I have an Offenhouser (??) oil pan on my '65 engine, it is retained with round head slotted machine screws, is this normal instead of hex head bolts, or does it matter which are used ? Larry Cooper

Not normal! but should be OK...not much torque is needed.

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Should be hex head bolts.Unless you've got really strong hands it's unlikely you'll get proper torque settings with a screwdriver.That being said if it's not leaking leave it alone.

In the Hub City, Belen NM

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Do they have a wood screw type thread?







1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

Someone in the past might have had a screw loose. Ggggg

Steve Morton
1961 Rampside,
63 vert,
64 coupe,
65 EO vert,
67,
#0003 1969

Morton's Classic Garage
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Nampa, Idaho 83686
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My Corvair mechanic of yore did not like the bolts supplied with an Otto Parts pan (30? years ago), so ended up using socket head machine bolts with a flat washer and lock washer.

..I'd prefer to install studs into the block to avoid stripping out the aluminum and having to put inserts in.. 1" (?) 1/4-20's and 'coupling' nuts w/ lockwashers,or flats w/ locknuts would do..

Tom Z,,Rochester NY

Thanks for the info, I really like the idea of putting studs in the block, I think I will do that. Larry Cooper

I think Allen bolts or hex bolts with the flange and 3/8 head instead of 7/16. I believe there are some recessed spots where a 7/16 socket won't fit.
If you're determined to use studs, I like set screws that are installed with an Allen wrench. There's a bolt store near me with a full line of these and they're just the ticket sometimes.
Jim Brandberg
Isanti, Mn.
CorvairRepair.com