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captaindana 
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Joined: 14 Sep 2009
Location: Fort Plain, NY
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 Topic: Allis 7020 exhaust manifold
Posted: 29 Nov 2021 at 4:58am |
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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
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Blue Skies and Tail Winds
Dana
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DrAllis
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Joined: 12 Sep 2009
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Posted: 29 Nov 2021 at 6:10am |
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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.
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captaindana
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Location: Fort Plain, NY
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Posted: 29 Nov 2021 at 7:18am |
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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
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Dana
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captaindana
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Posted: 29 Nov 2021 at 7:23am |
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Blue Skies and Tail Winds
Dana
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DrAllis
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Posted: 29 Nov 2021 at 7:35am |
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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.
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captaindana
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Posted: 30 Nov 2021 at 7:40am |
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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.
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Dana
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Ed (Ont)
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Joined: 08 Nov 2009
Location: New Lowell, Ont
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Posted: 30 Nov 2021 at 7:54am |
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Good job! Keep that up and you will have to hang a new shingle on shop wall.
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IBWD MIke
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Location: Newton Ia.
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Posted: 30 Nov 2021 at 8:49am |
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That's good news Captain. Those manifold studs cause a lot of consternation!
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captaindana
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Posted: 30 Nov 2021 at 3:04pm |
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They were a genuine FPITA!
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Dana
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AC7060IL
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Posted: 13 Apr 2022 at 9:00am |
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AC7060IL
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Posted: 13 Apr 2022 at 9:02am |
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