M1008 6.2-flywheel to crankshaft to balancer

[dom1986ck30]

I have wondered if the grinding sound below my floor shifter, 4wheel drive, was related to my wobbly balancer. I have thought that my crank may be shot. There is no oil spilling whatsoever. I put a new flywheel about 4 thousand miles ago. New balancer about 3 thousand miles ago. Could the flywheel have effected the balancer or vice versa? Would the crank be wasted? I will pull inspection plate, but ****... Also, flywheel related to starter and the starter is clicking as well. Any input appreciated. Mahalo...

 

[cucvrus]

Did you try to run the truck with the fly wheel cover removed? Could that sound be coming from the cover?

 

[dom1986ck30]

No and yes... the cover COULD be the culprit. The balancer is new and wobbly... trying to figure out all the relative.

 

[dom1986ck30]

Would the flywheel, if cracked and junk, effect the balancer? It's just weird how I put in a new flywheel, then 1000 miles later, a new balancer.

 

[dom1986ck30]

I read all the time about worn starter hardware... maybe it started there... ironically speaking.

 

[someoldmoose]

I'm with cucvrus. Take the inspection plate off and see if noise goes away. I changed a clutch and dropped it one time years ago. One tiny dent that JUST touched the flywheel under certain loads / speeds. Couldn't see it from the outside but it was nice and shiny inside. If noise is still there, make sure the starter drive is withdrawing completely.

If the balancer is WOBBLING, in ANY manner (radially OR laterally - front to back) replace it.

 

[cucvrus]

Also make sure the M10 bolts are tight on the converter and flex plate. They are single use bolts with lock tight built into the threads. They need to be all 6 in place and tight. Same as the center mount for the flex plate. Good Luck.

 

[someoldmoose]

Also make sure the M10 bolts are tight on the converter and flex plate. They are single use bolts with lock tight built into the threads. They need to be all 6 in place and tight. Same as the center mount for the flex plate. Good Luck.

Yes, if the truck is auto trans and the converter to flexplate bolts are not properly tight it will KNOCK in neutral or under certain light loads. I just remembered this happening with my Suburban. I too thought the main bearings were going. You were saying flywheel, and "grinding" so I was thinking manual trans. The inspection plate check is still valid for either situation.

 

[nyoffroad]

Yes, if the truck is auto trans and the converter to flexplate bolts are not properly tight it will KNOCK in neutral or under certain light loads. I just remembered this happening with my Suburban.

Oh I remember that knocking sound well! I was on a trip and had them come loose and it messed up the threads so I couldn't tighten them! What to do? I'm stuck out of town and really couldn't afford to buy and pay for parts and labor so the good ole boy that owned a roadside shop let me use his MIG welder for a bit . Just snugged the bolts up and tacked the heads in place to keep them tight. That "temporary" repair lasted for years and that TC is still bolted/welded to the flex plate and mounted on the engine, though it's not being used. Ya do what you have to.

 

[cwc]

And make sure the bolts holding the flexplate to torque converter are not too long. I had one with a couple of longer bolts mixed in (the cover bolts maybe?) and the ends bottomed out on the torque converter without the heads tightening against the flexplate. The flexplate wobbled...


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