Exhaust Manifold: Hex or Allen bolts?

[Boostian]

I'm ordering exhaust manifold bolts from Allen Boltz. For those of you that upgraded to stainless steel ones, did you go Allen or Hex? I would think Allen would give a bit more room to tighten. Also, did anyone use lock washers instead of the ones supplied?

 

[dynoman]

Mine are mixed depending on location , because some are easier with a 12pt. box end wrench than with allen heads .

 

[Boostian]

Did you use lock washers?

 

[Nasty Wendy]

Have you considered studding the intake? It works well.

 

[Boostian]

Have you considered studding the intake? It works well.

Studding the intake for the exhaust manifolds?

 

[dynoman]

Did you use lock washers?

Yes , also I have a lift so it's easier to get to all of the bolts for retorqueing after a few heat cycles .

 

[NY Twin Turbo]

Exhaust manifold? Aluminum heads? I used studs with hex bolts and lock washers. All stainless.

 

[Nasty Wendy]

Studding the intake for the exhaust manifolds?

Sorry Boostian, I guess I should limit my midnight postings. I thought you were talking about bolts for the intake manifold. Can't say I've studded the exhaust manifolds but I can't say I wouldn't try it either.

 

[NY Twin Turbo]

I knew I might re-torque my header nuts from time to time. Also I fabbed up my own headers, so they came on and off a hundred times during the process. I sometimes don't know when that last quarter turn on a bolt is too much. So, I used studs to avoid stripping the threads in the aluminum heads.

 

[Boostian]

These are stock iron heads for now. I was leaning towards stainless Allen bolts and lock washers

 

[NY Twin Turbo]

These are stock iron heads for now. I was leaning towards stainless Allen bolts and lock washers

Oh. Also I forgot. You may not be able to use studs anyway if you still have the factory air box. I don't think you could slip the header on and over the studs for removal and install.

Anyone want to chime in on this? It's been a long time since I had a factory set-up. I don't remember.

 

[earlbrown]

I'm ordering exhaust manifold bolts from Allen Boltz. For those of you that upgraded to stainless steel ones, did you go Allen or Hex? I would think Allen would give a bit more room to tighten. Also, did anyone use lock washers instead of the ones supplied?

I run my Stainless Allens on my engine. The back PS bolts are tight due to the heater box but the rest of them are just as easy to R&R a the stock bolts.


Is the kit you're looking at the same as the alloyboltz guy on Ebay?

 

[Boostian]

I was looking direct from the site

 

[earlbrown]

Might want to do some research on his kits. From what I've read his don't fit perfectly and I believe he uses substandard Chinese bolts.

I was going to get some of his bolts back when I was building my 4.1 and the pictures didn't quite match up with what my stock bolts looked like laid out. I did a search and found quite a few posts where people had bought from him and the kits didn't fit. That's why I went to the trouble to build my own kits.