Help with a misfire/coolant leak

[mgcorreia]

Hi Guys, I have a 1997 4runner 4 cyl with 219k miles on it, manual transmission. I have a problem with low coolant in the car, it causes a misfire in cyl 1 and I can hear coolant splashing my belts and see it on my dipstick when I check the oil, which is super high. Im tying to figure out the problem. Ive done some tests which include pumping up the cooling system through the radiator cap with air to check for leaks, which I didn't find any. Also did a compression test, on both wet and dry runs its an even 60 psi across the board. So that eliminates the head gasket, whew!! What other things should I test? Any ideas of where the problem might be? thanks!!

 

[Jc12]

your compression test results were 60 PSI? Unless the 4 cyls run super low compression compared to the 3.4 that seems oddly low. My compression was 180 across on the board.

 

[TheDurk]

your compression test results were 60 PSI? Unless the 4 cyls run super low compression compared to the 3.4 that seems oddly low. My compression was 180 across on the board.

Seriously! FSM Compression specs for the 3RZ-FE:

at 250 RPM:
STD: 178 psi or more
Minimum: 127 psi
Max Diff. between cyls: 14 psi or less

Page SS-5,Vol. I, 1999 4Runner Factory Service Manual

What do your plugs look like? Any washed clean?