scrap--metal
Full Access Member
- Joined
- Sep 15, 2021
- Posts
- 692
- Reaction score
- 1,316
- Location
- MN
- First Name
- Calvin
- Truck Year
- '85, '81
- Truck Model
- K10, K20
- Engine Size
- 305, 350
Was this cam ever broken in? Not running or running at 3K will not allow for proper break in on a new cam.
I don't recall reading any cam specs, just that it was a brand new engine. Maybe a crate short block was used and the cam was already broken in (is that a thing)? Maybe the OP is using a roller cam?
Whether the cam was properly broken in or not, I'd suggest pulling the lifters and looking at the cam lobes just to make sure nothing bad has happened to them. Now's the time to do it with the intake manifold off.
I had a friend who toasted a hydraulic flat tappet cam in a new engine because he couldn't get it to run right upon initial start up. Too much messing around before the break in procedure.
I don't recall reading any cam specs, just that it was a brand new engine. Maybe a crate short block was used and the cam was already broken in (is that a thing)? Maybe the OP is using a roller cam?
Whether the cam was properly broken in or not, I'd suggest pulling the lifters and looking at the cam lobes just to make sure nothing bad has happened to them. Now's the time to do it with the intake manifold off.
I had a friend who toasted a hydraulic flat tappet cam in a new engine because he couldn't get it to run right upon initial start up. Too much messing around before the break in procedure.