Jump to content
SAU Community

Recommended Posts

Hello all,

Just helping out my nephew with a problem he is having.

He has taken his car back to the workshop 3 times and still has a problem with overheating.

Can you unblock a radiator by flushing it?

Can you have a air blockage if the thing has not been bleed properly?

Is there any other sorts of things that can be causing this re-occuring problem?

Thanks in advance

:D

Link to comment
https://www.sau.com.au/forums/topic/139794-over-heating-on-gtr32/
Share on other sites

You can reverse flush your cooling system, id be getting the radiator professionally done by the proper people as they have special equipment for all that which wont damage the radiator.

Yes you can have a air pocket stuck in the cooling system, If any of the pipes are above the motor they can get an airpocket in them, you should gently push down on the pipe if its higher than the motor to make it level while the engine is running the pocket should bleed itself out with the radiator cap removed.

Could also be a faulty thermostat, radiator pressure cap umm thats all i can think of at the moment, possible water pump??? i guess if its ceased.... not too sure on that one.

Cap, air-pocket,thermo,or pump.....any more.

Surely water pumps can't cease?

yeh they can.

Check around the pump for signs of water leaking out.

Water gets out-air gets in!!

I had slight water usage just before destroying an engine due to a head gasket that had corroded thru from the water jacket to the combustion chamber.

Used a slight amount of water before going bang.

Good luck lets us know wat u find.

. Check radiator cap see if seal still good, only cost $10-20 for a new one.

. Check for signs of leakage from water pump.

. Pull radiator out, send it to a Radiator shop for removal of of tank and a good flush.

. When re-fill coolant, jack the car up a bit, runs heater at full blast, bleed coolant from the screw on the engine block.

. Check or test Thermal Stat.

. Still don't work, a leak down test will tell.

Cap, air-pocket,thermo,or pump.....any more.

Surely water pumps can't cease?

No, they SEIZE. (Well, I guess when they seize, they cease.)

But the Japs are famous for not using inhibitor in their cars, and the blades on the pump impeller corrode away - that's the more usual problem.

He has taken his car back to the workshop 3 times and still has a problem with overheating.

Can you unblock a radiator by flushing it?

I believe radiator shops take the tanks off the ends and clear out any blockage by simply pushing metal rods through the core. I havent got a std radiator in mine so i'm not sure whether they can have this treatment.

Also, to check the thermostat just put it in a sausepan of warm water on the stove with a thermometer and check that it opens at the right temperature (cant remember what that is tho).

Rgs,

Kot

lol yeah i really am a girl

and yeah with what mr kotter said i think from memory it could be around 50-60degrees, but check on that, beacuse i could be waay off

Thanks I will see if its the thermostate then.

;)

  • 3 weeks later...

Stock gtr thermostat opens at 76.5c Most engines thermostats open much later..

Elk: No, they SEIZE. (Well, I guess when they seize, they cease.)

LOL

Yeah ive seen plenty of them seize.

Id first be checking your overflow bottle level, if its low do a presure test on the system. If not run the engine and check that both lower and upper radiator hoses get hot meaning the thermostat has opened. leave the cap off during this period making sure there are no more air bubbles coming out before you put it back on..can take upto10 mins or more.. Give the engine a rev to help circulate the coolant and remove air pockets.. Once this is done then check to make sure your fan clutch is grabbing once hot enough. If he has overheated it bad enough there is a good chance you have screwed the head gasket too.. Possibly do a Co2 test to confirm.

Deren

Edited by Godzilla32

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

    • So stock ECU does not like anything above 10 psi?  That Nistune one is just for "try" if it will be any different, I know it need to be tune for that. I know but YOU may know about these problem but i/we dont. They few little Skylines here let alone people who know anything about tham so that is why iam asking here  
    • So now we have a radiator with no attachments whatsoever. It lifts up with a particularly tight spot between the drivers side air box mount and the lower radiator outlet, but if you've got this far you will sort that too. This is the lower mounts with the rad out so you can see where the rubber bushes go, it is a straight shot upwards Done! Assembly is the reverse of disassembly, with blood less likely to be shed.
    • Right, onto the second last trick. The Air Con condenser is mounted to the front of the radiator and stays in the car when the radiator is removed. There are 2x 10mm headed self tappers holding the top of the condenser to the radiator, remove those The bottom of the condenser is attached to the radiator with clips. You need to lift the condenser out of those clips and clear (up, then forward). f**ked if  could work out how to do that last bit with the front bumper on. I hope you can, and you share the trick.  Bumper removal probably deserves its own thread one day once I've recovered the will to live, but basically you need to remove the wheels, front inner guard liners (clips and 10mm headed bolts), the self tapper between the guard and the bumper at the rearmost point of the bumper (same as an R32 that bit), any remaining clips at the top/front of the grill, an absolute bastard design with a plate that holds the top of the bumper above the headlight each side (only 1 bolt which is tricky to get to, but the plate catches 2 places on the bumper and must be removed....carefully!) and push clips between the bumper and guard under the headlight. If you've done all that you will be faced with wiring for the fog lights on both sides and in ADM Q50 RS at least, 4 nasty tight plugs on the driver's side for the ADAS stuff. So, the clips at the bottom look like this on drivers side (looking from the front) And on the passenger side (also from the front), you can see this one is already out Clearance on both of these are super tight; the condenser needs to move up but the upper rad support mount prevents that, and the radiator can't move down far because it is (rubber) mounted. Once you achieve the impossible and drop the condenser off those mounts so it does not stop the rad moving, you are good to go
    • OK, next the shroud needs to come off and there are a couple of tricks. Firstly, there is a loom from near the passenger side headlight to the fans, coolant temp sensor etc and there is no plug to undo.  In my case I was OK to leave the shroud on top of the engine so I just undid the passenger side fan plug and about 10 of the clips which gave enough free wire to put it aside. The fan plugs were super tight, the trick I used was a small falt screwdriver to push down on the release tab, then a larger flat screwdriver to lever the plug out of the fan unit....be careful with how much force you apply! If you need to remove the shroud altogether for some reason you will have to deal with all the plugs (tight) and clips (brittle)....good luck. I removed all of the clips and replaced them with cable ties that I will just cut next time. Also, in the Red Sport / 400R at least, the intake heat exchanger reservoir hose is bolted to the shroud in 2 places with 10mm headed bolts; so remove them (the hose stays in the car; no need to undo it at the t fittings down at the radiator lower mount. Once you've dealt with the HX hose and the wiring loom, there are 3x 10mm headed self tappers holding the top of the shroud to the radiator; remove those.   The shroud then lifts out of the bottom mounts where it sits on the radiator, up and onto the engine out of the way. Simples
    • Ok, disregard my “rate them” comment, sorry for my unrealistic input
×
×
  • Create New...