The subject of fasteners comes up frequently enough that I should have organized this shopping list some time ago. Oh well woulda, shoulda coulda ... Here it is now and it is also in the TToC Engine Builds Section. This listing covers every ARP fastener that is commonly used on our engines, the part number, how many you need and the torque or, in the case of the connecting rod bolts, the stretch spec required for proper installation;
I have also provided a downloadable pdf version of the file as an attachment to this Article.
Ed, for those of us that did not do the crank snout stud, the ARP bolt there is another good option. In case you want to add it: 156-2501 is what went in to mine. Also, the ARP2000 head studs that have the six-point nuts: 256-4001.
Possibly add the ARP 10mm bolt part number for the stock cams. And would the 200-8717 washer also work for the 10mm? This list is gonna save many members a lot of time searching great idea Ed.
You guys are correct on both items. I intentionally left them out of the listing because they were not as good and the 12 point nuts in the case of the head studs. The situation with ARP's cam and crank OEM replacement fasteners is even more so. While better than OEM, those fasteners provide a false sense of security both in the case of the 12mm crank snout bolt and also the 10mm cam bolts.
If a builder wants to have a self inflicted wound, I want him to have to deliberately select the less robust solution and figuratively push the knife into his own chest so to speak. It is better than having two choices on a recommended list, incorrectly choosing the lesser of the two, experiencing a failure and wondering why no one warned him of the danger. As we all know the cost of correctly building these engines is extraordinary compared to any of the other engine choices we could have been made. To put those expensive components you bought at unnecessary risk when there was a way to avoid or mitigate the risk is counter intuitive.
If someone wishes to pursue the lesser fasteners for his build I want it to be a conscious decision that he has to make, rather than an accidental choice. That said the difference in performance between the six and twelve point nuts (in ARP Steel) is vanishingly small. The problem is when you loose a six point nut the intellectual leap to a six point nut from another source (for expedience) is too easy to make. The difference between the steel used in the locally sourced replacement and the steel used in the 6 and 12 pt hardware ARP offers is substantial. The lure of not having to wait to finish the assembly if I go to my local source can overcome good judgement.
Besides from a purely esthetic point of view you find six point nuts on trucks and 12 point nuts on race cars, aircraft and spacecraft
Possibly add the ARP 10mm bolt part number for the stock cams. And would the 200-8717 washer also work for the 10mm? This list is gonna save many members a lot of time searching great idea Ed.
Sure would be nice if ARP offered exhaust manifold/header studs, intake manifold bolts and other miscellaneous hardware. All the critical stuff is covered but none of the extras.
I saw that MMR sells ARP bolts for the oil pan but they don't list any kind of ARP part number with them. I know if is totally unnecessary but my stock bolts are all rusted over and it bothers me knowing that they are on a new engine.
I would check with ARP. I do not see any ARP pan bolts in their newest catalog. To my knowledge they do not have a pan bolt kit for the Modmotor.
p.s. I think that more significantly that the use of ARP fasteners for pan bolts begs the question, why would someone need a pan bolt made from a super steel? It does not make sense. I seriously doubt that ARP makes that fastener and it boggles the mind why a common grade 5 fastener would be in-adequate for the job.
You can just buy M8 bolts of varying lengths from ARP. Im sure these are the "oil pan" bolts your referring to.
Off the top of my head I would guess its a 30mm bolt.
Here is a good option for those - Click Here
I'm surprised this hasn't come up before, but I just tried sticking M12 cam bolts through a 200-8717 washer list right below the M12 cam bolts above and it doesn't begin to fit. I looked up the dimensions on the washer, 7/16" bore which comes out to .4375" 12mm converts to .4724". The closest thing I could find that had enough of an OD is a .250" thick .5" bore.
Next thing I did was dig through AJs build thread because I know these washers were covered in detail there. Sure enough, This is what AJ ordered:
Washer,with chamfer ARP-200-8749 ID-1/2" OD-2.00" Thickness-.250
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