|
My sister's 89 wagon arrived with a blown head gasket last week. Engine overheated, empty reservoir, no obvious leaks, added water and drove it here.
Oil looked fine but reservoir seemed pressurized, rough idle, no power (couldn't drive it up ramps). OBD codes indicated O2 sensor (113) and AMM connection (121). Pulled ignition wires one at a time and found that cylinders 2 and 3 weren't firing. Wow the car can run on 2 cylinders! Compression test showed 2 and 3 were below 50 psi. Pulled head. Gasket blown between 2 and 3.
Measured warpage of head. Greatest between 2 and 3 (.008" across and .020" lengthwise). Haven't measured block yet. Haynes says maximum allowable is .020" and .040". But Brickboard says "The total maximum amount of combined clearance between the head and block should not exceed .004 inch (see Fig. 1). Don't forget to check it crosswise (also should not exceed .004 inch)." http://www.brickboard.com/FAQ/700-900/HeadgasketRepair/HeadgasketRepair.htm
So which is it? .004" seems wrong.
It needs resurfacing regardless, right?
--
1980 245 Canadian B21A with SU carb, M46 trans, 3:31 dif, in Brampton, Ont.
|
