72 250 6 cyl cam?
Is the stock cam flat tappet hydraulic or full roller hydraulic??
|
Re: 72 250 6 cyl cam?
Flat tappet. I honestly don't know of any roller cam setups. Well at least I didn't when I built mine 3 years ago.
|
Re: 72 250 6 cyl cam?
yeah I assumed since IIRC 88?? was when GM went to full roller
Given the low zinc content in todays conventional oil, I may add some Rislone zinc additive. Not sure what was used by PO's. Motor has about 116k mi on it but runs quiet as a mouse with that said I used conventional 10-30 in my flat tapped hydraulic 327 motor without issues |
Re: 72 250 6 cyl cam?
For a new cam I would definitely run high zinc oil (Valvoline Racing) plus additive ( I used GM breakin additive or Lucas oil brand) . That is what I do on all mine for breakin. It might be an overkill, but It stinks to loose a cam on break in for a few dollars extra on lubricants. Then I normally end up using the Rotella T4 diesel oil after the initial break in period
|
Re: 72 250 6 cyl cam?
I use break in oil even on full roller cam motors (Valvoline VR1) on first start and 500 mi
While I have not had issues on motors with just flat tappet hydraulic cams using todays conventional 10-30 oils (read motors that have a good deal of milage on them)....I am going to add zinc additive to conventional oil in the 72 250. Its the original motor, I assume untouched, but todays oils just don't have the zinc content they did pre CAT motors |
Re: 72 250 6 cyl cam?
Quote:
https://www.12bolt.com/store/p196/Bi...292_Chevy.html Most "stock" flat cams are perfect for street use....just remember the Zinc additive unless you are using Valvoline VR oil.... :chevy::chevy::chevy: |
All times are GMT -4. The time now is 08:50 AM. |
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com