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Old 08-27-2019, 11:33 PM   #1
benno81
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Default 1 or 2 piece rms

Ive got a sbc with 2 piece rms im looking at buying a used oil pan
How do i tell without fitting to my block if the pan is to suit 1 or 2 piece rms?
Thansk
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Old 08-28-2019, 11:48 AM   #2
Mike Beck
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Default Re: 1 or 2 piece rms

Not sure if the measurements are published somewhere, but the rear of the pan has a much larger opening for the 1 piece rear main seal compared to the 2 piece version. I have a 1 piece RMS pan in the garage I can measure but don't think I have a spare 2 piece RMS pan around here right now.
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Old 08-28-2019, 03:31 PM   #3
Supe
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Default Re: 1 or 2 piece rms

5 1/4 wide for the 1 piece seal opening vs about 4 3/8 for the 2 piece if I recall.
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