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Exhaust manifold rehab
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ndnchf View Drop Down
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    Posted: 09 Sep. 2019 at 12:26am
A jeep buddy gave me an original exhaust manifold to replace the damaged one on my jeep. The heat riser shaft was frozen and the exhaust pipe bolt and stud nut looked challenging. But a couple days if soaking with penetrating oil, then gentle tapping on the shaft got it loosened up. After bead blasting and a little love, it rotates easily. I only had to make a new key to align the arm to the shaft properly.

To my surprise, the exhaust pipe bolt/nut and stud nut came off pretty easily. The stud nut was brass, which really helped. 

After it was all cleaned up, it was coated with Eastwood's cast iron exhaust coating. I've had good luck with it before. It we I'll go on the shelf until I'm ready to change it out.
1948 CJ2A - It goes nowhere fast, but anywhere slow.
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Gil View Drop Down
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Points: 975 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Gil Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep. 2019 at 1:39am
Thumbs UpLooking good 
1946 cj2a 59108
1998 Jeep Cherokee 2 doors
2016 Jeep Cherokee TrailHawk
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Points: 517 		Post Options Post Options   Thanks (0) Thanks(0)   Quote willyt Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep. 2019 at 2:34pm
You might want to use a straight edge to check the face of the manifold for warping, also check the intake manifold.
1952 CJ3A (Lil'Green)
early M38A1(Ole Green)
1970 Jeepster Commando
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ndnchf View Drop Down
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Points: 2177 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ndnchf Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep. 2019 at 3:08pm
Originally posted by willyt willyt wrote:

You might want to use a straight edge to check the face of the manifold for warping, also check the intake manifold.

Good point. I did and it is nice and straight. I'll check the intake when I remove it to do the swap.
1948 CJ2A - It goes nowhere fast, but anywhere slow.
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srlbotanical View Drop Down
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Points: 395 		Post Options Post Options   Thanks (0) Thanks(0)   Quote srlbotanical Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep. 2019 at 3:48pm
Thanks for the pictures. I'm getting ready to do this to mine as well. I'm hopeful I can free up the heat riser as well.
Steve
1948 CJ2A - The Good Dog
1997 TJ - The Trail Rig
2001 XJ - The kids ride
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Points: 2177 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ndnchf Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep. 2019 at 4:55pm
I found that glass beading around the shaft/flap on the inside helped by removing the carbon buildup. That was causing some binding as well.  Good luck.
1948 CJ2A - It goes nowhere fast, but anywhere slow.
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Greaser007 View Drop Down
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Points: 850 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Greaser007 Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep. 2019 at 5:57pm
   I am wanting to separate a manifold set.

Did you apply heat before attempting to remove the 4-attachment bolts ?
(the one's holding the intake to exhaust).

Any recommended method for removing the bolts without breaking them ?

   Len
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ndnchf View Drop Down
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Points: 2177 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ndnchf Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep. 2019 at 6:39pm
Originally posted by Greaser007 Greaser007 wrote:

   I am wanting to separate a manifold set.

Did you apply heat before attempting to remove the 4-attachment bolts ?
(the one's holding the intake to exhaust).

Any recommended method for removing the bolts without breaking them ?

   Len

I haven't got that far yet.  But I would expect that heating the intake around the bolts with a torch would be beneficial.  So would a couple days application of penetrating oil.  I'd be glad to hear other's experience do it.
1948 CJ2A - It goes nowhere fast, but anywhere slow.
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JeepSaffer View Drop Down
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Points: 1181 		Post Options Post Options   Thanks (0) Thanks(0)   Quote JeepSaffer Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep. 2019 at 7:21pm
Originally posted by Greaser007 Greaser007 wrote:

   I am wanting to separate a manifold set.

Did you apply heat before attempting to remove the 4-attachment bolts ?
(the one's holding the intake to exhaust).

Any recommended method for removing the bolts without breakin0g them ?

   Len

Edited because i was being dumb.....


Edited by JeepSaffer - 09 Sep. 2019 at 7:23pm
1948 CJ2A #204853 in South Africa
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