I bought the 93 k2500 in my sig a year ago or so. The po told me it had some kind of major engine problem. He was towing a small trailer when it started making bad sounds like a rod bearing or something like that. He had it towed home and started taking it apart and then walked away. The truck sat for 3 years before i bought it. He had drained the rad.took the crossover exhaust off and unbolted the torque converter.
I assumed the engine was junk. Truck has 210,000 miles on it. Bought it for $700. He had just[less than 500 miles] had the ip rebuilt and had paid that much for that. So now to find a engine. I found a 93 6.2 n/a out of a short bus with 95,000 miles on it at a small junkyard for $300.
So I finally get to working on it and deside to start it up to hear just how bad it really is. It sounded terrible but I couldn't tell where all the bad noise was coming from because of the exhaust being off.It did have a pretty bad miss also. So, time to yank the engine.
I get the engine out and this is the first thing I find is the center is broke out of the flexplate. That would explain the horrible knocking but not the miss. Time to dig in deeper. I want to have arp head studs and a new cloyes timing chain anyhow.When I get the timing cover off I find the bolts that hold the drive gear on the IP were all loose and hitting the timing cover.:nonod: Hadn't fallen out yet.Looks like it was doomed even if the flexplate hadn't broke. Heads came off next and all the cylinders look good except #7.
Rust pits at the bottom of the bore. Unshure if head gasket leaked or just condensation. The other cylinders had absolutely no ridge. So now my choices are:give up on this engine and use the 6.2 or spend over $1000 on this one to have bored and new pistons or hone #7 cylinder and put new rings in just that hole.
I went for the hone #7 with new rings[fingers crossed].I can always go for either one of the other choices if it doesn't work. Only out the head gaskets rings and my time if it doesn't work out:mad2:
I put the arp head studs in and checked the decks and heads for flat.:thumbsup: No visable cracks. I took a couple of bearing caps off and bearings look very good.
Other goodies put in while apart are:all new valve seals, cloyes timing chain and sprockets,front and rear main oil seals, new bosch HO water pump, ac delco thermostat, new medallion injectors,pmdcable oil line/cooler kit, dual frost plug heaters and new home made heavy duty starter brace to clear frost plug heater on passenger side.
The most time consuming part is the cleaning and painting[waiting for engine bay to dry now]
Engine should go in tomorrow after I get the energy suspension motor mounts in.
Here's some pics:
I assumed the engine was junk. Truck has 210,000 miles on it. Bought it for $700. He had just[less than 500 miles] had the ip rebuilt and had paid that much for that. So now to find a engine. I found a 93 6.2 n/a out of a short bus with 95,000 miles on it at a small junkyard for $300.
So I finally get to working on it and deside to start it up to hear just how bad it really is. It sounded terrible but I couldn't tell where all the bad noise was coming from because of the exhaust being off.It did have a pretty bad miss also. So, time to yank the engine.
I get the engine out and this is the first thing I find is the center is broke out of the flexplate. That would explain the horrible knocking but not the miss. Time to dig in deeper. I want to have arp head studs and a new cloyes timing chain anyhow.When I get the timing cover off I find the bolts that hold the drive gear on the IP were all loose and hitting the timing cover.:nonod: Hadn't fallen out yet.Looks like it was doomed even if the flexplate hadn't broke. Heads came off next and all the cylinders look good except #7.
Rust pits at the bottom of the bore. Unshure if head gasket leaked or just condensation. The other cylinders had absolutely no ridge. So now my choices are:give up on this engine and use the 6.2 or spend over $1000 on this one to have bored and new pistons or hone #7 cylinder and put new rings in just that hole.I went for the hone #7 with new rings[fingers crossed].I can always go for either one of the other choices if it doesn't work. Only out the head gaskets rings and my time if it doesn't work out:mad2:
I put the arp head studs in and checked the decks and heads for flat.:thumbsup: No visable cracks. I took a couple of bearing caps off and bearings look very good.
Other goodies put in while apart are:all new valve seals, cloyes timing chain and sprockets,front and rear main oil seals, new bosch HO water pump, ac delco thermostat, new medallion injectors,pmdcable oil line/cooler kit, dual frost plug heaters and new home made heavy duty starter brace to clear frost plug heater on passenger side.
The most time consuming part is the cleaning and painting[waiting for engine bay to dry now]
Engine should go in tomorrow after I get the energy suspension motor mounts in.
Here's some pics:
