Cerbera head bolts
Discussion
I searched high and low for these as I like to have the right tools for the job. They seem to be a Stateside thing; none readily available here. I eventually found a Mac Tools distributor who could bring them in among a stock order, then waited for an age, but here they are, all £60 worth:
I am happy to loan them out (to likeminded owners who will respect them and return them intact) for just the return carriage cost. PM me.
I am happy to loan them out (to likeminded owners who will respect them and return them intact) for just the return carriage cost. PM me.
You are correct, Sir, there is a formula for calculating the difference, taking into account the length of the torque wrench, the length of the tool and the relative angle between the two. Interestingly (or should I say, very conveniently...), when you put 90° into the equation, the difference becomes zero... 
TwinKam said:
You are correct, Sir, there is a formula for calculating the difference, taking into account the length of the torque wrench, the length of the tool and the relative angle between the two. Interestingly (or should I say, very conveniently...), when you put 90° into the equation, the difference becomes zero...
Thanks, yes I was trying to get my head round it, if you'll forgive the pun. When the torque wrench handle is in line with the stubby it effectively increases the length of the handle. I'm guessing the correction factor is H/( H + S*cos(a) ) where H is torque wrench handle length, S is the stubby length and a is the angle (zero being in line).
TwinKam said:
But sadly not all
IMHO you need a deep offset ring spanner, ideally something with a short shaft, but a long shaft is not a problem as long as you are accurate with the 90 deg angle
This will enable you to work with the really difficult inner 3-5 and 4-6 head nuts
Unfortunately I have probably done this more than most DIY mechanics, but obviously the pros have far more experience than me
Wonder whether anyone will chip in...
Edited by ukkid35 on Wednesday 25th July 20:31
ukkid35 said:
They look beautifully made and will probably work for most nuts/studs
But sadly not all
IMHO you need a deep offset ring spanner, ideally something with a short shaft, but a long shaft is not a problem as long as you are accurate with the 90 deg angle
This will enable you to work with the really difficult inner 3-5 and 4-6 head nuts
Unfortunately I have probably done this more than most DIY mechanics, but obviously the pros have far more experience than me
Wonder whether anyone will chip in...
A couple of people have made tools like this now, so if they have worked...But sadly not all
IMHO you need a deep offset ring spanner, ideally something with a short shaft, but a long shaft is not a problem as long as you are accurate with the 90 deg angle
This will enable you to work with the really difficult inner 3-5 and 4-6 head nuts
Unfortunately I have probably done this more than most DIY mechanics, but obviously the pros have far more experience than me
Wonder whether anyone will chip in...
Edited by ukkid35 on Wednesday 25th July 20:31
The 9 main ones are 15mm
The one hidden behind the timing cover is 14mm
The eight secondary are 12mm
That's per head
Also, my advice is ensure all washers are in place before doing anything, as there are three different sizes
Don't ask how I found out
The one hidden behind the timing cover is 14mm
The eight secondary are 12mm
That's per head
Also, my advice is ensure all washers are in place before doing anything, as there are three different sizes
Don't ask how I found out
Edited by ukkid35 on Monday 3rd September 13:35
Following Paul's comment that my offset drive rings might not work on all the head nuts, I've been looking for a double ended 3/8" sq offset drive so that it could be used to drive a socket, any socket.
Unfortunately no such tool exists!
But I've now bought an 11mm bi-hex one (from the same MAC range) that, with the double ended 3/8" sq lug, will do the job and drive any socket.
Let me know if you think you will need this too, Jhonno... how is yours coming on btw? Judging by the silence, I might beat you to it and need them first....
Unfortunately no such tool exists!
But I've now bought an 11mm bi-hex one (from the same MAC range) that, with the double ended 3/8" sq lug, will do the job and drive any socket.
Let me know if you think you will need this too, Jhonno... how is yours coming on btw? Judging by the silence, I might beat you to it and need them first....
TwinKam said:
Following Paul's comment that my offset drive rings might not work on all the head nuts, I've been looking for a double ended 3/8" sq offset drive so that it could be used to drive a socket, any socket.
Unfortunately no such tool exists!
But I've now bought an 11mm bi-hex one (from the same MAC range) that, with the double ended 3/8" sq lug, will do the job and drive any socket.
Let me know if you think you will need this too, Jhonno... how is yours coming on btw? Judging by the silence, I might beat you to it and need them first....
Unfortunately no such tool exists!
But I've now bought an 11mm bi-hex one (from the same MAC range) that, with the double ended 3/8" sq lug, will do the job and drive any socket.
Let me know if you think you will need this too, Jhonno... how is yours coming on btw? Judging by the silence, I might beat you to it and need them first....
I've to wait 2 months for my cams to arrive! They came 2 weeks ago, now I've been waiting for shims.
I am finishing the head shimming tonight, and hopefully bolting the heads on this weekend coming! I've been meaning to drop you an e-mail!
Edited by Jhonno on Monday 8th October 14:09
Edited by Jhonno on Monday 8th October 14:10
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