So, i have a 4.0 out of a d2 with 80k all apart.
I replaced this engine because the hg's were both leaking and i was unsure of the history (bought used). However the block i replaced it with is bad. Rather than purchase another used unit i am sending the first engine in to have heads and block pressure tested and tested for warpage etc.
The block and heads look good. I put a square across all surfaces and i cant see any warping or cracks. No evidence of liners slipping. I am hopeful that all is well with the block. i see no signs of any internal leaks but both hg's were leaking externally at the rear coolant channel. Both hg's broke and bent outward here. Also the rear bolts on the pass side were considerably more loose that any other bolts.
I was having another issue with this engine. In the am/after sitting a while the oil pressure would loose prime and would dry start. the crank smelled of exhaust to me but i cant be sure. I am hoping this was because of the loose bolts on the rear pass head i mentioned/exhaust gases getting in and killing the oil prime?
Bottom end looks pretty bad to me. The main bearings look ok to me but there is some light pitting in a few places even a burn mark on one. The rod end bearings were all worn: at least 50% copper showing through on all of them. Wrist pins all ok. If block tests out ok, i am going to have them check the crank shaft as well and see if i need to upsize bearings or not. Hopefully not.
Anyway, this will be my first rebuild sand first time messing with a bottom end so i am just looking for advise here. If all goes well i am estimating $800-1000 in the rebuild. Does my plan and thinking seem on par?
What are your thoughts on top hat liners? cost?
Cam bearings look ok, should i replace them or not? Have machine shop test them? The cam in it has a worn lobe. However, i have a good cam/lifters in the replacement engine. Thoughts on putting used cam in used cam bearings?
Any advice appreciated!
I replaced this engine because the hg's were both leaking and i was unsure of the history (bought used). However the block i replaced it with is bad. Rather than purchase another used unit i am sending the first engine in to have heads and block pressure tested and tested for warpage etc.
The block and heads look good. I put a square across all surfaces and i cant see any warping or cracks. No evidence of liners slipping. I am hopeful that all is well with the block. i see no signs of any internal leaks but both hg's were leaking externally at the rear coolant channel. Both hg's broke and bent outward here. Also the rear bolts on the pass side were considerably more loose that any other bolts.
I was having another issue with this engine. In the am/after sitting a while the oil pressure would loose prime and would dry start. the crank smelled of exhaust to me but i cant be sure. I am hoping this was because of the loose bolts on the rear pass head i mentioned/exhaust gases getting in and killing the oil prime?
Bottom end looks pretty bad to me. The main bearings look ok to me but there is some light pitting in a few places even a burn mark on one. The rod end bearings were all worn: at least 50% copper showing through on all of them. Wrist pins all ok. If block tests out ok, i am going to have them check the crank shaft as well and see if i need to upsize bearings or not. Hopefully not.
Anyway, this will be my first rebuild sand first time messing with a bottom end so i am just looking for advise here. If all goes well i am estimating $800-1000 in the rebuild. Does my plan and thinking seem on par?
What are your thoughts on top hat liners? cost?
Cam bearings look ok, should i replace them or not? Have machine shop test them? The cam in it has a worn lobe. However, i have a good cam/lifters in the replacement engine. Thoughts on putting used cam in used cam bearings?
Any advice appreciated!
