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Kirkham Motorsports

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  #1 (permalink)  
Old 10-31-2015, 11:30 PM
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Default Oil pan studs or bolts?

I remember Barry R. saying in a post that studs don't provide enough clamping force vs bolts and will loosen over time, but that doesn't make sense to me. I like the installation advantages studs provide. Also, once you retorque them a few times to account for gasket compression, you can put another nut on them to keep the first one from loosening. Thoughts?
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Old 11-01-2015, 04:27 AM
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I don't have much experience in that area but, I used bolts because I had them at my disposal & had bought studs where I could afford it(thought it most important). I've had the pan off a couple times & studs would have mad things a little easier
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Old 11-01-2015, 04:44 AM
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I have always used bolts though studs would make putting the pan back on after removing it a little easier.

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Old 11-01-2015, 05:30 AM
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I put studs in (they came with the Canton pan I bought) and the the nuts CONSTANTLY loosened up! When I stroked the motor, I replaced them with ARP bolts. No more problem.

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Old 11-01-2015, 06:00 AM
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I used studs and 'The Right Stuff'. Once that sh** sets up, loose fasteners probably don't even matter.
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Old 11-01-2015, 08:43 AM
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I have pan studs on my 331 stroker. I installed them "quite snug" and then used the blue gasket, tightening the nuts appropriately. i haven't had any issues with loosening, and I like the ease of dropping and reinstalling the pan---should I need to.

Pan studs have worked fine for me.

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Old 11-01-2015, 09:45 AM
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Bolts are old school. I use.....
Studs add torque increase, easy installation and I heard better hold.
That's why they use in carbs, no?
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Old 11-01-2015, 10:06 AM
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I've had both studs and bolts with oil pans on ally CSX FE blocks and my experience says Barry is correct. I never tried to figure out why but his conclusion makes sense to me.
Studs are easier, though.
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Old 11-01-2015, 11:29 AM
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Studs are without a doubt stronger than bolts (not that an oil pan needs it). Nuts backing off is another issue altogether. I like the studs.
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Old 11-01-2015, 11:59 AM
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ARP bolts here with little issues.
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Old 11-01-2015, 03:07 PM
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I was able to replace the pan gasket in my Kirkham with the engine in the car because I had bolts. If I had studs, it would have been very difficult.
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Old 11-01-2015, 03:35 PM
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Studs, right stuff on gaskets, of which I use 2, moderate tension, after a couple heat cycles, go back for 2-3 odd ones that need to be snugged. You're done.
Have had zero pan drips with this system, Canton pan with windage tray.
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Old 11-01-2015, 04:24 PM
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Studs, right stuff on gaskets, of which I use 2, moderate tension, after a couple heat cycles, go back for 2-3 odd ones that need to be snugged. You're done.
Have had zero pan drips with this system, Canton pan with windage tray.
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Old 11-01-2015, 04:31 PM
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Quote:
Originally Posted by 4pipes View Post
I was able to replace the pan gasket in my Kirkham with the engine in the car because I had bolts. If I had studs, it would have been very difficult.
Well, that's a HUGE plus for bolts.
BTW. what oil pan do you run?
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Old 11-01-2015, 05:57 PM
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Quote:
Originally Posted by rodneym View Post
Well, that's a HUGE plus for bolts.
BTW. what oil pan do you run?

Aviaid dry sump pan with external oil pump, courtesy of Pat Buckley (give credit where credit is due).
BTW, there is a step where you have to hit the starter to move the throws/counter weights out of the way. Made me nervous with no oil!
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Old 11-01-2015, 06:02 PM
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Alright, I'm getting to old and have CRS disease. Just went out and looked.....I have friggin studs, NOT bolts!

That's why I had to reposition the crank.
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Old 11-01-2015, 10:13 PM
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I put Arp stainless studs and nuts on 2 weeks ago. Have had the pan off 2 times already (don't ask why) and it is easier than using bolts. It will come off again this week and I don't mind at all. The 4 corners are 5/16 studs with 3/8 12pt nuts and the rest is 1/4 studs with 5/16 12pt nuts.
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Old 11-02-2015, 04:11 AM
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Quote:
Originally Posted by lippy View Post
I remember Barry R. saying in a post that studs don't provide enough clamping force vs bolts and will loosen over time, but that doesn't make sense to me. I like the installation advantages studs provide. Also, once you retorque them a few times to account for gasket compression, you can put another nut on them to keep the first one from loosening. Thoughts?
Lippy. Why are you asking. Going to
change your pan?
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Old 11-02-2015, 05:22 AM
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Putting studs into ali has the advantage of not wearing out or stripping the threads over time. And if you use nylock nuts then they shouldn't loosen of.
JD
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Old 11-02-2015, 06:09 AM
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I will chime in.

I used ARP SS studs and SS locking nuts.

One huge reason for me was I could take that tangled mess that came in the gasket box and put hole-over-stud and then drop the pan on.

I used grease on one side of the gasket and in 15 years it has NEVER leaked.

Just my $.02 worth

Tru
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