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        General >> Give/Need advice to/from others >> torquing the head bolts!
        
(Message started by: ro284 on Jan 14^th, 2011, 10:21am)

Title: torquing the head bolts!
Post by ro284 on Jan 14^th, 2011, 10:21am

Well having looked at changing the head 2-3 -16v i am still unsure about this procedure, on the new bolt pack box, it reads, 6 stages. in sequence.
1 tighten to 18lb -25 N/m
2 tighten to 40lb-55N/m
3 slacken 90 deg. 1/4 turn,
4 tighten to 40lb 55Nm
5 Tighten 1/4 turn
6 tighten 1/4 turn
On the pdf diagram, it reads bolt no1- 21-167 (i realise this is the torque spanner size!) then 40Nm. then 55 Nm.
Could someone advise please, my concern is the total final extra 2 x 1/4 turns, surely this would take the Nm over 55 . i dont want to get it wrong as i did before, with a new head, Thanks Bob

Title: Re: torquing the head bolts!
Post by martin_rowe on Jan 14^th, 2011, 1:14pm

that all seems correct.
the torque only gives the initial bite to get the head seated & the tension equal on all bolts, after that its all degrees.

Title: Re: torquing the head bolts!
Post by Tompion on Jan 14^th, 2011, 2:27pm

The Pdf
http://www.fordscorpio.co.uk/manual/engines/dohc2_3/2300CylHead.pdf

after 40Nm 55Nm
in the next part goes on to say 90 degrees then 90 degrees.

Title: Re: torquing the head bolts!
Post by ro284 on Jan 14^th, 2011, 2:44pm

I wondered what that meant Tompion! Many thanks guys.
Bob