radiator issues

[jakesae101]

i currently have the problem of water spitting out the overflow in the trueno the car doesnt run hot or anything was low ish last time i put like a litre of water in it to get it to go over the fins i was thinking radiator cap not sealing but the car runs fine temp gauge stays just below half

[MAGN1T]

It's your headgasket of course.

Steve

[Adoom]

Replace the cap with a new one.
If its still blowing water out, you could have a blown head gasket and its blowing into the cooling system.
One test to try:
Wait till the radiator has cooled so you can take the cap off without the water exploding out. While the cap is off, run the engine. It it makes bubbles in the water, the head gasket is blown.

[jakesae101]

hmm bled the cooling system up and no more bubbles than expected we will see if it does it again its funny if it was a blown head gaskit i would have expected it to have goten hot atleast once since ive owned it (it only did this in the last week or 2) no water in the oil i did a oil change last week and its sweet as and its never used any water apart from now and it doesnt blow any smoke

[Crucible]

Checking for bubbles in the system IMO isnt really a positive way to check for a leaking headgasket and can be a bit misleading. TK check or leakdown would be more accurate.

unless its completely obvious.

I would replace the cap first, It doesnt sound like a flow prob as it would be overheating frequently. check that your fans are cycling also.

[jakesae101]

just replaced the cap and did a flush and coolent change it was weird as it didnt do it all the time i only noticed it after racing one day and checked the water but took it for a run and it hasnt done it and yes the fans are working

[rollaholic]

i presume you are certain that there is not a leak somewhere else.

i guess if you diagnose BHG often enough sooner or later it will be right

[jakesae101]

nope it doesnt leak any water no puddles no nothing

[rollaholic]

you wont always get puddles. pressure test is best, and you'll want to test the old cap too