Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - SBC 400 Rear main Vs Rear Oil Pan Seal
View Single Post
  #7 (permalink)  
Old 02-11-2010, 07:18 PM
ericnova72's Avatar
ericnova72 ericnova72 is offline
More for Less Racer
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 48
Posts: 11,386
Wiki Edits: 0

Thanks: 82
Thanked 1,020 Times in 899 Posts
Originally Posted by zildjian4life218
Why did gm switch to the 360 degree one piece rear main seal in 87 then? Maybe I should have said "leak prone."
They actually switched due to government regulations on the "carbon footprint" of a car. Feds were looking at fluid drips x "xxx" million vehicles and the impact it has on the enviroment. This combined with the manufacturers push to offer longer warrantees were the reasons bottom end (and entire engine)sealing was revamped.
Reply With Quote