Jump to content
  • Welcome to SAU Community

    Welcome to SAU Community, like most online communities you must register to view or post in our community, but don't worry this is a simple free process that requires minimal information for you to signup. Be apart of SAU Community by signing in or creating an account.

    • Start new topics and reply to others
    • Subscribe to topics and forums to get email updates
    • Get your own profile page, build reputation and make new friends
    • Send personal messages to other members.
    • See fewer ads!

    Consider joining our newsletter for the latest content updates

    Click here to register


noperope

R33 Oil & coolant temp high on idle

Recommended Posts

The car has been running fine during everything from cruising to drift events while on the last drift event the temperatures started to run off after just 2-3 laps. The oil reached about 105C after which I took some cooling laps and got the temperature rather quickly back to 85-90C, the coolant was also increasing steadily and occasionally reached 100C while sitting on the grid, requiring some longer cooling runs. The weather at the time was about 25C.

Since that day I have had the temperatures creep up as as soon as the car is standing still will continue to increase, to the 100C and above. While cruising on the highway at 130km/h and 20C (cloudy) weather the oil sits at about 85C and the coolant about the same, but as soon as I stop the temperature starts rising again and within 5-8 minutes the oil temp reaches 100. The symtoms are the same from cold start, the temperature will continue to increase until there is air flowing through the radiator. The fan is running, not oil leaks or coolant leaks, the oil level is on par and the oil pressure is about 2bar on idle and 5 bar on 4k rpm. I'm using Greddy after market gauges. 

I'm running a RB25 with about 500hp, forged pistons, metal head gasket, GTX3076, after market radiator, oil cooler (mounted in front of the radiator).

I have tried to searching for similar threads/articles but usually find that their overheating problems are regardless of moving or not. 

Any ideas on where to start? 

Edited by noperope

Share this post


Link to post
Share on other sites

I run a similar setup in my rad and oil cooler. At idle it won’t go passed 86 and after 7 hard laps I’m lucky to see 95 and after a good 45sec burnout it will hit 105 bit drop down real quick. Those are all water temps unsure what my oil gets to.

Guessing you have an aftermarket ecu? Can you log in to it and see what your fans and set to come on at?

Share this post


Link to post
Share on other sites
5 minutes ago, WR33KD said:

I run a similar setup in my rad and oil cooler. At idle it won’t go passed 86 and after 7 hard laps I’m lucky to see 95 and after a good 45sec burnout it will hit 105 bit drop down real quick. Those are all water temps unsure what my oil gets to.

Guessing you have an aftermarket ecu? Can you log in to it and see what your fans and set to come on at?

That's what I used to see as well even during drifting. I'm running a Link G4 so I should be able to have a look what the settings are, however, I just want to point out that nothing has changed since it went on the dyno earlier this year. I'll take this into advice and see if I can maybe export some log-data while I'm at it.

Share this post


Link to post
Share on other sites

Check your thermostat mate. Best wishes.

Share this post


Link to post
Share on other sites

So, it is one of a very few things. Thermostat, as advised above. Radiator compromised. Water pump vanes eroded away.

Go forth and apply the logical procedure to work out what is wrong.

Share this post


Link to post
Share on other sites

Are you using the stock fan? What kind of radiator do you have? Does the radiator shroud fit properly with your new radiator?

  • Like 1

Share this post


Link to post
Share on other sites
9 hours ago, GTSBoy said:

So, it is one of a very few things. Thermostat, as advised above. Radiator compromised. Water pump vanes eroded away.

Go forth and apply the logical procedure to work out what is wrong.

The engine was pulled apart at the beginning of last year and had the water pump changed at the same time.

 

8 hours ago, KiwiRS4T said:

Are you using the stock fan? What kind of radiator do you have? Does the radiator shroud fit properly with your new radiator?

It's the stock fan indeed but the shroud is gone since a long time, never had it.

 

11 hours ago, hardsteppa said:

Have you tried a new thermostat?

As many of you already pointed out, I will have at the thermostat and replacing it regardless since it's such a cheap part and I don't know if it has ever been replaced. I'll report back when it's done.

Share this post


Link to post
Share on other sites

Kiwi nailed it. It's the lack of shroud

Share this post


Link to post
Share on other sites
20 hours ago, Ben C34 said:

Kiwi nailed it. It's the lack of shroud

 

20 hours ago, noperope said:

the shroud is gone since a long time, never had it.

 

I would have agreed with Ben, except that the change is recent and it has apparently never had the shroud. If it was the missing shroud, you would expect the problem to have always been there. That would suggest that it is something else that has changed recently. So, back to my earlier list, starting with the others' thermostat recco.

Share this post


Link to post
Share on other sites

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



×
×
  • Create New...