ARP 2000 Bolts
#1
Junior Member
SHOW GUEST
Thread Starter
Join Date: Sep 2010
Posts: 1
ARP 2000 Bolts
Has anybody had ARP 2000 Bolt failures. Recently built a 434 and had four rod faliures in which there was no bearing failure and ARP 2000 bolt heads were missing from the damaged rods. And yes everything was torqued, .0065-.0068 bolt stretch measured.
#3
Senior Member
RACING JUNKIE
Join Date: Jan 2006
Location: La.
Posts: 2,890
We had a failure a couple yrs. ago with some ARP 8740 bolts, but they were older and i don't know how many times they had been torqued. I do know that since then i'll not put an engine together without new bolts, and i guess that the question were these new bolts or had they been used before?
I'd definately get in touch with ARP, but they are butt holes to deal with unless you're a big name racer.
Zip.
I'd definately get in touch with ARP, but they are butt holes to deal with unless you're a big name racer.
Zip.
#4
Member
JUNIOR BUILDER
Join Date: May 2005
Location: Dexter, New Mexico
Posts: 69
Rumor was that they had a bad batch of bolts awhile back. An acquaintance had a brand new R-M 632 kick rods out in the water box first pass. They fixed it n/c but you might ask R-M a few questions if they'll talk to you............ 8) JB
#5
Senior Member
MASTER BUILDER
Join Date: Aug 2003
Location: Big Lake, Minnesota
Posts: 162
Hmmmm...Did the bad batch of bolts in the L19s too? My friend put together a 540 and on the 10 pull on the dyno it blew apart. The two bolts were sheared off right at the threads and there was no damage done to the rod cap....