Elmo2003 Posted November 6, 2009 Share Posted November 6, 2009 hey there guys i kw that this is nt an old school car but i am having big problems with my rb25det skyline overheating it is pretty much stock apart from frnt mount intercooler and an electric fan running as soon as the key gets turned on any help would be great cheers Daniel Quote Link to comment Share on other sites More sharing options...
Brock-Lee Posted November 6, 2009 Share Posted November 6, 2009 does the fan have a shroud, because shrouds rule so hard. Quote Link to comment Share on other sites More sharing options...
My name is Russell Posted November 6, 2009 Share Posted November 6, 2009 this any help? http://forums.nicoclub.com/zerothread/357473 Quote Link to comment Share on other sites More sharing options...
My name is Russell Posted November 6, 2009 Share Posted November 6, 2009 shroud, radiator cap, blockage Quote Link to comment Share on other sites More sharing options...
Elmo2003 Posted November 6, 2009 Author Share Posted November 6, 2009 i have been all thru the nico website but nothng on there is helping me i have yet to change the thermostat which i will b doing nxt week Quote Link to comment Share on other sites More sharing options...
Threeonthetree Posted November 6, 2009 Share Posted November 6, 2009 ^^ If the temperature gauge goes higher and higher and doesn't stabilise, it's probably due to your thermostat jamming shut. Change it and you should be sweet. Had the same thing happen in another R33 Skyline. Quote Link to comment Share on other sites More sharing options...
Elmo2003 Posted November 6, 2009 Author Share Posted November 6, 2009 aparently the series 1 rb25det motors are well know for having bad thermostats it only seems to rise wen i am in major traffic or under a lot of load eg towing trailers or going up rather large hills Quote Link to comment Share on other sites More sharing options...
KKtrips Posted November 6, 2009 Share Posted November 6, 2009 check the basics first check fan operation (running and blowing the correct direction) check water condition (clean and 50/50 water/antifreeze) replace radiator cap replace thermostat remove radiator and have it cleaned by a rad shop (tell them to take the tanks off) I would also check your FMI isn't blocking airflow to your radiator There are plenty of other things that can cause overheating but do these ^^ things first and come back if no results. Quote Link to comment Share on other sites More sharing options...
Prof Schnorz Posted November 6, 2009 Share Posted November 6, 2009 is it a DET radiator or a de/e? my first r32 had det (thick one) and 2nd r32 always got hot up big hills/on the beach, cos it had the standard 20e radator with 25det behind it Quote Link to comment Share on other sites More sharing options...
rob Posted November 6, 2009 Share Posted November 6, 2009 check your radiator hoses. i had a teensy tiny itsy bitsy split in one of mine (so small it was almost unnoticeable), but it was enough to make the car run about 1/4 hotter than it should. replaced hose for $8 and she runs like a minter now. also whats the condition of the coolant and the oil? could be a blown HG/cracked head.. they can be pretty sneaky sometimes.. I've had blown head gaskets that didn't foul the water or the oil, but if you took the cap off the radiator you'd notice the odd bubble coming up.. this made the car run hot too. Quote Link to comment Share on other sites More sharing options...
Elmo2003 Posted November 6, 2009 Author Share Posted November 6, 2009 check the basics firstcheck fan operation (running and blowing the correct direction) check water condition (clean and 50/50 water/antifreeze) replace radiator cap replace thermostat remove radiator and have it cleaned by a rad shop (tell them to take the tanks off) I would also check your FMI isn't blocking airflow to your radiator There are plenty of other things that can cause overheating but do these ^^ things first and come back if no results. the fan is brand new water condition is mint as still nice and green and intercooler has been on there for awhile b4 it started over heating but i will check the thermostat nxt week wen i get the time the top radiator hose is quite a lot hotter than the bottom 1 would this tell me that the thermostat is jamming Quote Link to comment Share on other sites More sharing options...
Elmo2003 Posted November 6, 2009 Author Share Posted November 6, 2009 check your radiator hoses.i had a teensy tiny itsy bitsy split in one of mine (so small it was almost unnoticeable), but it was enough to make the car run about 1/4 hotter than it should. replaced hose for $8 and she runs like a minter now. also whats the condition of the coolant and the oil? could be a blown HG/cracked head.. they can be pretty sneaky sometimes.. I've had blown head gaskets that didn't foul the water or the oil, but if you took the cap off the radiator you'd notice the odd bubble coming up.. this made the car run hot too. raditato hose are rather new like 1000kms or so old so they should b ok Quote Link to comment Share on other sites More sharing options...
Elmo2003 Posted November 6, 2009 Author Share Posted November 6, 2009 is it a DET radiator or a de/e? my first r32 had det (thick one) and 2nd r32 always got hot up big hills/on the beach, cos it had the standard 20e radator with 25det behind it it is a r33 gtst radiator is there any differance fron the rb20 ones to the rb25 ones Quote Link to comment Share on other sites More sharing options...
FLAWLES Posted November 6, 2009 Share Posted November 6, 2009 have you done a rb25 conversion? edit i need to learn how to read if so i would imagine that the radiator you have in there now, be it a n/a rb20/25de is not up to the task of transfering the heat so i would happily say you would need a det radiator or a nice big 4 core to help you out fmic tend to slow the airflow down around and to the radiator that would be my picking Quote Link to comment Share on other sites More sharing options...
Elmo2003 Posted November 6, 2009 Author Share Posted November 6, 2009 have you done a rb25 conversion? edit i need to learn how to read if so i would imagine that the radiator you have in there now, be it a n/a rb20/25de is not up to the task of transfering the heat so i would happily say you would need a det radiator or a nice big 4 core to help you out fmic tend to slow the airflow down around and to the radiator that would be my picking no the car is a factory rb25det it has been running mint for ages with minimal work needed on it but over the last couple of weeks it has been slowly overheating really annoying me i am sure that it is sumthing simple like a thermostat or in need or a radiator cleaning i have bleed the cooling system with the bleed valve by the manifold so it shouldnt hav air in there Quote Link to comment Share on other sites More sharing options...
FLAWLES Posted November 6, 2009 Share Posted November 6, 2009 yea sorry man, should have clicked and read what state is your water pump in? Quote Link to comment Share on other sites More sharing options...
Elmo2003 Posted November 6, 2009 Author Share Posted November 6, 2009 yea sorry man, should have clicked and readwhat state is your water pump in? pump should be good got it changed wen cambelt etc got done round 5000kms ago the top radiator pipe is getting quite pressurized compared to the bottom this would say that the thrmostat aint opening yes or no Quote Link to comment Share on other sites More sharing options...
Elmo2003 Posted November 6, 2009 Author Share Posted November 6, 2009 how does the radiator cap affect water temp Quote Link to comment Share on other sites More sharing options...
Hemi Posted November 6, 2009 Share Posted November 6, 2009 its not somthing silly like the thermo fan blowing through the rad ?? , some fans only work one way aka if you reverse current they dont blow etc do r33 have a viscous fan from factory?? , if so i would have kept that , dunno why everyone changes to electric , the amount of power you save nothing compared to the amount of suck mech fan can dish out Quote Link to comment Share on other sites More sharing options...
HighLUX Posted November 6, 2009 Share Posted November 6, 2009 do 33s have the bleed bolt on the plenum that you take out while filling the radiator? RB engines can be cunts to get all the air out of the coolant system so you may have an air lock Quote Link to comment Share on other sites More sharing options...
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