Exhaust manifold

[leon]

So I degreased the motor, and my mechanic friend stole my truck truck while I was out of town and replaced the hemorrageing tappet cover gasket. He pointed out that I have a crack in my exhaust manifold, and showed it to me. 

That bumps up that repair to the top of the list. So I priced one at Orieley's and it's not too bad ($250ish). Are exhaust manifolds all the same, or should I stay away from the chain store part?

Any thing to watch out for, other than cracking bolts, etc?

[CTcummins24V]

If you can wait, look online for sales on 3 piece manifolds. They don't add power or performance, but a lot less prone to cracking. I got a 3 piece ATS manifold for under $300 a couple years ago when XDP had a sale.

[Silverdodge]

I also have a ATS 3 piece

[Mopar1973Man]

Hmmm... 15 years old and closing the gap on 300k miles and my stock OEM exhaust manifold still looks likes it new out of the box. Cracks? what cracks? 

[TFaoro]

5 hours ago, Mopar1973Man said:

Hmmm... 15 years old and closing the gap on 300k miles and my stock OEM exhaust manifold still looks likes it new out of the box. Cracks? what cracks? 

EGT's  

I liked my 3 piece other than it had a defect in the sealing surface and I had to have it machined when I sold it. 

I really really like my stainless. Yes they cost more, but to me it's worth it. 

[jlbayes]

The only manifolds you should be considering are stainless one piece. Had a cracked ats, not impressed.

[CTcummins24V]

4 hours ago, jlbayes said:

The only manifolds you should be considering are stainless one piece. Had a cracked ats, not impressed.

 

Daily driving/towing or sled pulling? What are you egts during a run? 

[dripley]

Going on 400k and no cracks. No sled pulling bud but some heavy towing.

[jlbayes]

11 hours ago, CTcummins24V said:

 

Daily driving/towing or sled pulling? What are you egts during a run? 

 

DD, drag racing, sled pulling. Never towed with it. Egts where as high as 1800* with it. It was fixed with braze once. And it was so hot enough times the braze displaced and settled. The stainless diesel manifold that replaced it, sees over 2k* with no signs of any issues. The only thing that annoys me is how long it takes to cool off.

[Macarena Man]

jlbayes ....... any photo's of your stainless manifold ?

Like a header ?

[TFaoro]

7 minutes ago, Macarena Man said:

 

 

Like this 

[Macarena Man]

Good looking manifold !

Thanks for the pic

[Silverdodge]

16 hours ago, jlbayes said:

 

DD, drag racing, sled pulling. Never towed with it. Egts where as high as 1800* with it. It was fixed with braze once. And it was so hot enough times the braze displaced and settled. The stainless diesel manifold that replaced it, sees over 2k* with no signs of any issues. The only thing that annoys me is how long it takes to cool off.

Are u on stock pistons or fly cut coated 

[jlbayes]

9 hours ago, Silverdodge said:

Are u on stock pistons or fly cut coated 

 

Stock. Coatings do not last at these heat levels. I would never fly cut either. Compression is a good thing.

Edited April 6, 2017 by jlbayes

[jlbayes]

On 4/5/2017 at 7:36 PM, Macarena Man said:

jlbayes ....... any photo's of your stainless manifold ?

Like a header ?

 

[leon]

Is there any reason to go stainless if the truck is stock?

[jlbayes]

There is no reason to change a manifold on a stock truck.

[Mopar1973Man]

11 minutes ago, jlbayes said:

There is no reason to change a manifold on a stock truck.

 

Absolutely true. Also, most daily driver trucks don't require upgraded manifold either.

 

Now performance trucks like TFaoro or Jlbayes now your talking another story these guys are pushing a lot of boost and lot of fuel and need the engine to breathe. Even with as much as I got my normal cruising boost pressure is still well below 10 PSI so I don't flow enough to even worry about upgrading nor worry about EGT's temps. Example 65 MPH I'm 2-3 PSI of boost and 550-600*F EGT's. This doesn't require an upgraded manifold. 

Edited April 18, 2017 by Mopar1973Man

[jlbayes]

Fwiw I've noticed zero difference when adding manifolds to the equation. Just ease of mounting turbochargers.

[leon]

10 hours ago, jlbayes said:

There is no reason to change a manifold on a stock truck.

Unless of course its cracked like mine…but I understand what you really meant :-)