Mopar thrust bearing failure

d miller · 09-11-2017, 04:11 PM

I would think that BillK might be on to something here

Is this a new engine or has it run before without hurting the thrust bearing ?

The reason I ask is I had a problem with a thrust bearing in a 350 Chevy years ago. The block had been align honed and when they cut the cap they cut it crooked and it was tilting the thrust bearing just slightly. Took me a while to figure it out.

Did something change in your combination right before your thrust problem started ?

Just thinking out loud

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CMcAllister · 09-11-2017, 04:23 PM

I agree the rod failure would be hard to pin on a trans issue. Not so with the thrust. 7 to 8 thou is a good number. Bump or pry the crank back and forth a few times before tightening the main cap and force the crank towards the front of the engine when torquing that cap down.

If the issue started after having the trans apart, I would have someone familiar with that unit in a race application look closely at it. Would be nice to run it on a trans dyno to verify pressures before putting it back in.

09-11-2017, 04:11 PM	#1
d miller Junior Member Join Date: Jun 2007 Location: canada Posts: 6 Likes: 1 Liked 1 Time in 1 Post	Re: Mopar thrust bearing failure I would think that BillK might be on to something here Is this a new engine or has it run before without hurting the thrust bearing ? The reason I ask is I had a problem with a thrust bearing in a 350 Chevy years ago. The block had been align honed and when they cut the cap they cut it crooked and it was tilting the thrust bearing just slightly. Took me a while to figure it out. Did something change in your combination right before your thrust problem started ? Just thinking out loud [/QUOTE]

09-11-2017, 04:23 PM	#2
CMcAllister Senior Member Join Date: Sep 2006 Location: Fulton County, PA Posts: 620 Likes: 17 Liked 924 Times in 262 Posts	Re: Mopar thrust bearing failure I agree the rod failure would be hard to pin on a trans issue. Not so with the thrust. 7 to 8 thou is a good number. Bump or pry the crank back and forth a few times before tightening the main cap and force the crank towards the front of the engine when torquing that cap down. If the issue started after having the trans apart, I would have someone familiar with that unit in a race application look closely at it. Would be nice to run it on a trans dyno to verify pressures before putting it back in.