oil pump and chain tensioner torque

robs ss said:
The numbers Les quoted above are also as per OldBritts torque tables
Click to expand...

That's what I was quoting from.

John Hudson in his engine rebuild video said 100 inch pounds (8.3333 lbs ft.) was plenty.
 
Last edited:
I tried 15 as the manual said and one nut felt mushy as I was tightening it and the stud will require a helicoil. I made a drill guide last night and a set of junk cases to practice on.
 
seattle##gs said:
I tried 15 as the manual said and one nut felt mushy as I was tightening it and the stud will require a helicoil. I made a drill guide last night and a set of junk cases to practice on.
Click to expand...
If it's pulling out at 15 then the thread in the cases was crap.
How low are you going to go for the same diameter nuts/studs, threaded into alloy, under the exhaust ports, holding the head down? Manual says 20 ft.lb - is that too high for you?
In my view, if you have to helicoil to safely get to recommended torque, so be it.
Cheers
 
Who knows what damage some previous owner did to the threads in the last 50 odd years? It is good practice to stop tightening if you feel something is not right and who among you has ever checked their torque wrench for accuracy?
The fastener manufacturers torque tightening figures relate to the particular fasteners strength, not the strength of the material they are screwed into. Studs used in cast aluminium tend to have coarser threads in the aluminium than at the nut end which further complicates things.
Sorry if I am stating tho obvious or preaching to the converted.
 

Similar threads

J
Cam chain tensioner
2
Replies
22
Views
2,344
ludwig
ludwig
Dan1950
Rubber Faced Chain Tensioner?
Replies
7
Views
1,032
Stephen Hill
S
R
  • Locked
Camshaft chain tensioner backing plates - is it thin or thick?
Replies
9
Views
1,158
rwanz
R
P
  • Locked
Primary chain tensioner blade
Replies
5
Views
2,112
pierodn
P
Fast Eddie
Primary chain tensioner blade failure...
Replies
5
Views
1,854
dantriumph
dantriumph
Back
Top