My 88 Olds wagone U/SA 10 Pennies

[SSDiv6]

Originally Posted by Bob Mulry

I didn't see a spec for lifter diameter in the NHRA Technical Bulletin for a 1988 Oldsmobile with a 307ci engine, but classracerinfo.com said .842 lifter?????

On line it looks like only the early Oldsmobile's take the .921 lifters????

Have you measured the lifter bores in your 307 block????

I am just confused

Bob,

1966-1967 400 and 425 Olds engines use a .921 Dia conventional hydraulic lifter.

However, the 1985-1988 Olds 307 with peanut ports, rated at 138 HP, and the 1981-1985 Olds 350DX diesel engine use a .921 hydraulic roller lifter.