View previous topic :: View next topic |
Author |
Message |
pockers Member
Joined: Mar 02, 2009 Posts: 46
|
Posted: Wed Sep 05, 2012 3:56 pm Post subject: M38a1 exhaust manifold gasket advice |
|
|
So just as show seaon finishes for the winter i get a noisey ticking sound from the engine - yup exhaust manifold gasket has blown
So new gasket and new brass nuts purchased ( old nuts stripped off when removed)
Manifold off - cleaned /scraped old gasket off - fitted new one and tightened up nuts
All seemed ok but lessthan 2miles now its blowing again - tightend nuts some more but still blowing from top middle
Face off manifoled is a bit pitted but not too bad(or so i thought)
So my question is -----
Do i try tightening the nuts some more - scared that i might strip nuts or worse snap the bolts?
Fit two gaskets?
Use a belt sander on the manifold to get rid of pitting?
Or a more sensible suggestion?
Thanks |
|
Back to top |
|
|
oilleaker1 Member
Joined: May 14, 2009 Posts: 972 Location: South Dakota
|
Posted: Wed Sep 05, 2012 5:13 pm Post subject: |
|
|
Go easy on the studs/nuts. A machine shop can plane your exhaust gasket surface so nice you won't believe it. You'll never fix it again after that. You don't want to snap off a stud------- John |
|
Back to top |
|
|
capescw Member
Joined: May 14, 2012 Posts: 150 Location: Milford CT
|
Posted: Wed Sep 05, 2012 10:14 pm Post subject: Torque specs |
|
|
I agree with Oilleaker re the machine shop instead of the belt sander (shudder-shudder), but the correct torque for the intake manifold is 15-20 foot/lbs, and 35-40 for the exhaust manifold (per Chiltons repair manual). Were you aggressive enough? _________________ "Frugality keeps me in the Game"
1952 M38 Project "Lazarus"
1951(?) M100 Trailer
1956-60 USAF Special Weapons Program
http://www.bill-capes.com/insanity - Updated 04/26/14 |
|
Back to top |
|
|
wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16355 Location: Wisconsin
|
|
Back to top |
|
|
pockers Member
Joined: Mar 02, 2009 Posts: 46
|
Posted: Sat Sep 15, 2012 3:11 am Post subject: |
|
|
Ok - found a local auto shop who were willing and able
Cost £40
Looking to try and fit it today (got a torque wrench too)
With regards the gaskets , do the metal rings insert into engine block or the manifold ? Manual says insert into exhaust port which I'm assuming is the engine block -
They are a v tight fit into engine block but just drop into manifold
Thanks |
|
Back to top |
|
|
oilleaker1 Member
Joined: May 14, 2009 Posts: 972 Location: South Dakota
|
Posted: Sat Sep 15, 2012 5:19 am Post subject: |
|
|
I put mine into the exhaust manifold because they wouldn't fit into the block. Have not had any problems. John |
|
Back to top |
|
|
|