M1009 Exhust system

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Small Prepper

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Gernantown, MD
Evening ALL

Well my Exhust system finally started failing. I have been really lucky.
It's looks like the original system from 1985 ( not 100% sure) and I got almost 60k on truck. The truck came out of NY national guard unit. I picked up a complete system from O'reilly's for just over $300.00. With new manifold studs, clamps, o rings, hangers, mufflers, and pipes.

OK, a couple of questions:

1) Is it possible to be the original system?
2) I know it has a galvanizing coating on the pipes, Would it be worth to paint it with high heat paint to give it longer life?
3) What is the temperature coming off the manifolds?
4) Would high heat paint from auto stores work?
5) When replacing system, Has anyone have a lot of problems with the manifold studs? Breaking or stripped/stripping?

Thanks
S.P.
 

nyoffroad

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Studs do and will break, PIA but you do what you have to. I've used 3M spray galvanize made as a weld-thru primer, it's not cheap and has a LOT of zinc that means you have to shake and then shake it some more. I believe it helps it last but my exhaust seems to rust from the inside.
 

cucvrus

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DSCF6354.jpgDSCF6355.jpgDSCF6358.jpgDSCF6360.jpg5) When replacing system, Has anyone have a lot of problems with the manifold studs? Breaking or stripped/stripping?
If this is a concern. I would not worry. Do you have access to an oxygen / acetylene torch. If so the 9/16" nuts on the 3/8" studs will be a breeze. This is one of my customers snow plow trucks. Everything on it is as rusty as can be. I was able to remove the nuts from this manifold with a torch and a spray of ice water. Worked every time. Go slow and heat as you go. If it gets tight apply more heat. Bright red gets it done.
If corrosion is such a concern. May I suggest you consider the stainless steel mandrel bent pipes. Makes a nice job all around. Of course it is more expensive. But really how long do you expect to be painting and cleaning an exhaust system. It will rust no matter what. I had an M1009 with Stainless steel exhaust. Good Luck. Be Safe.


 
Last edited:

joshuak

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Slower shore, DE
...

1) Is it possible to be the original system?
2) I know it has a galvanizing coating on the pipes, Would it be worth to paint it with high heat paint to give it longer life?
3) What is the temperature coming off the manifolds?
4) Would high heat paint from auto stores work?
5) When replacing system, Has anyone have a lot of problems with the manifold studs? Breaking or stripped/stripping?

...
My 2cents,

1) Yes
2) If it's worth it to you, give it a shot.
3) I've seen up to 1100 f on my EGT, I've read above that any higher than 1200 f and you start melting stuff, YMMV.
4) That's what I used, I suggest you read the instructions there is a recommended heating/cooling curing procedure.
5) Prepare for the worst, hope for the best. Letting the parts soak in the rust buster of your preference for a couple of days in advance always helps, that and some good vice grips. I like acetone and ATF at 50/50. Put a few drops on each stud each time you remember.


IMG_0987.jpg
 

joshuak

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Hey SP, your talking about painting your new exhaust right? If not I totally agree with cucvrus edit. Not worth the time on an old system

I started with a kit.

IMG_0915.jpg

Stainless, probably an overkill but sure would be nice .
 

MarcusOReallyus

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Virginia
Studs do and will break, PIA but you do what you have to. I've used 3M spray galvanize made as a weld-thru primer, it's not cheap and has a LOT of zinc that means .
That means you should not be welding it. Zinc and welding are a deadly combination. Proper weld-through primers are very low zinc for that reason.
 

cucvmule

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1979 When I was doing heavy industry demolition that required cutting, burning of large galvanized duct work we were required to take milk breaks to help with getting the zinc out of our body.

Purely preventative measure we were told. WRONG! I want this to be a warning that zinc poisoning is very deadly and no amount is safe. I was in the hospital for 2 days. After you have had it just the faint smell of burning zinc makes me ill.
 
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