Jump to content


Photo
- - - - -

Cylinder Head Retorque


Best Answer Moke Spider , 10 September 2019 - 06:28 PM

I too re-torque after the first heat cycle and then again at 1000 km (600 miles).

 

I always work one nut at a time, backing it off, lubing the threads and nut face, then re-torquing.

 

Remember, these are done 'wet' (oiled).

 

,,,,,,,,, do you re tighten the head with the engine cold or hot?

 

Iron Heads are done cold and Alloy Heads hot.

Go to the full post


  • Please log in to reply
12 replies to this topic

#1 croc7

croc7

    Mini Mad

  • TMF+ Member
  • PipPipPipPip
  • 130 posts
  • Location: Tacoma, Washington

Posted 10 September 2019 - 03:01 AM

Torqued the head nuts after head gasket replacement (AF407) and again after 20 minute run to operating temperature. Any reason to torque again, say after 500 miles?

Edited by croc7, 10 September 2019 - 03:09 AM.


#2 InnoCooperExport

InnoCooperExport

    Mini Mad

  • TMF+ Member
  • PipPipPipPip
  • 193 posts
  • Location: Netherlands
  • Local Club: Mini Seven Club Nederland

Posted 10 September 2019 - 07:14 AM

I would yes. I think general recommended interval after having them off is a couple hundred miles. And no harm to it is there

#3 MiniMadRacer

MiniMadRacer

    Mini Mad

  • Noobies
  • PipPipPipPip
  • 108 posts
  • Location: Essex

Posted 10 September 2019 - 08:10 AM

I assume you "snap" the nuts off a little then re - torque (I always do), and one at a time in the correct sequence



#4 MiniMadRacer

MiniMadRacer

    Mini Mad

  • Noobies
  • PipPipPipPip
  • 108 posts
  • Location: Essex

Posted 10 September 2019 - 09:02 AM

I also loosen the Rad cap before doing it to relieve any residual pressure in the water / coolant system to reduce any likely hood of it "blowing" past the gasket



#5 Chris1275gt

Chris1275gt

    On The Road

  • TMF+ Member
  • PipPip
  • 45 posts
  • Location: Reading

Posted 10 September 2019 - 11:28 AM

I have to do that after an engine rebuild and after 500 miles do you re tighten the head with the engine cold or hot?

#6 MiniMadRacer

MiniMadRacer

    Mini Mad

  • Noobies
  • PipPipPipPip
  • 108 posts
  • Location: Essex

Posted 10 September 2019 - 11:47 AM

I always do it cold, and I mean cold, ie a good few hours or so after turning the engine off



#7 Steve220

Steve220

    Up Into Fourth

  • Members
  • PipPipPipPipPipPipPipPipPip
  • 3,898 posts
  • Location: Shropshire
  • Local Club: RAF Mini Club

Posted 10 September 2019 - 02:29 PM

I usually do it the morning after.

#8 nicklouse

nicklouse

    Moved Into The Garage

  • TMF+ Member
  • PipPipPipPipPipPipPipPipPipPipPip
  • 12,531 posts
  • Location: Not Yorkshire
  • Local Club: Anonyme Miniholiker

Posted 10 September 2019 - 02:35 PM

I torque them up. warm up retorque and then get back on the track. non of this better let it cool down as there is no time.



#9 Moke Spider

Moke Spider

    Crazy About Mini's

  • TMF Team
  • PipPipPipPipPipPipPipPipPipPip
  • 9,152 posts
  • Location: NSW
  • Local Club: South Australian Moke Club

Posted 10 September 2019 - 06:28 PM   Best Answer

I too re-torque after the first heat cycle and then again at 1000 km (600 miles).

 

I always work one nut at a time, backing it off, lubing the threads and nut face, then re-torquing.

 

Remember, these are done 'wet' (oiled).

 

,,,,,,,,, do you re tighten the head with the engine cold or hot?

 

Iron Heads are done cold and Alloy Heads hot.



#10 croc7

croc7

    Mini Mad

  • TMF+ Member
  • PipPipPipPip
  • 130 posts
  • Location: Tacoma, Washington

Posted 11 September 2019 - 01:35 AM

Thanks for the input.

#11 Rorf

Rorf

    Super Mini Mad

  • Members
  • PipPipPipPipPipPip
  • 697 posts
  • Location: Cape Town

Posted 11 September 2019 - 05:21 AM

I have to do that after an engine rebuild and after 500 miles do you re tighten the head with the engine cold or hot?

 

I would say the best answer is from Moke Spider, Chris 1275gt did not answer the question fully :ohno:



#12 DeadSquare

DeadSquare

    One Carb Or Two?

  • Members
  • PipPipPipPipPipPipPip
  • 1,443 posts
  • Location: Herefordshire
  • Local Club: Herefordshire Motor Club

Posted 11 September 2019 - 07:01 AM

I wouldn't have divulged this years ago, but it won't get anyone into trouble now.

 

When the new car went in for its free 500 mile service, it was very common practice in the trade for the studs on the probably still warm engine, to be torqued on down to 45 ft/lbs.


Edited by DeadSquare, 11 September 2019 - 07:02 AM.


#13 Chris1275gt

Chris1275gt

    On The Road

  • TMF+ Member
  • PipPip
  • 45 posts
  • Location: Reading

Posted 11 September 2019 - 09:40 AM

I have to do that after an engine rebuild and after 500 miles do you re tighten the head with the engine cold or hot?

 
I would say the best answer is from Moke Spider, Chris 1275gt did not answer the question fully :ohno:

I agree.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users

Mini Spares