RE: Retorquing heads etc.

["Minor, Bob" <Bminor@xxxxxxxx>]

Use the head bolt nut as a guide (opposite corners are 180 degrees apart) and mark the 90 and 189 stopping points on the head itself with a felt pen.  It's very accurate if you're careful.

By the way, if you're trying to stop an oil leak and you have the old head gaskets, it won't stop leaking until you replace them with the newer design.  With a '99 however, you should have the new gaskets.  Maybe it will correct the problem, if not, complete head gasket replacement is not that tough. 

  
- -----Original Message-----
From: owner-oilheads@xxxxxxxxx [mailto:owner-oilheads@xxxxxxxxx]On
Behalf Of Tom Brown
Sent: Sunday, July 25, 2004 6:43 PM
To: BMW Oilhead List
Subject: Retorquing heads etc. 


Guys:

Mark has it right.   You don't want to loosen all the bolts at once if
you're re-torquing.   That would be very bad, allowing oil to escape from
the passages etc.  Just one bolt at a time.

For replacing a head that's been removed, you have to use a new gasket and
follow the 90 degree/90 degree procedure.   I see no reason for an angle
gage.  Put the wrench at 12 oclock and go to 3.  Done deal.

- -TB


>From: Marco S Hyman <marc@xxxxxxxxx>
>Subject: Re: Oilhead cylinder torque

>Commenting on various messages...

 >> This snippet below indicates to me that we should be torquing to 20 Nm
and
 >> doing 1 pass over all of the nuts turning 90 degs. and a second pass
over
 > >all of the nuts turning another 90 degrees.  That is different from
torquing

>That's the procedure when installing a head.  The procedure is different
>for retorquing.  To retorque you back off one nut, torque to 20 Nm,
>add 180 degrees, then procede to the next nut in a cross-wise pattern.

 >> These gaskets are not meant to be retorqued. If you are sure the leak is

>If the head has been removed, yes... replace the gasket.   However
>retorquing is required about 600 M (1000 Km) after installing a head
>and is part of the 600 Mile/1000 Km service on a new bike (third item
>on the BMW official checkoff sheet).

>// marc

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