Originally Posted by david01130

I am losing water pretty bad and have no external leaks. Here are the facts:

--Drove 450 miles from San diego to san jose and had to refill 3 times with 1-2 gallons of water

--new radiator with 16lb cap

--when I refill it there is water in the overflow tank but not as much as what i put in

--compression test shows all cylinders between 110-120 except cylinder 1 is 90 and cylinder 5 is 68

--took off right head and head gasket looked good along with the valves and piston looked good too.

--when Im driving on the freeway the engine stays very cool at only 1/4 up from cold yet still seems to fill up the overflow tank witha 16lb cap

Anyone have any ideas? Im taking off the left head now.

Originally Posted by david01130

Yea I checked both head gaskets several times and they seem to be pretty good. Im going to buy new head gaskets and intake manifold gaskets now. There seem to be a lot of weird things that arent tied together. Cylinder 4 looks like it has a brand new piston in it. I mean it it spotless clean. I dont know why just one piston would be replaced and I was thinking maybe that cylinder wasnt firing. I also cant find anything wrong with piston 5 which has bad compression. For the water problem I am starting to think it has a bad cap. There are two different caps made by the same company and look exactly the same with the same pressure (model number 330 and 331). Im going to purchase the other cap and see if that solves the problem. Hopefully Ill have everything back together by the end of the night.

Originally Posted by robert71fastback

it could be lost in the exhaust side of the heads check the exhaust for excessive moisture or sweet smell of anti-freeze coolant

Originally Posted by david01130

It could be that. How would the water get in the exhaust side of the head?