New engine. 94 q45t

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GRADEST
Posts: 14
Joined: Tue May 17, 2005 2:46 pm

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I bought a 94 q45t in jan of this year and 1 mo. later it developed a head gasket leak. My coolant looked like chocolate milk. It started using as much water as gas. Weird thing is, i never had water in my oil? As a testament to the vh45de I ran it like this for 10,000 miles. I tryed to blow it up, it wouldnt give. I overheated to where it started to run bad and make all kind of clattering noises like at least 10 times. When it cooled off i added water, and went on my way. No prob. I ran it without a thermostat so it had good water flow. The oil in the water would gel when it cooled blocking flow on warm up. The car would still do 135 with one bad injector. there was oil leaking out of every gasket on the thing. So, 165000 miles on a mess of an engine, and i still put another 10000 on it.

I picked up a 40000mile us spec motor from a salvage co. called greenleaf for 1100.00 here in LV, NV. I installed the new engine in the car 2 weeks ago. It took about three days or thirty six hours with all hand tools(no air). It was challenging with no lift to use. I did a combination of jacking up the front of the car, then lowering the motor/transmission combo with a cherry picker and actually set the combo on the hoist's legs to roll it out the front of the car. The salvage co said it was a 94 but it had a different crank pulley with only a 4 rib where the P.S. / water pump belt goes. Mine has a six rib pulley for the P.S/ water pump belt location. I used that handy sears puller, a chain wrench, and a three foot breaker bar to do the swap. The biggest challenge was all the little clips and retainers that are brittle and wiring harnesses that are time consuming to remove. I love the new engine and this car is incredible. I would recommend to anyone to just swap in the low mileage engine and just be done with all the headache. With the price of parts and down time it doesnt make sense to drop the motor or do major repairs to this car. I would like to add this IS NOT a novice mechanics job. You need to be extremly meticulous and have extreme patience. to be 110 percent succesful. I would like to thank all the people on this forum for being involved and sharing knowledge of this car. And a special thanks to ELWESSO @ q45.org for helping me with a shop manual and his personal time for an advise phonecall. My next mission is a remote mount turbo. A company called squires turbo in utah does them. Check it out. That is unless somebody makes a supercharger KIT first!



911/Q45
Posts: 1376
Joined: Tue Jul 23, 2002 12:10 pm
Car: 1990 Infiniti Q45
1996 Porsche Turbo

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I'm impressed!

Heath
Posts: 232
Joined: Wed Oct 15, 2003 11:29 am
Car: 1992 Q45, 2000 Excursion (towrig), 2003 Yukon Denali (Wife's Ride)

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Why remote mount? I've talked with some of the mucle car guys around here that build some beasts and some are impressed with them (the Squire one in particular) but they do raise some concerns about all that heat under the car... More than anything my question is what about a puddle or something like that... Hot metal and cold water don't play well together...

Heath
Posts: 232
Joined: Wed Oct 15, 2003 11:29 am
Car: 1992 Q45, 2000 Excursion (towrig), 2003 Yukon Denali (Wife's Ride)

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Oh and good job on the swap... Not something I'd ever look forward to doing on this car... Not nearly as easy as on my old Hondas...

maxnix
Posts: 22627
Joined: Mon Jul 22, 2002 8:11 pm
Car: 1995 Infiniti Q45
1995 Infiniti Q45t
2000 Infiniti Q45

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Pretty impressive.

But remote turbo? I don't think so, unless you are running it at the strip only.
Modified by maxnix at 9:43 AM 9/27/2005

911/Q45
Posts: 1376
Joined: Tue Jul 23, 2002 12:10 pm
Car: 1990 Infiniti Q45
1996 Porsche Turbo

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Heath wrote: More than anything my question is what about a puddle or something like that... Hot metal and cold water don't play well together...
My other car has factory twin turbos right behind the rear tires and it's not a problem.

GRADEST
Posts: 14
Joined: Tue May 17, 2005 2:46 pm

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The remote mount has some differences that make it work in a remote location. It makes power as well as a traditional setup and the turbo runs about 500deg. cooler. You should check it out.

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dsagers
Posts: 751
Joined: Tue Oct 21, 2003 10:09 am

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Called STS last week about the remote turbo, read all of the magazine articles, and even talked to their recommended dealer/installer.

Seems the biggest challenges are finding an electric oil pump, and sizing the turbo.

One magazine article said they estimated a 25% drop in exhaust velocity when sizing the turbo, but never gave anymore details.

Anyone on here know where to find an electric oil pump, or how to size a remote turbo?

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elwesso
Posts: 30810
Joined: Sun Feb 23, 2003 4:52 pm
Car: 94 Infiniti Q45t 5 spd
2007 BMW M Coupe
2007 Infiniti G35 S 6MT
Location: Indiana
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Good job on the engine swap.. It is quite a job, especially getting the car up high enough that you can pull the engine out....

I agree with you, if your engine is in iffy condition, buy yourself a used takeout, fix it up real nice and dont worry about it. its like having a new car!

maxnix
Posts: 22627
Joined: Mon Jul 22, 2002 8:11 pm
Car: 1995 Infiniti Q45
1995 Infiniti Q45t
2000 Infiniti Q45

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GRADEST wrote: The remote mount has some differences that make it work in a remote location. It makes power as well as a traditional setup and the turbo runs about 500deg. cooler. You should check it out.
Yeah sure, but physics being what they are, there will be a "I should have mailed it yesterday" lag time when it is so far from both the header and the intake. Does compressible gas column mean anything to you? It sure does to me!

I always wonder how does one turbo work on a dual bank V8? Not very well, I suspect.

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Jeff Williams
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Joined: Fri Aug 02, 2002 4:17 am
Car: 1994 Infiniti Q45t
2000 Infiniti I30t
2004 Infiniti M45
71, 72, 73, 82 & 2000 Corvettes
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Just mount them where the rear view mirrors are. Lots of nice cold air there, and you can mount cameras to them, to feed your DVD navigation system to replace the mirrors. Nothing like a couple of huge K&N filters right by the A-pillar!

sean8564
Posts: 3735
Joined: Mon Dec 27, 2004 1:08 pm
Car: 1993 Nissan GT-R V-Spec
1991 Nissan 300ZX TT Black
1993 Nissan Silvia
1990 Nissan 240SX Coupe RB25DET

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well very impressive

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Jeff Williams
Posts: 3394
Joined: Fri Aug 02, 2002 4:17 am
Car: 1994 Infiniti Q45t
2000 Infiniti I30t
2004 Infiniti M45
71, 72, 73, 82 & 2000 Corvettes
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GRADEST wrote:It was challenging with no lift to use. I did a combination of jacking up the front of the car, then lowering the motor/transmission combo with a cherry picker and actually set the combo on the hoist's legs to roll it out the front of the car.
I would love to have seen some pics of that process!

Congrats on the swap.

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Q45CALIBER
Posts: 237
Joined: Sat Jun 05, 2004 9:11 am
Car: Black on Black 94 Q45

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I think that is very intresting a Turbo Q45. Yeah Baby....Do It Do It Do It!!!

Has this be attempted? I was on squires website they claim their application runs cooler and has no lag.

With the Q having the gas tank in the trunk there would not be a question of that thing heating the gas in the tank.



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