to find a bit of power if you rework the intake runners a bit. But if you shorten them I believe that will give you a slight boost in power down low, but a drop off up high. So it's a trade off.

Have you seen the supercharger project that elwesso is working on? They need someone to be the first one so they can finish fabrication. I believe the buy in is lke $1k up front and a total around $3k~$4k.

Power estimate is about 350~400rwhp at 4~6psi.

Might want to look into that rather then trying to squeeze what little power is left in the heads out of it.