Join Date: Jun 2010
Location: Frankton, Indiana
Hoosier Rick is offline
Re: Valve seal replacement
What are your symptoms? Smoke on startup?, fouled plugs? oil consumption?
4.3 and small block from that era had umbrella seals on the intake valves, but only o rings on the exhaust.
I had a Monte Carlo with a 5.0 that was smoking on startup. I installed umbrella seals on the exhaust, which fixed the smoke, but down the line, it ate a valve guide, I had to replace a cylinder head.
I bought a high mileage 1992 with a 4.3. Smoked a little on startup at times, but didn't use oil. I left it alone.
Ran that truck to 357,000. Never added oil between changes.
1992 rcsb 4.3,at 357,000 miles. Rust in Peace
2000 Jimmy 4x4 4dr. 255,000 miles
2002 rcsb, 2.2 at, 289,000miles