Jump to content
SAU Community

Recommended Posts

Making this thread is in my last attempt that hopefully someone has information that I have managed to miss doing research. 

My R33 Skyline will overheat if the A/C is on and sitting at lights. By this I mean, car can be cruising and sitting on 78-82 degrees, pull up at lights and within say 5-10 minutes it will be at least 95 degrees. Usually once it gets to 90 I will turn a/c off and it will stabilize there or come down a degree. 

My tuner suggested that it was my headgasket as it was pushing a bit of coolant on the dyno. I had the engines block and head machined flat and ground to mirror finish to meet the MLS headgasket surface finish requirement. So new headgasket was fitted with new ARP headstuds. No more issues of pushing coolant and tuner said headgasket is 100%. 

This still didn't rectify the issue, so going down the worm hole I have ended up changing the thermostat to a new Genuine Nissan 76.5 degree thermostat. New Nissan waterpump, new Mishimoto Radiator (have also tried new OEM one, Mishimoto was slightly better). I have had my mate make ducting to the radiator (for underneath the car and bumper), purchased a GKTECH cooling panel. Car also has a new Nissan OEM fan clutch and GKTECH fan (which also performed slightly better than the stock fan). 

All this has made a difference to cruising, it will not go over 78 degrees. But when idling at the lights it will still hit 95 degrees. This only happens on 35 degree + days. 

I have considered upgrading the thermo used by the car for A/C  and installing an oil cooler but I feel like I'm just wasting money. 

The system has been bled multiple times and definitely does not have any leaks or air bubbles. 

Is there something I am missing?

Link to comment
https://www.sau.com.au/forums/topic/475674-r33-overheating-issues/
Share on other sites

Making this thread is in my last attempt that hopefully someone has information that I have managed to miss doing research. 

My R33 Skyline will overheat if the A/C is on and sitting at lights. By this I mean, car can be cruising and sitting on 78-82 degrees, pull up at lights and within say 5-10 minutes it will be at least 95 degrees. Usually once it gets to 90 I will turn a/c off and it will stabilize there or come down a degree. 

My tuner suggested that it was my headgasket as it was pushing a bit of coolant on the dyno. I had the engines block and head machined flat and ground to mirror finish to meet the MLS headgasket surface finish requirement. So new headgasket was fitted with new ARP headstuds. No more issues of pushing coolant and tuner said headgasket is 100%. 

This still didn't rectify the issue, so going down the worm hole I have ended up changing the thermostat to a new Genuine Nissan 76.5 degree thermostat. New Nissan waterpump, new Mishimoto Radiator (have also tried new OEM one, Mishimoto was slightly better). I have had my mate make ducting to the radiator (for underneath the car and bumper), purchased a GKTECH cooling panel. Car also has a new Nissan OEM fan clutch and GKTECH fan (which also performed slightly better than the stock fan). 

All this has made a difference to cruising, it will not go over 78 degrees. But when idling at the lights it will still hit 95 degrees. This only happens on 35 degree + days. 

I have considered upgrading the thermo used by the car for A/C  and installing an oil cooler but I feel like I'm just wasting money. 

The system has been bled multiple times and definitely does not have any leaks or air bubbles. 

Is there something I am missing?

Im also struggling with mine sitting in traffic or at lights on a hot day but as soon as i move the water temp drops down to normal temps within a minute or so. But my oil temp stays up there for a long time so i will definitely be purchasing an oil cooler as its a known issue with rbs to struggle with oil temp. Do you have an oil temp gauge and if so does that see huge increase when you're water temp goes up?

 

 

38 minutes ago, GTSBoy said:

95 is not overheating.

 

35 minutes ago, admS15 said:
38 minutes ago, GTSBoy said:
95 is not overheating.

Agree with this, especially if its a 35 degree day.

The issue is that it doesn't stop there, if I stayed still it would keep raising. 

To what?  If it doesn't blow coolant out the cap or overflow bottle, then it is not boiling and it is still working.  Thermostat on the Neo is set to ~90°, runs there all the time.  Air-con on in 38° traffic the other day saw my oil temperature running over 110°C (and my oil temp is usually exactly the same as my coolant temp) and I just kept driving and no engines were damaged.

Recently had similar issue with my daughters H6 subaru and it was caused by air con condensor blocked in lower half,  the condensor was changed and overheating at lights and in bumper to bumper traffic ceased. Just a thought.

Issue has been rectified by upgrading to a heavy duty thermofan on the front and shrouding it with foam around the base. With AC on at the lights on 36 degree day it stabilised at 82 degrees and after sitting for 5 minutes came down to 80 degrees. 

Old thermofan was very lazy. 

  • Like 1
  • 11 months later...

reviving an old thread. I’m having similar issues with my r34. Changed the thermostat and clutch fan. I thought it was solved till today’s scorching heat. Water temp quickly started rising. Oil temp sat at 110. Had to crank the aircon temp to the highest setting to keep the water temp to half the gauge.  What are the chances it’s something to do with the AC? Condenser or compressor?  

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • If that's the wiring from the factory, I'd be inspecting the loom everywhere.   Any signs of that anywhere else, and seriously, I'd get rid of the car ASAP before the electrical gremlins make it worthless, or it goes up in flames on its own. That is scary how that insulation is failing!
    • I should note too as I have all 4 wheel speed inputs to the emtron I now have the emtron controlling the attessa solenoid for 4wd/traction and launch control strategies. 
    • It works quite well with the adjustibility within each of the programs of the turbolamik. Essentially p1 is drive and lockup comes on like a normal driver.  But in program 7 I have customised it to not request the lockup clutch to engage until something like 6500/7 when slip was the lowest. 
    • Yep, I like that. The tags are only on the first post of a thread and we don't get huge numbers of new threads. Also, I plan to add some more report types and we could have a member report type like 'review tags' then members could flag if they thought a topic wasn't tagged correctly.  No way man, I dig the input. Thanks! 
    • It's a valid thought. There's not exactly that functionality already (when creating a thread) - that's where the OP can use/create any tag they want. We'd have to come up with a way for the user to request their tags get reviewed or something. Otherwise the mods would have to review every new post's tags (for those that have them, anyway). There's kind of that functionality already exists to some extent, post facto of starting the thread, where the OP or any other user could report the post to admins, and request that tags get reviewed. We could do this already, and any user could already have made such a request. To make it a part of the forum proper, it would require an initial and an ongoing education programme, so that people know that it's a thing. OP based tagging/request for review would also require at least some (probably most) of the user base to be told that it's a thing they can do. Both of these things probably wouldn't spread too far and/or get used very much. If it was the standard approach on a lot of different sites, then it might do, because people would be used to it. Prank's approach to this differs from my original thought, by leaning into tagging. Which is fine - it's possibly better than what I originally suggested. In fact, I just went to the R32 GTR wiring diagram thread and added tags, including "Library". That's probably a good way to use tags and the idea of a library. We just have to drag together an (organised!) index of threads or posts that have that tag. I have yet to do any of my own follow up by pursuing worthy threads and posts and reporting/marking/tagging them for the library, such as the @Sydneykid stuff I was talking about, and possibly any amount of @Lithium 's and others' posts. At least if I tag them Library, we'll have a start.   Back to @Wazmond's idea as it relates to @PranK's, we might have some sort of a list of tags that are already used to scrape for this library. I'm not entirely sure how that would be presented or used, particularly if it got long. But it's yet another idea!   cheers
×
×
  • Create New...