Excellent Writeup on Olds Engine Oil Flow
#1
Excellent Writeup on Olds Engine Oil Flow
This article has a lot of pictures that show the paths of engine oil flow in an Olds 350 block, very informative and worth a look. It talks about oil restricters, etc... I'm not sold on the use of restricters, but the article discusses the positioning of the restricters for those that are interested:
http://blog.wrenchmanrepair.com/cate...mobile-engine/
http://blog.wrenchmanrepair.com/cate...mobile-engine/
#2
Originally Posted by wrenchmanrepair
The main restrictors as they are called restrict the oil going to the cam bearing journals ONLY. This increases the oil to all other areas.
By the way, if you keep reading on that page, he goes on to say that he isn't sure Olds made 455s in 1968...
#5
There may have been some good information in there. I couldn't tell because the guy's illiterate. Thanks for posting, though.
Last edited by BangScreech4-4-2; February 2nd, 2015 at 10:28 AM.
#6
Today's cam bearings that I have bought have small enough holes in them already. No restrictor is called for. Additionally, the restrictors in the lifter feed holes are not needed if the lifters meter the correct (small) amount of oil to the rockers. We are much better off today with the Melling 22HV pump; it flows a lot more than the old stock pumps. OTOH, I have a Mondello pump from the 1970s with his hard anodized box pickup for the Toro pan, and it gives plenty of pressure with well designed hydraulic lifters.
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