locating coolant leak

[rhvcjack]

I have been trying to trace a coolant leak, but have had no success. I noticed the coolant dripping from the oil pan, then i traced it up from there. I went up the left side of the engine. The only thing over there cooling related is the thermostat and the bi-pass lines. Neither of which are leaking. I checked the oil and i don't notice any water. I'm not sure how the coolant passages run through the engine, but i'm guessing that i have a failing head gasket. Should i look at anything else before i start taking things off the engine? I have a 97 Century and the leak is not really bad. I have to add coolant once every 3 to 4 weeks. Would a sealant additive help? I should also mention that i have recently had a thermostat problem and the engine coolant temperature needle did indicate very hot several times (that i noticed) before i replaced the thermostat. Not sure if this may have any bearing on the problem or not.

[tman]

check around where the intake manifold meets the heads, and the engine block

[rhvcjack]

Yes, that is the area it is coming from, though it is difficult to pinpoint. I've been trying to search using an inspection mirror, but there is just not enough room.

[tman]

I've done it, not incredibly hard, just long, and time consuming

[Flatrater]

I am sure that your 3.1L engine intake gaskets are leaking. It is a common problem on this engine GM has issued revised intake gaskets to cure this problem.

[rhvcjack]

Ok, i will replace the gaskets. Thanks for the help.

[rhvcjack]

New gaskets in place and no more leaking. You are right, it did take a lot of time, but wasn't difficult. Thanks again.