Engine/Transmission (1994 - 1998) Lifter cover leaking

[Budro]

My 96 2500 4x2 std has developed a major leak at the lower front of the lifter cover, right behind the injector pump. I consider it major to the tune of 2 gallons in 60 miles. It took a major washing of the engine compartment to locate it. Has anyone experienced this and know of a easy cure other than pulling the injection pump and resealing the cover? I tried tightening the 10mm head bolts that I could get to but its still leaking. HAPPY THANKSGIVING

 

[JDKammin]

Make sure it is not your oil pressure sending unit that is leaking. It is located in that area. If it is the lifter cover, the only way to replace it, is to pull the injection pump. This would be a good time to install some govenor springs and fuel plate, if you have not done this yet.

 

[Joseph Donnelly]

To replace that gasket, you need to remove the injection pump and possibly the fuel filter housing. You will remove the boost tube and air intake “horn” for access. When I changed mine, I put 3M Super Weather strip Adhesive in the groove of the gasket where it fits over the edge of the stamped steel cover. I didn't put any sealer on the rubber where it contacts the block, but cleaned the block with lacquer thinner in the area. I also replaced the rubber seals around the bolts. You should first check that the timing pin hasn't come out, the gear case isn't broken by a “killer” dowel pin or case bolt coming out, the oil pressure sensor is not leaking, and the vacuum pump isn't leaking. See my article in Issue 61, p. 102. You can get to TDC with the timing pin in the gear housing and get close to stock timing with the pin inside the injection pump. This pin can be accessed by removing a domed cap with a hex for a large wrench (around 15/16” if I recall).

 

[Budro]

Thank you for your comments on my leaking lifter cover. In thinking back this leak seems to happen right after an oil change. After about 200 miles it seems to seal off and seep until the next oil change. Not he best time of year for it to go down, but is there ever a good time? I'll get my nerve built up and tackle it this weekend.



MERRY CHRISTMAS TO ALL



J Jones



'96 4x2 extended cab 4spd, cermanic button clutch, EGT and Boost, all else stock