Toyota MR2 Message Board - View Single Post - overheating --i need fresh ideas not the same old stuff

GINA2MR2 · 09-19-2009, 12:49 AM

1991 NA
5sp
120k
mods-
GTO pedals
K/N cold air intake off 5.7 camaro
dump style exhaust
toms style scoop
strut bar (rear)
no AC system
14"16"18" wheels i run the 18s right now
ETCETC
Stock engine- stock plugs and wires
I added a rear fan in the engine bay to cool it

My car will drive fine for weeks then all the sudden the coolant will be gone. The reservoir will go from full to empty suddenly. Then it will start to heat up. I always shut it off if it even hints of overheating

---
I'm thinking there might be a head gasket issue. I have not had any trouble with the head gasket before. Another possibility is the water pump.

I'm really looking for fresh ideas OTHER then bleeding the system, check hose clamps, and the regular initial troubleshooting techniques.

--
heres what ive done so far
-
new thermostat
removed radiator-flushed
flushed entire cooling system
flushed water jackets (i did this when thermostat was replaced)
new 'radiator' cap
replaced all hose clamps with worm style and replaced hoses that seemed to be less than amazing condition haha

- engine performance-
gets good mpg
has great power, no loss anywhere.
doesn't smoke or burn any oil
oil comes up clean and i recently replaced the valve cover gasket and plug seals
there was no sign of antifreeze in the valve cover (very clean)
-

Thank you.

09-19-2009, 12:49 AM	#1 (permalink)
GINA2MR2 Not A VR6 Join Date: Dec 2007 Location: J-Town Posts: 339 Thanks: 3 Thanked 7 Times in 7 Posts iTrader Rating: (0/0% )	overheating --i need fresh ideas not the same old stuff 1991 NA 5sp 120k mods- GTO pedals K/N cold air intake off 5.7 camaro dump style exhaust toms style scoop strut bar (rear) no AC system 14"16"18" wheels i run the 18s right now ETCETC Stock engine- stock plugs and wires I added a rear fan in the engine bay to cool it My car will drive fine for weeks then all the sudden the coolant will be gone. The reservoir will go from full to empty suddenly. Then it will start to heat up. I always shut it off if it even hints of overheating --- I'm thinking there might be a head gasket issue. I have not had any trouble with the head gasket before. Another possibility is the water pump. I'm really looking for fresh ideas OTHER then bleeding the system, check hose clamps, and the regular initial troubleshooting techniques. -- heres what ive done so far - new thermostat removed radiator-flushed flushed entire cooling system flushed water jackets (i did this when thermostat was replaced) new 'radiator' cap replaced all hose clamps with worm style and replaced hoses that seemed to be less than amazing condition haha - engine performance- gets good mpg has great power, no loss anywhere. doesn't smoke or burn any oil oil comes up clean and i recently replaced the valve cover gasket and plug seals there was no sign of antifreeze in the valve cover (very clean) - Thank you.