Robyn
02-04-2007, 22:10
Well the beast is all apart now and mostly steam cleaned.
The bottom end was a 5 alarm train wreck but the block is fine.
Very little wear showing in the cylinders at all.
Have 2 cylinders that have some scoring. (BORE TIME)
The heads look wonderful.
I have dusted the deck surface of the block off with a large wire wheel on the big 9" grinder as well as doing the heads.
After steaming the heads off really good and cleaning the surfaces well, I
pulled the exhaust valves out one at a time and they are perfect.
My plan is to clean the valves/guides and springs as well as the rotocaps
in solvent and then reassemble them.
The precups on a couple cylinders have the usual small cracks in the port area but not at all bad.
I think one or two cylinders had a small crack between the valves but nothing to worry about.
The gaskets were pristine with no noticable degradation of the gasket at the water ports as one usually finds on a high mile engine.
The block is a 599 with a D144 date code.
It is a 6.2 and the bearing dates confirm the engine to have been built in 94
The bearings shells were stamped GM A250 on the rods and A200 on the mains with 9-94 dates on the rods and 3-94 on the lower main shells and 9-93 on the upper main shells.
This thing must have been a crate engine that was purchased to replace the original engine that had been in the truck.
The owner had paid some serious $$$$ last july to have the turbo installed.
It was run about 15K miles and the sucker went south, losing 2 rods and breaking a piston.
I am still at a loss for why it failed.
The thing was so badly thrashed that any real conclusions from the post mortem are not forthcoming.
The rods that failed were 5 and 6 most likely one failed then the other.
The nuts were barely tight but I blame that on the pounding and stretching things did.
The cam looked good but I tossed the lifters due to all the contamination.
The pistons and rods went in the round can also.
I have a 6.5 crank and rods and will replace the pistons with new.
Looks like some .5mm OS will due fine to freshen things up.
The turbo and all the kit parts look sweet.
The exhaust was cut in about 5 places to get it from the truck but I can slide some sleaves over the cut areas and weld things back together and all will be near new condition.
The exhaust pipes were not even rusty yet as was the muffler.
This kit was on a dually crew cab so I will need to shorten the center pipe a tad to fit the system on my Burb.
Not the way I wanted to get a Banks turbo system but OH WELL.
With the injectors and the pump off I will get them to the pump shop and have them tested and any needed work done so they will be ready to fly once the engine is back together.
I am thinking this little beast should make the old Burb truck down the trail in style.
All for now
Will keep the info coming as it unfolds..
Robyn
The bottom end was a 5 alarm train wreck but the block is fine.
Very little wear showing in the cylinders at all.
Have 2 cylinders that have some scoring. (BORE TIME)
The heads look wonderful.
I have dusted the deck surface of the block off with a large wire wheel on the big 9" grinder as well as doing the heads.
After steaming the heads off really good and cleaning the surfaces well, I
pulled the exhaust valves out one at a time and they are perfect.
My plan is to clean the valves/guides and springs as well as the rotocaps
in solvent and then reassemble them.
The precups on a couple cylinders have the usual small cracks in the port area but not at all bad.
I think one or two cylinders had a small crack between the valves but nothing to worry about.
The gaskets were pristine with no noticable degradation of the gasket at the water ports as one usually finds on a high mile engine.
The block is a 599 with a D144 date code.
It is a 6.2 and the bearing dates confirm the engine to have been built in 94
The bearings shells were stamped GM A250 on the rods and A200 on the mains with 9-94 dates on the rods and 3-94 on the lower main shells and 9-93 on the upper main shells.
This thing must have been a crate engine that was purchased to replace the original engine that had been in the truck.
The owner had paid some serious $$$$ last july to have the turbo installed.
It was run about 15K miles and the sucker went south, losing 2 rods and breaking a piston.
I am still at a loss for why it failed.
The thing was so badly thrashed that any real conclusions from the post mortem are not forthcoming.
The rods that failed were 5 and 6 most likely one failed then the other.
The nuts were barely tight but I blame that on the pounding and stretching things did.
The cam looked good but I tossed the lifters due to all the contamination.
The pistons and rods went in the round can also.
I have a 6.5 crank and rods and will replace the pistons with new.
Looks like some .5mm OS will due fine to freshen things up.
The turbo and all the kit parts look sweet.
The exhaust was cut in about 5 places to get it from the truck but I can slide some sleaves over the cut areas and weld things back together and all will be near new condition.
The exhaust pipes were not even rusty yet as was the muffler.
This kit was on a dually crew cab so I will need to shorten the center pipe a tad to fit the system on my Burb.
Not the way I wanted to get a Banks turbo system but OH WELL.
With the injectors and the pump off I will get them to the pump shop and have them tested and any needed work done so they will be ready to fly once the engine is back together.
I am thinking this little beast should make the old Burb truck down the trail in style.
All for now
Will keep the info coming as it unfolds..
Robyn