fine69
Well-known member
- Joined
- Dec 12, 2004
- Messages
- 975
- Location
- Maryland / D.C.
- Corvette
- '69 Convertible Vette; '72 Z28 Camaro Rally Sport
fine69 said:I have a recurring problem with my roller tip rocker arms... they keep becoming misaligned with the valve/spring! I adjusted them last week, and the engine was running nice and strong. Today it started missing, sputtering and backfiring again. I removed the valve cover, and the rocker arms were misaligned again.
I have the Performer RPM .510 lift cam (hydraulic) and wanted to be able to use the LT-1 style valve covers. These are 1.5 ratio roller tip rocker arms.
I attached a photo. Is this milagnment and readjustment characteristic of these type of rocker arms? Should I revert to the standard style i.e., "shoe" type? Any suggestions/recommendations are appreciated.
Thanks!
This is a long post, and I apologize.
I decided to create a new thread as this problem is heading in a new direction.... I maaaay have a sticking valve problem.
In addition to the rocker arms becoming misaligned, a persistent problem has been misfiring and backfiring coming from the left exhaust.
What's been done:
- roller tip rocker arms replaced w/stamped type.
- guide plates readjusted.
- distributor replaced.
- points, condenser replaced.
- set timing, points, dwell.... not very well.
While the rockers now maintain alignment, I still have the misfiring/backfiring problem.
The technician from the machine shop worked on it today. He told me in the past he had worked on a set of brand new heads that had to be removed from a Camaro resulting from "old" gasoline. He said that the internals of the heads had become completely coated with a thick, sticky resin and actually affected functionality. No problem for them to clean, but of course this means removing and reinstalling the heads - but in the car this time.
My car sat dormant from March through November 2005 with approx 1/8 tank of gas. Last summer was pretty nasty, and I noted that some of the gasoline appeared to have evaporated. I simply added more, and didn't know I should have used some type of stabilizer.
The engine initially ran well when I first got it started, with a slight misfire (I presumed it was the distributor). I kept advancing the timing and it appeared to help - but the problem has now intensified.
Has anyone ever heard of this sticky valve condition from old gas? Could it truly affect brand new heads in this manner? It could possibly explain why the roller tips slipped off track.
Thanks and again, sorry for the dissertation. This is incredibly frustrating.
Ralph