Exhaust manifold woes...

[truckmen]

Hello again all,

Has anyone attempted the exhaust manifold gasket replacement on our 6.7s? I heard that they have weak manifold-to-head bolts and that there is a fix by upgrading those bolts. I also heard it us a bear of a job to do and one shop told me it is at least 15 hours labor that could be more if the head has to be pulled to get broken bolts out.
I'm bracing myself for this in my very near future.

 

[sag2]

From my experience there have been very few manifold gasket failures. Where did you hear it from?

 

[Newsa]

Manifold to head bolts and gaskets?
Do they get too hot? And stretch due to excessive heat?

Some people stretch their head to block bolts by adding fuel (tune) and upgrading their turbo. Although it sounds to be rare?

If you want to replace them for your own peace of.mind????? See if you can replace the bolts one at a time so the other bolts keep pressure on the gasket. Maybe if the seal isn't broken, the gasket will still be good & it will cost less labor?

Since you are running a g56 I doubt you would need these uogrades. You would destroy your transmission before you would reach the same torque and hp that the Aisin equipped trucks have?

 

[truckmen]

From my experience there have been very few manifold gasket failures. Where did you hear it from?

My mechanic. Or should I say, the son of a close friend of my father-in-law...really!

He said they - those bolts in the 6.7 Cummins exhaust manifold-to-head have been prone to failing at the rear of the head/manifold and the rear-most bolts are the most difficult to get to, always seem to break and once broken are very difficult to remove as they keep breaking when trying to get a tool on them for removal out of the head to be replaced by stronger bolts. He also stated that it is at least 15 hours labor for this job and that only if the head does not have to be removed.

When they replaced my turbo actuator 2 weeks ago (for a total sum of $2,967.00) they saw a lot of soot on the side of the engine at the back.

 

[Newsa]

My mechanic. Or should I say, the son of a close friend of my father-in-law...really!

He said they - those bolts in the 6.7 Cummins exhaust manifold-to-head have been prone to failing at the rear of the head/manifold and the rear-most bolts are the most difficult to get to, always seem to break and once broken are very difficult to remove as they keep breaking when trying to get a tool on them for removal out of the head to be replaced by stronger bolts. He also stated that it is at least 15 hours labor for this job and that only if the head does not have to be removed.

When they replaced my turbo actuator 2 weeks ago (for a total sum of $2,967.00) they saw a lot of soot on the side of the engine at the back.

Yeah.

Makes me wonder if that flash for the ECM would help your soot condition. Just a thought.

 

[truckmen]

Good morning, Newsa!

Hey, thanks for the reminder. I'm enroute to MT to deliver 4 cars finaling in Butte I think I'll call tomorrow to see if I can get into a place there (in Butte). It was mentioned that I must go to an FCA-approved location - and not just any Ram dealer) for that flash, is that correct?

Also, EGR servicing was never done on this engine now with 212,000 miles on it due in part to my ignorance of having to do this. Geno's Garage has a kit regarding this if I am not mistaken and, if I understand it correctly, is something I should be doing as well. Is there a correlation to all of this?