Rb25 Cooling problems. need help ASAP!!

[Nissan2367]

So no one can confirm what standard RB25 temp should be?

[USMCgetsome]

http://www.rhdjapan.com/jdm-lo...13251

170-185. It will flux up and down due to the thermostat. But you go over 185 no bueno!
Modified by KUILLIN_DRIFTER at 1:16 PM 3/8/2009

[rb25det250sx]

yeah idk... i'll have darius come down sometime this week hopefully and help me out... cuz it sounds like he knows what he talkin bout... and he knows more than me so it will be a good idea..

I was reading a earlier thread about a guys turbo getting so hot it got orange.. thats what mine does. stumped, stumped, stumped, I HAVE NO IDEA WHAT TO DO... Heres the thread. zer...t-why

[USMCgetsome]

Ok homie. There are quite a few reasons that could happen. Timing/af mixture/poor oiling. This will also bring up coolant temps. I think your issues isn't coolant!

[rb25det250sx]

well i know now that it dont stop at coolant, but is still part of the problem.. i dont know. i got serious problems and just need to know what would be the best thing to do..

[USMCgetsome]

this thread just turned in to WORTHLESS. Make a new thread about your engine issues and we'll all start again. This is just a part of the problem.

[Carl H]

sounds like its still on the rb thermal transmitter.

[mattleegee]

when installing a water temp meter you put the sensor in the top or lower radiator hose?

[mott6904]

Yeah this guy is ridiculous. He give me s*** becuase i ask if he setup his fans right. Then he wants us to diagnose his car over the internet and leaves out vitial information

[Nissan2367]

Top hose is hot out into rad so temp sensor into that hose

[rb25det250sx]

okay.. Carl whats the rb thermal transmitter... sounds like its just the temp sensor, but not sure.

how can i put the water temp meter in a radiator hose.. they're rubber and i would poke a hole in it..

MOTT... im not retarded. i just need help on why my car is overheating, and why my turbo gets so hot. I may only be 17 when u guys are older, but i still know how to set up fans its not hard.

[USMCgetsome]

ok bro just take the flamage. Heres what u want to do. If using the stock wiring and stock s13 water temp display u need to use the stock ka temp sending unit. If you use the rb unit with s13 display it will not work properly.

If you want to use a water temp sender from a aftermarket water temp meter u need one of these.

http://cgi.ebay.com/ebaymotors..._1337

wow 17! that one hell of a head start for engine projects. I hate to say this bro but i don't think your gonna have enough experience on how to fix the issues u stated above. Your gonna need a buddy that has good knowledge about engines and troubleshooting skills. Search around the forum for someone in your area with an rb and start begging him to come and hang out.

[mattleegee]

ok bro just take the flamage. Heres what u want to do. If using the stock wiring and stock s13 water temp display u need to use the stock ka temp sending unit. If you use the rb unit with s13 display it will not work properly.

Is there any wire changes in this procedure? Or just PnPI was thinking of just getting a gauge for in car but if PnP that would be less work

yeah drill a hole in your radiator hose for the water temp sending unit

[rb25det250sx]

yeah.. 17 and i do know alot about cars as i said above im not retarded a do wirk as a mechanic at a shop in my town.. and i found someone that lives close to me but he hasnt been on to recieve my posts.

i've been around cars all my life, my friend has a 87 supra wit a 7m-gte, and were gonna do a 2jz swap. and our team did a full engine build on a 2nd gen talon..

Yeah our team check it out at.. http://www.ttownracing.com

[Darius]

Dude, take that website down LOL! It screams "COPS PLEASE VISIT THIS SITE FOR STREET RACING TIMES AND LOCATIONS!" Plus, you live less than an hour away from three drag strips!

Drop me a line and let me know if you still want help this week.

[rb25det250sx]

haha..um dude eddyville and cedar falls are dragstrips.. those arent street races man... those are midnight drags at strips, ... but yeah ima need some help dude for real... what you doing tommorrow about 330?? would be greatly appriciated. and lol i guess i can get u a 24 pack if u really want one.. or you can call/text me at (641)481-0193.

[USMCgetsome]

no sir just use the blue with black stipe wire to the stock ka sender. Should already be hooked up to the dash harness.

[Darius]

what you doing tommorrow about 330??

I will be at work. I'll give you a call after 5 tomorrow and hopefully get you pointed in the right direction.

[rb25det250sx]

alright that sounds good.. i think am going to drain the oil, and change that to seem if that makes a difference with turbo tempatures to..

[mott6904]

MOTT... im not retarded. i just need help on why my car is overheating, and why my turbo gets so hot. I may only be 17 when u guys are older, but i still know how to set up fans its not hard.

By no means was I calling you retarded, but you would be supprised what stupid s*** people do to cars and then come on here and ask us to fix it for them. I dont think age has anything to do with working on cars. I tackled my rb swap 6 years ago when i was 16 for a school project. The funny thing is everyone in my town was doing sr swaps then and i had no help. It just takes time to get these engines to run right.

Back to your problem( i work on cars all day long and dont remember what you have tried) since you are having overheating problems and your turbo is getting red hot then check your ignition timing and cam timing to make sure the belt hasnt jumped.

[Darius]

I've been coaching the young jedi and he is checking the timing tonight. He said the CAS was most of the way to one side, so I'm guessing it wasn't timed right in the first place.

The only other thing I can think of is that the ebay fans can't pull enough air thru the radiator.

[rb25det250sx]

nice.. young jedi thanks.. anyways timing is not all that hard.. didnt get the change to set it though because now i have a missfire.. WOW i know right. there was anitfreeze in where thr coil packs are but i cleaned it out with a rag then blew the rest out with a blower lol. but still missfire. tommorrow im going to take the plugs out and check them and what not see if i can figure it out. oh and i know timing affects the firing patter or whatever, but if i revved the motor up then let it idle it would come out of it for a few seconds then start missfiring again.

[USMCgetsome]

if you had coolant in there i'd start with removing the boot from the coil packs and cleaning and then stretching the spring that hits the spark plug. Also clean the inside of the coil where the spring sits. Then after that clean your ground to your coil packs. it's right off the coil pack harness. Mucho important. I'd also check voltage of the coils at idle.

[rb25det250sx]

oh.. yeah will do. cant work on it tonight didnt go to school.. will check it out 2morrow and see what i can do.. will report bac 2morrow to let everyone know whats going on.. thanks for all the help...

[mott6904]

Hey dude did you get the cooling problem fixed?

[rb25hatch]

whats the chemical that checks to see if the h/g is blown

[Darius]

Hey dude did you get the cooling problem fixed?

We fixed the timing. The belt stretched and skipped a tooth. Changed the timing belt, retensioned it with a new tensioner and reset the base timing to 15*. Works like a charm now. It actually exposed a grounding coil or two, so coating them solved that issue as well.

I don't think there are any more cooling problems either. We added a higher ratio of water to the system

[Kansei240sx]

If you have anymore heating problems, then you're probably going to need to pull the engine out, remove the head and vat the block. RB motors or any JDM motor thats been sitting around long enough to get rust build up or leftover mineral deposits in the coolant jacket. I've seen some so bad, and get so hard it completely blocks off 3-4 coolant jackets in various places.

[mott6904]

man he got lucky it didnt jump more than that or break. glad to hear its fixed

[Fibre guy]

What Kansei240sx said, rust in journals bad stuff had to have the inside of my block wire brushed then dipped. The worst right behind the water pump.