Couple of questions about oil change on my '79

[Francoc]

-The Bentley manual shows the oil drain plug to be a big hex bolt. Mine is an Allen plug (6 mm wrench). Do I have the correct plug?

-I'm a little confused about the drain plug washer and the strainer washer. What are the specs on each? Is one a crush washer and the other one solid? Today I asked an NAPA for a drain plug washer, and he gave me a copper crush washer with an I.D. of about 12.5 mm. Did he give me the right part?

Thanks.

[timvw7476]

the center nut is for the strainer, black plate, it takes a crush-washer,
9 ft/lbs is the max value, no more than that.
the drain on your bus has been replaced, it is 'off center' from the
case parting line, uses a solid non'crush washer,or teflon tape, or....?
It's an old bus so whatever works, I tend to re-use the sump drain
washer over & over again & leave the strainer/sump plate alone.

[Francoc]

I found a little more information in the ratwell page. The type 4 cases have two different drain plugs: one is a M12x1.5 with a 19 mm hex head, and the other (the one I have) is M14x1.5 with a 6 mm Allen head and a dished plastic washer. Why is this information not in the Bentley manual?

[airschooled]

[sjbartnik]