Allis 7020 exhaust manifold
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=184849
Printed Date: 14 Oct 2025 at 5:20am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Allis 7020 exhaust manifold
Posted By: captaindana
Subject: Allis 7020 exhaust manifold
Date Posted: 29 Nov 2021 at 4:58am
|
Project next. I’m replacing the exhaust, turbine, exhaust elbow and muffler on the old girl. Are there any words of wisdom before trying to remove the exhaust manifold? I put the 5/8 half inch drive socket on one of the studs yesterday and of course it didn’t move. Thanks. Dana ------------- Blue Skies and Tail Winds Dana |
Replies:
Posted By: DrAllis
Date Posted: 29 Nov 2021 at 6:10am
| If the exhaust gaskets aren't leaking, leave them alone and change the turbo?? where it sits. A torch will be needed to melt the 4 turbo mtg bolts. Use no lock washers. 7010/20's are famous for having LOOSE exhaust manifold bolts (not studs) from that big heavy muffler. A straight pipe is easier on them. |
Posted By: captaindana
Date Posted: 29 Nov 2021 at 7:18am
|
Thanks Doc. The exhaust manifold by number one is cracked right in half as far as the exhaust gasket they look fine I have a new pipe to put on and a new turbo to put on but now I see the manifold on number one is broken clear through at least it appears so ------------- Blue Skies and Tail Winds Dana |
Posted By: captaindana
Date Posted: 29 Nov 2021 at 7:23am
 ------------- Blue Skies and Tail Winds Dana |
Posted By: DrAllis
Date Posted: 29 Nov 2021 at 7:35am
| Well, that changes everything!! Get the engine good and hot, up to operating temps. Shut it down and take a 1/2" impact and gently rattle on those rusty bolts and they should come loose while the head is warmed up. |
Posted By: captaindana
Date Posted: 30 Nov 2021 at 7:40am
|
Fast forward six hours later we got five studs out the last one broke off I had to TIG weld the washer and nut on the broken stud got that out everything is just waiting now on new manifold bolts from Sandy Lake. ------------- Blue Skies and Tail Winds Dana |
Posted By: Ed (Ont)
Date Posted: 30 Nov 2021 at 7:54am
| Good job! Keep that up and you will have to hang a new shingle on shop wall. |
Posted By: IBWD MIke
Date Posted: 30 Nov 2021 at 8:49am
|
That's good news Captain. Those manifold studs cause a lot of consternation! |
Posted By: captaindana
Date Posted: 30 Nov 2021 at 3:04pm
|
They were a genuine FPITA! ------------- Blue Skies and Tail Winds Dana |
Posted By: AC7060IL
Date Posted: 13 Apr 2022 at 9:00am
|
Posted By: AC7060IL
Date Posted: 13 Apr 2022 at 9:02am
|