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screws or bolts ?
Posted by: larry cooper ()
Date: January 11, 2014 06:23PM

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

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Re: screws or bolts ?
Posted by: MattNall ()
Date: January 11, 2014 06:25PM

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

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Re: screws or bolts ?
Posted by: bill darcy ()
Date: January 11, 2014 06:27PM

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

Lead from behind..... get left in the dust
"I have not failed I've just found ten thousand ways that won't work" Thomas Edison

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Re: screws or bolts ?
Posted by: davemotohead ()
Date: January 11, 2014 06:31PM

Do they have a wood screw type thread? angry smiley







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

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Re: screws or bolts ?
Posted by: strangecars ()
Date: January 11, 2014 07:09PM

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
Parts and Service
Nampa, Idaho 83686
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Re: screws or bolts ?
Posted by: RobertC ()
Date: January 12, 2014 12:19AM

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.

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Re: screws or bolts ?
Posted by: Tom Z ()
Date: January 12, 2014 01:17AM

..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

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Re: screws or bolts ?
Posted by: larry cooper ()
Date: January 14, 2014 05:54PM

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

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Re: screws or bolts ?
Posted by: JimBrandberg ()
Date: January 15, 2014 05:15AM

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

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