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Topic: Exhaust manifold  (Read 2690 times) previous topic - next topic

Re: Exhaust manifold

Reply #50
And homemade works equally well/better.  50/50 ATF/acetone.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Exhaust manifold

Reply #51
Any theories on what would cause the exhaust manifold to break cleanly apart like that?  It's seemingly pretty stout material, so I would think not too easy to snap in half.

Perhaps caused by unequal torque applied to the mounting points, so the manifold is under constant stress.  Add to that the repeated heating and cooling cycles.  I can't see vibration being a factor, cuz the manifold doesn't normally "move around".

Or, is it a flaw in the casting.  I know nothing about metallurgy, so I'm clueless...but also curious.

Google says one theory is the weight of the turbo assembly hanging on the manifold is too much stress?

Also, anybody ever used Kroil?  I'm just filing away pertinent info for possible future projects.

Kroil - Best Penetrating Oil | Kano Laboratories, LLC



Cast iron parts just dont have a permanent life unlike ductle iron. Much less production costs and reasonable life make it a good product all in all. Lots of heat cycles and the weak point will always present itself eventually.
Scott

Re: Exhaust manifold

Reply #52
And homemade works equally well/better.  50/50 ATF/acetone.
Once you have worked years around turbo charged exhaust systems you will recognize the benefits of the Mouse Milk. Stupid name , magical product. Best applied while parts are at operating temperature. Cooling effect draws it in even better. Yes it is flammable but less than acetone.
Scott

Amazon.com: Mouse Milk Oil 8 Oz : Grocery & Gourmet Food

Amazon.com: Never-Seez NSBT-16N Silver Pure Nickel Special Anti-Seize...
As an Amazon Associate Foretravel Owners' Forum earns from qualifying purchases.

Re: Exhaust manifold

Reply #53
Gotta love that beer can tech.....I do hope  you drank it before using it!!
Mike in AL
2001 U295
8.3 ISC 350
Build 5918

Re: Exhaust manifold

Reply #54
Got the parts ordered, manifolds 214.00 Cummins wanted 1100.00, bolts spacers and gaskets 190.00, wastegate actuator 141.00 ( holset) part. We'll see how it goes together when it gets here
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Exhaust manifold

Reply #55
Amazon.com: Never-Seez NSBT-16N Silver Pure Nickel Special Anti-Seize..
For those who have never used this it works really good, the only caveat is when using always wear rubber globes and don't get it on you!
Chris
1999 U 320 DGFE
Build Number 5523
Chris & Elka Lang
In the field, Lonoke AR

Re: Exhaust manifold

Reply #56
Chris Lang, got it on order?👍
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Exhaust manifold

Reply #57

Mr. bbeane, What gave the broken exhaust manifold away? A typical exhaust leaking sound?? Thanks for the info. Mike
Mike & Donna Mariana + Angel & Rusty
2003 U295 3620
Build# 6118
2021 Jeep Wrangler 392

Re: Exhaust manifold

Reply #58
Amazon.com: Never-Seez NSBT-16N Silver Pure Nickel Special Anti-Seize..
For those who have never used this it works really good, the only caveat is when using always wear rubber globes and don't get it on you!
Chris
I can honestly say there were several co employees that refused to use the nickel anti seize and I got to the point that if I was following up on one of there installations I knew before I ever got started I would be in for a battle. I also made it a point when ever possible to assign them there own prior work. Eventually it made sense to them what a difference it made. One comes apart and one is fused together never to separate till complete failure of the bolt. Chris is correct 100% IMO.
Scott

Re: Exhaust manifold

Reply #59
Mr. bbeane, What gave the broken exhaust manifold away? A typical exhaust leaking sound?? Thanks for the info. Mike
  A couple of things. I do a pretty good check over before startup every travel day noticed a little soot around the turbo thought I had a bad gasket. Once we left all kinds of crazy engine codes, and my Silverleaf indicated lower than normal boost pressure.  So a closer inspection it was kind of hard to see with all the turbo plumbing in the way. I replaced some engine sensors last summer, in 12k mile have no check engine lights. So I'm going to assume that between the broken manifold and the hole in the wastegate actuator it was causing some conflicting signals to the ECM. We'll see when I get things back together.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country


Re: Exhaust manifold

Reply #61
If you live in the deep south, using nickel antisieze is as important as remembering to wear ones underwear!!

everything rusts down here. every bolt on every situation gets it in my shop. Even tiny #8/10 screws.
Mike in AL
2001 U295
8.3 ISC 350
Build 5918

Re: Exhaust manifold

Reply #62
My last 10 years was on production platforms in the gulf,guess what we used on every nut and bolt.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Exhaust manifold

Reply #63
New aftermarket manifold is much more robust than the original.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Exhaust manifold

Reply #64
Please post links and part numbers when you have it on and tested. Probably one in my future.
1998 36 foot U270 Build No. 5328 WTFE, 900 watts solar, Victron controller, B2B, bat monitor, 600 AMPH lithium with 2018 Chevy Colorado toad, SKP #110239, Motorcade #17781, 2021 Escape 17B for when Coach is broken down and campsites are too small, retired and full-timer since Dec. 2020. Part of RV family since 1963.


Re: Exhaust manifold

Reply #66
Considering the times were in in.....excellent looking part at a fair price. Aftermarket is always cheaper than OEM.


Mike in AL
2001 U295
8.3 ISC 350
Build 5918

Re: Exhaust manifold

Reply #67
Got everything back together. Everything went smoothly, no leaks. Took about 4 hours.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Exhaust manifold

Reply #68
That's pretty fast. Congratulations on diagnosis, limp home, removal, sourcing parts, and installation. That's an impressive resolution.
1998 36 foot U270 Build No. 5328 WTFE, 900 watts solar, Victron controller, B2B, bat monitor, 600 AMPH lithium with 2018 Chevy Colorado toad, SKP #110239, Motorcade #17781, 2021 Escape 17B for when Coach is broken down and campsites are too small, retired and full-timer since Dec. 2020. Part of RV family since 1963.

Re: Exhaust manifold

Reply #69
Well done Bud ^.^d
Andy & Eileen
MONTROSE COLORADO
1992 U300  40' 6V92 TA
2016 4 Runner
1998 Jeep Grand cherokee

1998 Jeep Grand Cherokee) Build # 4135 Skp# 122921

Re: Exhaust manifold

Reply #70
Bruce did all the hardware remove okay? Nice to have this put behind you. Looks good.
Scott

Re: Exhaust manifold

Reply #71
Bruce, (or some other Forum member)

Why do they use those long spacer tubes on the manifold bolts?  Why not just use shorter bolts?  Just curious...

1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Exhaust manifold

Reply #72
They keep the bolt tight during heating and cooling cycles and prevent breaking the bolts when the exhaust manifold expands.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Exhaust manifold

Reply #73
Yes ride went well, no CK engine lights. Boost seemed a little low 20-21 lbs, however that's on flat ground, and the coach is not pulling the Jeep. New turbo actuator is holset 3533135,a direct cross from Cummins number, supposed to be set at 34 lbs.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Exhaust manifold

Reply #74
Bruce,since the new manifold was beefier were the exhaust passages the same size as the old one?
96 U270 BUILD 4810
85 380SL
Drummonds TN.