arp L-19 torque spec
Jun 23, 2015, 04:35 PM
#17
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There is really no reason to do that. If everything is absolutely clean (very important) and ARP's Ultra-Torque lube liberally applied, everything is good to go. Torquing in steps is done to ensure even torque being applied across the mating surface without creating pinch spots. There is no other hidden magic. Just follow the instructions to the letter, and it's finished.
Jun 23, 2015, 05:02 PM
#18
I understand, but if this were necessary with the current metallurgy and lubricating agent, ARP would specify it in their instructions. The ARP tech department is very well versed in the metallurgy and loading behavior of their fasteners. If one has questions, they're just a phone call away.
One important piece of information they will explain in detail is how the printed torque figure is determined, and why it should not be exceeded.
One important piece of information they will explain in detail is how the printed torque figure is determined, and why it should not be exceeded.
Jun 23, 2015, 05:20 PM
#19
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I understand, but if this were necessary with the current metallurgy and lubricating agent, ARP would specify it in their instructions. The ARP tech department is very well versed in the metallurgy and loading behavior of their fasteners. If one has questions, they're just a phone call away.
One important piece of information they will explain in detail is how the printed torque figure is determined, and why it should not be exceeded.
One important piece of information they will explain in detail is how the printed torque figure is determined, and why it should not be exceeded.
This. ARP Engineers know more about their fasteners than any engine builder or school instructor could ever hope to...
Jun 23, 2015, 06:48 PM
#20
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It's not so much metallurgy. As breaking in the threads from the sharp edges that may be there from the tooling process. H11 head studs I've bought have that break in torque sequence in the instructions. I know it's not the l19's but yeah. It doesn't hurt to do
Jun 23, 2015, 08:28 PM
#21
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H11's aren't ARP's....
Jun 23, 2015, 09:01 PM
#23
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Are they the same? Are you sure ARP doesn't debur their studs before shipping them? I've installed a lot of ARP hardware, and unless it was shipping damage (which I then didn't use it), I have never had one thread in any less than perfectly smooth. I don't get why you wouldn't follow the manufacturers instructions. I mean, you'll follow them for the H11's, but you won't for the ARP's. Seems weird...
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