No matter how opinionated they may be.
When I got my 416 stroker back from the machine shop, it had ARP main bolts in it. This would have been fine, but I distinctly remember telling the builder I wanted ARP studs in there. Long story short: I had a set (ARP studs,new) laying around the shop. So I flipped the short block over, removed the bolts, and installed the studs (as per ARPs specs). My question: will the builder get peed off (I know, you don't know him, but if it were you?), have I disrupted the integrity of the build? Any other stuff you kings of engine building can come up with pertaining to this question?
Oh, by the way, the builder had to take the short block back 'cause he put the wrong rings in too. He tore down the short block, built it back up using my per-installed studs, and never said a word.
I guess I'm just wondering what your thoughts on my bolt/stud swap are if he didn't have to put the new rings in? The engine's been running great for months now.
Thanks,
M

It seems that he isn't a good communicator or a good listener. etc. If you (the customer) asked for something specific you should have gotten it, or he should have given reasons for not wanting to do it the way you wanted and settled that with you before moving forward. In short? I'd have looked for a different engine builder.

If you are asking if changing something he did without his input or approval voids your warranty with him? I'd say yes, it does. That would be chalked up to a mistake on your part although what you did is probably just fine, it leaves the excuse door wide open to blame any future failure on you.

I would agree with Scott unless he had the crank out when replacing the rings. Then I would say he reassembled it with the studs in place therefore his problem.
And yes find another shop 2 errors on 1 build ????
I do know of a long established shop in Walnut Creek

Pretty sure main studs are NOT a drop in replacement for main bolts.

going from bolts to studs; be sure and check the end play in the crank!

Quote:

---

Pretty sure main studs are NOT a drop in replacement for main bolts

---

ARP is a top tier company - if they weren't a "drop in" they'd have included instructions.

Why should end play change? The studs use the same holes as bolts.

I suspect when the OP installed the studs he did not remove the caps. When the bozo swapped the rings, he probably didn't either - that would have been unnecessary and more work on his dime.

Checking end play is easy enough - I just don't see the point.

Interesting he didn't mention it. Admission he didn't do the right thing?

what did you torque the studs too? what did he torque the caps to when he line bored it? arp has specific torqueing instructions included with their bolts and studs and they are higher than factory torque ratings. time to recheck and get some answers at a minimum.

for him not remembering what he put in your engine, not a big deal. for him using the wrong parts? that is a big deal.

I've swap main bolts for studs after having new main caps installed on my first 400 stroker motor, not the same motor but both yours and mine have two main bolts and both had ARP fasteners like yours. I did measure the main bore before and after and saw right at .0002 differences, not enough for me to worry about when I had over .0035 clearances to start with I think the last perfect man on earth is not here anymore, he is sitting beside his father in heaven, according to the bible I believe. My message is you should have discuss this with your engine builder when you discovered the error, he may or may not have fixed it or told you why, if he diecided to ignore youur desires and put the bolts in instead of doing what you wanted. I'm a firm believer in when a shop makes one mistake give them a chance to fix it, when they make two or more it is time to find a better shop BTW, good shops are a lot harder to find than the not so good ones out there Good luck