k_stewart_21

iTrader: (2)

What would cause water/antifreeze to blow out of the top of the reservoir cap?? This happened while at about 6000 rpms

shbox

Checked your radiator cap recently?

k_stewart_21

iTrader: (2)

How you tell if its bad?

k_stewart_21

iTrader: (2)

Cap is tight and secure on radiator, as is the cap on the reservoir, which was where it blew put at

02v8ta

iTrader: (8)

assuming you've never had the cooling system/ hoses apart recently you're getting air somehow in the cooling system. Doesn't matter if the cap seems tight still might not hold the correct PSI and you should be hoping its the cap and not something more wallet damaging. Other common issues causing this are blown head gaskets or you have another less serve break in the cooling lines.

If you really want to rule out the cap instead of just buying a new one (is it stock or ever been replaced) they sell/rent some pressure tester thing at your local chain auto store usually to test both the cooling system under pressure and the cap. Good Luck.

k_stewart_21

iTrader: (2)

I did recently put a tranny cooler on and didn't cap off where the old lines went. I can replace the cap no problem though

shbox

You test it with a tester, like 02v8ta said.

Evil Opti

How warm is the car running?

k_stewart_21

iTrader: (2)

It's been running awesome between 160 and 180 for the past two years. Never had a problem

SS RRR

iTrader: (2)

As stated, get a tester at any autoparts store. Cap should hold 18psi of pressure before the spring compresses.