Hey guys, new to the forum, first post here.
I’ve got a 1995 suburban k1500, 5.7 TBI. Blew a head gasket a few months ago so I decided to put in the garage and rebuild it myself… I’m not an expert but I know enough to be dangerous. When I pulled the heads off I took them to a local machine shop to be checked and resurfaced, passenger side head ended up being cracked so I got a replacement from him. Resurfacing the heads and replacing the valve seals was all I had done to the heads. Rocker arms, valve springs and push rods are all original.
I got everything put back together, set the valves at TDC and BDC per spec, timing set to 2° BTDC, and fired it up. Ran pretty good but had a lifter tap still, so I pulled the valve covers while it was running, backed each rocker arm off until it started tapping, slowly tightened it until it stopped, then gave each one an additional 1/2 turn.
I’ve got an issue with my #2 cylinder exhaust valve. If I tighten it until it stops tapping it’s noticeably tightened further than all the other rocker arms (3-4 turns tighter) and it runs like crap, not firing cylinder #2.
Has anyone encountered this? Maybe a bad valve spring?
I’ve got a 1995 suburban k1500, 5.7 TBI. Blew a head gasket a few months ago so I decided to put in the garage and rebuild it myself… I’m not an expert but I know enough to be dangerous. When I pulled the heads off I took them to a local machine shop to be checked and resurfaced, passenger side head ended up being cracked so I got a replacement from him. Resurfacing the heads and replacing the valve seals was all I had done to the heads. Rocker arms, valve springs and push rods are all original.
I got everything put back together, set the valves at TDC and BDC per spec, timing set to 2° BTDC, and fired it up. Ran pretty good but had a lifter tap still, so I pulled the valve covers while it was running, backed each rocker arm off until it started tapping, slowly tightened it until it stopped, then gave each one an additional 1/2 turn.
I’ve got an issue with my #2 cylinder exhaust valve. If I tighten it until it stops tapping it’s noticeably tightened further than all the other rocker arms (3-4 turns tighter) and it runs like crap, not firing cylinder #2.
Has anyone encountered this? Maybe a bad valve spring?