Thick vs. Thin Front Oil Pan Seal
Thread Starter
Melting Slicks
Joined: Mar 2005
Posts: 2,838
Likes: 10
From: Austin TX
Thick vs. Thin Front Oil Pan Seal
Refresh my tired memory. In 75, Chevy went to the thicker front oil pan seal for SB's.
Was it the oil pan that was changed to accomodate the thicker front seal, or was it the timing chain cover?
Thanks!
Was it the oil pan that was changed to accomodate the thicker front seal, or was it the timing chain cover?
Thanks!
Safety Car
Joined: Jun 2004
Posts: 4,354
Likes: 214
From: Beecher Illinois
Quick search using all the right words turned up this.....
"Determine the front seal surface radius by measuring from the pan rail flange surface (no gasket) to the 6 o'clock position on the seal surface. If it's 2-1/4", it takes the "thin" front seal; if it's 2-3/8", it takes the "thick" front seal."
"Determine the front seal surface radius by measuring from the pan rail flange surface (no gasket) to the 6 o'clock position on the seal surface. If it's 2-1/4", it takes the "thin" front seal; if it's 2-3/8", it takes the "thick" front seal."
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Quick search using all the right words turned up this.....
"Determine the front seal surface radius by measuring from the pan rail flange surface (no gasket) to the 6 o'clock position on the seal surface. If it's 2-1/4", it takes the "thin" front seal; if it's 2-3/8", it takes the "thick" front seal."
"Determine the front seal surface radius by measuring from the pan rail flange surface (no gasket) to the 6 o'clock position on the seal surface. If it's 2-1/4", it takes the "thin" front seal; if it's 2-3/8", it takes the "thick" front seal."
also ... with rare exception, most aftermarket pans employ the later front gasket with thick section.
Safety Car
Joined: Nov 2008
Posts: 3,705
Likes: 550
From: Seattle Washington
Just to add a little more cunfusion there is also a medium Seal. I have an Engine with a 69 Block and an aftermarket Pan. I havn't tryed to buy one of these in a long time and the last time I did it was getting hard to come by. Most Parts Guys thought I was Nuts.
