Broken exhaust manifold studs

TwinStick · Post by **TwinStick** » Fri Jul 24, 2015 12:39 am

So, exactly what is the part # for ARP high strength CroMo replacement bolts ?????????????????????????

Post by **Cactus Red** » Fri Jul 24, 2015 8:00 am

They don't make any at all.

Dennis Miller "You can't order black coffee anymore. It's un-creamed..."

TwinStick · Post by **TwinStick** » Sat Jul 25, 2015 12:03 am

Then what are these ???

http://www.manciniracing.com/arpchhebokit.html

http://www.manciniracing.com/enchhebokit5.html

Would they work ? Manifolds are not exactly headers but don't they bolt to block in the same place ?

FirerescuePW · Post by **FirerescuePW** » Sat Jul 25, 2015 8:09 am

The manifold studs and bolts are several different lenghts on our motors. Some of them are double-ended, with a stud protruding from the head to mount heat shields and other accessories.

The bolts in a typical header kit are all the same length. You need the OEM lengths for 2 reasons- the manifold casting thickness is not the same at each hole by design, and the hole in the head is blind, so if you use a bolt the is too long it will bottom out.

Mr.Smith · Post by **Mr.Smith** » Mon Jul 27, 2015 3:01 pm

Here's what ours look like...

Mr.Smith · Post by **Mr.Smith** » Mon Jul 27, 2015 3:05 pm

Invoice with part #'s...

SnakeEyes · Post by **SnakeEyes** » Mon Jul 27, 2015 8:32 pm

So why couldn't a guy just get good bolts that are all the same size as stock just a better quality and ditch the heat sheild or mount it another way

Mr.Smith · Post by **Mr.Smith** » Mon Jul 27, 2015 11:23 pm

I suppose you could, if you(truly)ceramic coat the exhaust manifolds to eliminate the need for a heat shield...
I was only showing the stock setup for comparisons, hahaha!

Ducky's Dad · Post by **Ducky's Dad** » Mon Jul 27, 2015 11:52 pm

Those bolts are an odd mix of configurations, so probably hard to match up without going through a Dodge parts department. I have not seen it, but was told there is a TSB that specifies "do not use anti-seize." Was also told that the new bolt pack from the dealer contains better bolts than what they used in '05. True? Who knows?

My truck now has all new exhaust bolts on the passenger side and a new exhaust manifold. My original had a slight warp to it and did not want to seat properly, cured by a new $140 casting. And I still have the complete set of driver's side bolts for the next failure. Damn truck is getting expensive.

Mr.Smith · Post by **Mr.Smith** » Tue Jul 28, 2015 9:18 pm

Header options??? Who's the best in your opinion/s Sirs. This & ARP hardware...

Colibri · Post by **Colibri** » Tue Jul 28, 2015 9:23 pm

Recently had to deal with this myself, one broken on each head. Removed manifolds and soaked the broken studs in kroil then reverse drill and easy outs. Was only a few hours of work. Since they were off I had the manifolds and heat shields ceramic coated. Can hold my hand an inch away from the darn thing while it's running now, made a huge difference.

Colibri · Post by **Colibri** » Tue Jul 28, 2015 9:25 pm

If you're going to do headers skip arp and do stage8 locking fasteners. They have them specifically for the hemi.

05PWrockcrawler · Post by **05PWrockcrawler** » Wed Jul 29, 2015 7:52 pm

I agree with him ^^^^^^^^

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05PWrockcrawler · Post by **05PWrockcrawler** » Wed Jul 29, 2015 7:54 pm

Colibri wrote:If you're going to do headers skip arp and do stage8 locking fasteners. They have them specifically for the hemi.

Did you use them when u installed your manifolds? Any issues and who did u order them from? Thanks

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Colibri · Post by **Colibri** » Wed Jul 29, 2015 11:19 pm

I just used the newer oem hardware because the cast flange is much thicker than a header flange. You can order straight from them or jegs/summit etc. I use stage8 spindle nuts on my hub conversion and it's 1000x better than anything else. They make really good stuff

Mr.Smith · Post by **Mr.Smith** » Thu Jul 30, 2015 11:17 pm

Awesome...well done Sir!

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Broken exhaust manifold studs

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