Thrust bearing

[HuntedDuckV351]

I had a block line bored with New mopar performance caps and the thrust thickness on the block measures .930-.932 lower towards the bore if you go up it measures .936-.938. Does anybody know of a manufacturer that makes a thrust bearing thats narrow where it snaps to the block? I did talk to my machinist and he talked about peenig the bearing to make up the difference? Any other way to fix this or is the block junk?

 

[HuntedDuckV351]

It's a 1971 360 block....should be 600-625 HP

 

[Newbomb Turk]

I had a block line bored with New mopar performance caps and the thrust thickness on the block measures .930-.932 lower towards the bore if you go up it measures .936-.938. Does anybody know of a manufacturer that makes a thrust bearing thats narrow where it snaps to the block? I did talk to my machinist and he talked about peenig the bearing to make up the difference? Any other way to fix this or is the block junk?

The machinist should have faced both thrust sides. If he didn’t do it, take it back and tell him to fix it or find a machinist that grasps how to fit caps to a block.

It’s basic machining really.

 

[HuntedDuckV351]

He did face both sides....problem was he went to far....I can move the bearing side to side after I installed it in the block

 

[NC Engine Builder]

He did face both sides....problem was he went to far....I can move the bearing side to side after I installed it in the block

Then your "machinist" ruined your block

 

[RustyRatRod]

Then your "machinist" ruined your block

It sure sounds like it.

 

[PRH]

When both halves of the thrust bearings are pushed as far toward as they will go……… if the upper and lower meet to form a flat plane for the crank to push against, it should be okay.

 

[67Dart273]

When both halves of the thrust bearings are pushed as far toward as they will go……… if the upper and lower meet to form a flat plane for the crank to push against, it should be okay.

Do not agree. Bearing should be a tight fit on the caps.

 

[tjpatte]

When both halves of the thrust bearings are pushed as far toward as they will go……… if the upper and lower meet to form a flat plane for the crank to push against, it should be okay.

I was kind of thinking along this line. I believe the most force the thrust bearing is going to see is pushing forward under power. I would think that the pulled back once power is removed is minimal.

 

[RedFish]

Clutches kill thrust bearings
Some torque converters balloon to kill thrust bearings. I just can't figure wearing the casting though. Never even looked for a bearing made to fill a loss there.

 

[NC Engine Builder]

When both halves of the thrust bearings are pushed as far toward as they will go……… if the upper and lower meet to form a flat plane for the crank to push against, it should be okay.

Except when its cut on a taper, so there is one tiny spot touching at first, until it wears a little, and then the crankshaft moves foward and backwards a ton. The thrust surfaces of the bearing shells are designed to be parallel to the crankshaft when pushed foward. But when you have the upper and lower surfaces cut crooked, the block is ruined. A "machinist" who suggested "peening" the bearing is a hack

 

[MOPAROFFICIAL]

Clutches kill thrust bearings
Some torque converters balloon to kill thrust bearings. I just can't figure wearing the casting though. Never even looked for a bearing made to fill a loss there.

You have it backwards. The pump is trying to push the converter out the entire time.

 

[tjpatte]

Do we know if the taper is on both sides of the bearing face or just one side, not sure how you would measure?

 

[Inertia]

King used to make an oversized 360 thrust bearing shell.

 

[RustyRatRod]

King used to make an oversized 360 thrust bearing shell.

If they've cut the block on a taper, that won't really help.

 

[Inertia]

Future reference for someone

https://www.forabodiesonly.com/mopar/attachments/copy-of-360-oversize-thrust-bearing-pdf.1715577250/

 

[RedFish]

You have it backwards. The pump is trying to push the converter out the entire time.

And there is a flex plate with engineered movement to compensate. Research the early TCI I think it was. Aftermarket converters that ballooned.

 

[HuntedDuckV351]

Then your "machinist" ruined your block

I agree....the only thing else I might try the 1974 and newer main bearing as they have a taller flange.

 

[oldkimmer]

I agree....the only thing else I might try the 1974 and newer main bearing as they have a taller flange.

But I’m pretty sure the bearing won’t sit down in the saddle. Kim