junkyard dog
New member
- Joined
- Oct 15, 2012
- Messages
- 85
So I have a real head scratcher right now. Needing some help from those more knowledgeable than myself.
I have a 91 1st gen I've been running a 97 215hp engine in for several years. Engine has been getting more and more tired so I tore down a 96 for a rebuild while still driving the 91. New engine is +.020 mahle power pack piston kit,balanced rotating assembly, Hamilton 178/208 cam,ATI balancer. I reused my injection pump, lift pump,turbos, and installed a new BD SS manifold. Ported the head a little,mostly cleaned everything up. Engine went together with out any real hiccups, fired it up to break in cam, had charge piping disconnected just in case. Upon initial start up I noticed a sound I've never heard from a diesel, it sounded like a gas engine that the timing had jumped on and was pushing air back thru the intake. I shut it down, tried to make heads or tails of it and decided to fire it back up. It is pulling air into the horn good,none coming out as the sound would make you believe. Ended up running it long enough to break the cam in. Retorqued studs and checked valve lash, nothing terribly out of adjustment, done an oil change and fired her back up. The sound increases and decreases with rpm. I have run the truck to operating temp multiple times now. Valve lash is still correct, truck is responsive, pump timing is a little off it seems but I was gonna check/reset that once I could drive it and get everything broke in. I'm at a lose on this one, anyone have any thoughts of wisdom???
Sorry for the novel
I have a 91 1st gen I've been running a 97 215hp engine in for several years. Engine has been getting more and more tired so I tore down a 96 for a rebuild while still driving the 91. New engine is +.020 mahle power pack piston kit,balanced rotating assembly, Hamilton 178/208 cam,ATI balancer. I reused my injection pump, lift pump,turbos, and installed a new BD SS manifold. Ported the head a little,mostly cleaned everything up. Engine went together with out any real hiccups, fired it up to break in cam, had charge piping disconnected just in case. Upon initial start up I noticed a sound I've never heard from a diesel, it sounded like a gas engine that the timing had jumped on and was pushing air back thru the intake. I shut it down, tried to make heads or tails of it and decided to fire it back up. It is pulling air into the horn good,none coming out as the sound would make you believe. Ended up running it long enough to break the cam in. Retorqued studs and checked valve lash, nothing terribly out of adjustment, done an oil change and fired her back up. The sound increases and decreases with rpm. I have run the truck to operating temp multiple times now. Valve lash is still correct, truck is responsive, pump timing is a little off it seems but I was gonna check/reset that once I could drive it and get everything broke in. I'm at a lose on this one, anyone have any thoughts of wisdom???
Sorry for the novel