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New long block vibration
- Thread starter Denis otr
- Start date
Twisted Steel Performance
Anything worth doing is worth overdoing.
Tell us more about this "long block"... rebuilt, new, used ???
New balancer, used balancer, new or used front pulley, flex plate or flywheel?
I know this is your first post but we aren't mind readers, if you want a good answer to any question give lots of details ...
New balancer, used balancer, new or used front pulley, flex plate or flywheel?
I know this is your first post but we aren't mind readers, if you want a good answer to any question give lots of details ...
I apologise for not giving you something to work with. 93 silverado k3500 crew cab. 6.5l with mechanical injectors and pump. I put a rod through the oil pan. Decided to get a long block from bostic motors. Sent injectors and pump to diesel equipment in Michigan.after installing making sure timing was advanced slitely on drivers side of timing mark. Engine started instantly as I hoped it would. Fixed afew leaks and hear I am vibration. I'm thinking possible bad injector and how do I check it out??
I believe it was a new balancer came with block, my pulley.
Flex plate from old block.
Flywheel from old block
MrMarty51
Well-Known Member
That pulley from the old block is kind of worrisome.
I also wonder about the Harmonic Balancer, if it is just one that had been cleaned up and installed onto the reman engine then it too could be whacked out too.
I also wonder about the Harmonic Balancer, if it is just one that had been cleaned up and installed onto the reman engine then it too could be whacked out too.
Will L.
Well-Known Member
On the balancer- only 2 options. AC Delco which is good for 100,000 miles safely or fluid dampr which will do a better job and last half million miles. Dont bother with cheaper ones- many fail at 30,000 miles and will break crankshaft/ block.
The pulley in front of it should be done at same time. Again options are AC Delco for 100k or billet from Leroy’s that is good tor a lifetime.
On injectors: crack line nut one at a time and if there is nonoticeable difference, examine that cylinder. Swap good injector with the suspect one and if problem follows injector- that is it. Get new injectors from Leroy if needed.
I would STRONGLY suggest a compression test. Bostic engine could be questioned. They could have reused slightly bent rod, a piston issue, or have used chinese heads which are known to not seal when brand new. I have seen people throw thousands of dollars into “fixing” when they had a poorly built long block to start with.
post a video someplace like bitchute or youtube and put link here of it running- we might pick up on something.
Let us know before buying parts anywhere- many places to avoid. Learn from our collective mistakes.
do you have a clear line on the ip return to check for air intrusion?
The pulley in front of it should be done at same time. Again options are AC Delco for 100k or billet from Leroy’s that is good tor a lifetime.
On injectors: crack line nut one at a time and if there is nonoticeable difference, examine that cylinder. Swap good injector with the suspect one and if problem follows injector- that is it. Get new injectors from Leroy if needed.
I would STRONGLY suggest a compression test. Bostic engine could be questioned. They could have reused slightly bent rod, a piston issue, or have used chinese heads which are known to not seal when brand new. I have seen people throw thousands of dollars into “fixing” when they had a poorly built long block to start with.
post a video someplace like bitchute or youtube and put link here of it running- we might pick up on something.
Let us know before buying parts anywhere- many places to avoid. Learn from our collective mistakes.
do you have a clear line on the ip return to check for air intrusion?
Twisted Steel Performance
Anything worth doing is worth overdoing.
Well now that "Bostic" has been mentioned, as stated compression check is needed, but I can already tell you that if you do find something... anything wrong, it's yours, Bostic won't back anything, it's always the buyers fault... hope the best for you...
Will L.
Well-Known Member
Sure wish we could have warned you before buying from there.
So look long and hard now at how you paid for this Bostic POS. Time to do so is limited. Credit card? PayPal? I made another krap vendor eat it through a dispute after they sent me two boat anchors that were supposed to be good running take out 6.2 engines. Why they bothered to even ship one scrap metal iron hunk is beyond me. It took me 3 rounds before I prevailed. I wound up parting the truck out and lost a chunk of change on parts I already bought.
ak diesel driver
6.5 driver
If you need help you can look me up, I have quite a few tools etc
ak diesel driver
6.5 driver
So the engine you're working on is not in AK now?