poor quality parts

[blowinsmoke]

while rebuilding my motor, i decided to buy new rod bolts since the motor has about 300,000+ miles. I went to my local dodge dealer and bought new bolts. when i started to torque them there were 3 that wouldnt torque. I pulled them out and they had stretched about 3/16". has anyone else had this problem?

 

[CLiberty]

Might want to have your torque wrench calibrated? I had similar problems at my job (wrenching) a few years back and it turned out to be my TQ wrench was outta whack, food for thought.

 

[blowinsmoke]

it checked fine-just bad bolts

 

[Greenleaf]

This is off topic but thought I'd mention this. 300,000 miles is a broken in engine. Lot's of life yet. I'm assuming that the engine was operated with no oil pressure for some time?



-S

 

[JLEONARD]

I pulled them out and they had stretched about 3/16". has anyone else had this problem?

If that happened to me I would remove and return ALL of the bolts and go to a different dealer in a different area and get new ones. Or make 100% sure the new bolts from this dealer come from a different lot if they can find that out.

Or re-use the old bolts.

As an engineer it is understandable that poor quality bolts can get out there... . they may have missed the heat treat operation, or were treated improperly. It's possible that a large group of them may be suspect.

I've dealt with similar situations several times in my job.

Jay

 

[blowinsmoke]

no the engine was shut down in time and we have found NO damage whatsoever- havent even found any parts that are suspect EXCEPT the oil pressure bypass spring and plunger by the oil filter