cylinder head nut and bolt touqe

[bondy]

hi all just puting me 199A 350 motor back in the frame just wounderd if anybody knows if any what touqe setin is the cylinder head nuts and bolts? ive got the manual but dosent say

[pschrauber]

Haven't we had this somwhere as a thread already?

Here a copy of the repair and maintance manual:

The sequence which nut or screw you have to mount is prescribed in this picture.

The torque stepping to max torque is 3 Nm.

Nut and screw #07 and #08 is up to 18 Nm torque,

while the others get 15 Nm.

Use some grease like "never-seeze" so the bolts and nuts turn smooth.

[john collins]

Take care with the nuts 7 & 3 in dia - and also 3 & 4 for that matter

While the other nuts fit to the steel studs running through to crankase , the ones above are threaded directly into barrel, and and as this is in reality a helicoil ( or such) threaded into alloy, it is easy to strip

Personally I think you will have no trouble if you just tighten these without the torque wrench - I just use a normal 1/2 inch socket on a normal T bar.

Do not swing on the end of thing with all you might - but you can tighten more or less as you would any other bolt on engine etc - and just nip it up a little at end

I know this may not sound correct in pure engineering practice - but it has worked for me for 40 yrs now - and probably hundreds if not thousands of motors , and gives no problem. A bit of a tribute to Bultaco I think that the heads rarely if ever give any leakage/trouble

[bondy]

Haven't we had this somwhere as a thread already?

Here a copy of the repair and maintance manual:

The sequence which nut or screw you have to mount is prescribed in this picture.

The torque stepping to max torque is 3 Nm.

Nut and screw #07 and #08 is up to 18 Nm torque,

while the others get 15 Nm.

Use some grease like "never-seeze" so the bolts and nuts turn smooth.

thanks for the photo ill just do it as you say with out the torque im having the barrol helicoiled cheers bondy