Over-heating On Gtr32

[700HP-GTR33]

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

[gtrchick]

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.

[700HP-GTR33]

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

Surely water pumps can't cease?

[YLD-CHLD]

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.

[West]

. 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.

[blind_elk]

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.

[700HP-GTR33]

Thanks for the replies........

GTRCHICK....are you really a chick?

Anyway i will keep you updated on what it is?

Cheers.

[MrStabby]

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

[gtrchick]

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

Edited October 25, 2006 by gtrchick

[700HP-GTR33]

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.

[700HP-GTR33]

All good....we changed the hoses...no more overheating.

Thanks for all your help.

[Godzilla32]

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 November 16, 2006 by Godzilla32