2 piece vs 1 piece rear main seal pans
02-14-2009, 02:51 PM
#1
Team Owner
Thread Starter
Member Since: Mar 2001
Location: Boston, Dallas, Detroit, SoCal, back to Boston MA
Posts: 30,607
Received 239 Likes
on
167 Posts
2 piece vs 1 piece rear main seal pans
What a quick way of telling whether a pan's for a 1 piece or a 2 piece rear main seal?
A friend of mine has a old dry sump pan and I want to see if it will fit.
A friend of mine has a old dry sump pan and I want to see if it will fit.
02-15-2009, 10:28 AM
#3
Le Mans Master
02-15-2009, 11:06 PM
#8
Melting Slicks
Member Since: Dec 1999
Location: Austin, TX
Posts: 2,813
Likes: 0
Received 0 Likes
on
0 Posts
Brian, the pan for a one-piece has a larger diameter rear gasket area (the semi-circle area). Unfortunately the easiest way to tell the difference is to have them side-by side or at least have a pic of the one you need handy.
There are VERY FEW one-piece rear dry sump pans out there. Canton and Hamburgers (mine is a hamburgers) are the only ones I've found (there may be others). Most racers use either new LS1 stuff or the older 2-piece cranks.
If you need, I can measure the rear of my stock one -- it's just sitting in the garage. Let me know.
There are VERY FEW one-piece rear dry sump pans out there. Canton and Hamburgers (mine is a hamburgers) are the only ones I've found (there may be others). Most racers use either new LS1 stuff or the older 2-piece cranks.
If you need, I can measure the rear of my stock one -- it's just sitting in the garage. Let me know.
02-16-2009, 11:28 AM
#9
Melting Slicks
Member Since: Dec 1999
Location: Austin, TX
Posts: 2,813
Likes: 0
Received 0 Likes
on
0 Posts
Brian, here's the pan I have on mine. I just welded in an additional pickup. The pics in this ad may help you.
http://cgi.ebay.com/ebaymotors/Parts...1%7C240%3A1318
http://cgi.ebay.com/ebaymotors/Parts...1%7C240%3A1318
02-16-2009, 04:07 PM
#13
Melting Slicks
Member Since: Dec 1999
Location: Austin, TX
Posts: 2,813
Likes: 0
Received 0 Likes
on
0 Posts
Slightly less accurate measurements since I used a ruler :o
1 piece seal pan (stock 1996 pan):
2.25" deep from the rails to the seal OD
5.25" wide across at the seal
So it's a pretty significant difference.
1 piece seal pan (stock 1996 pan):
2.25" deep from the rails to the seal OD
5.25" wide across at the seal
So it's a pretty significant difference.
02-16-2009, 04:22 PM
#14
Race Director
Good info, I have always wondered myself about the size differences, it looks like the 1-piece is obviously larger in both directions
