1988 Mazda b2200 Coolant in exhaust

1988 MAZDA B2200
260,000 MILES • 4 CYL • 4WD • MANUAL
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SKOOKUM
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Hey there, Im workin on a B2200. The current issue is Coolant being burnt off thru the exhaust. Classic white sweet steam. The tests i've performed are : Rad pressuering test, Holds pressure, And not gaining pressure from compression leak. Check plugs, #3 being suspiciously clean, But Cyclinder NOT . Pressureing up each cyl. on TDC watching for bubbles from rad, None. Compression test All 4, normal and no dramatic pressure loss. Visual inspection of each cyl. with a scope, normal. The coolant is building up in the exhaust somewheres and burning off when the motor starts burning. I suspectded head gasket at first, but every test and inspection ive done proves me wrong. I am keeping rad pressure toped up with a tester and leaving it sit for a few hours, then im gunna check the cylynders agian for leakage, and i am also going to pull the exhaust manifold off to see...? Anybody have this issue? any answers? HELP LOL
Jan 14, 2010 at 6:21 PM
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BILLYMAC
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Hi
You pretty much have this under control. your prob will most likely be #3.i would run pressure tester on until eng is at normal operating temp.

There is a small possibility of a hairline crack in the head ,most likely if so it would be in the threads.

while you have guage on and eng hot. remove #3 plugraise that cyl to tdc. now pressureize this cyl with air and a adaptor.see if there is a pressure change on the guage.



hopefully this may help..
Jan 14, 2010 at 6:53 PM
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SKOOKUM
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Yeah thats what i am pretty much at with for ideas. i have already pressured up #3 with air and adapter, and nothin has shown :( Utterly Bafeling . Adios.

Thank god for parts truck.
Jan 15, 2010 at 1:49 AM
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