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View Full Version : Torquing up headbolts



Lunner
21-06-2006, 22:38
IIRC these have to at some point be done to 25Nm, but all the 1/2" torque wrenches i can find go from 30NM, mine included, can't impagine an extra 5 Nm is gonna make that much of a difference.

Also my T55 bit is 1/2" drive and i can't find any 3/8" drive, whihc the smaller range wrenches seem to be

Coops
21-06-2006, 22:40
i blagged mine, bad practice i know but its been safe as houses for six months, and i used a 30nm min torque wrench

Lunner
21-06-2006, 22:42
thats good enough for me

over tight is better than undertight

stan
21-06-2006, 22:42
i have a 3/8 drive snap-on (oooh check me!) torque wrench for engine building, goes nice and low...its all thats needed.

machinemart do similar at very low cost.

Coops
21-06-2006, 22:44
thats good enough for me

over tight is better than undertight

guess what i used for angle wrench bit n all?

summeh
21-06-2006, 22:57
u might have trouble getting a 1/2" T55 socket down the hole if the cams are in place. Could only use a 3/8" on mine.

Halfrauds sell a "professional" 3/8 torque wrench that goes from 5-60 iirc, very good and cheap. u could always use it then take it back say it was wrong one lol.

Lunner
21-06-2006, 22:57
Bit or cardboard??

I have a spinning piecxe of plastci that you hold with your finger

Lunner
21-06-2006, 22:58
It fits down in there as i removed them with it, cams are still off the head, will just fit them when the head is back on, hard doing everything with the head sat on end so as not to damage the skimmed face

Coops
21-06-2006, 23:01
Bit or cardboard??

I have a spinning piecxe of plastci that you hold with your finger

nothing, eyesite n that was it, oh and a solid socket bar! :oops:

Lunner
21-06-2006, 23:10
LOL, could have made a disc of card and cut a square hole int he middle and marked the degrees round it lol

BenR
21-06-2006, 23:12
i have a 3/8 drive snap-on (oooh check me!) torque wrench for engine building, goes nice and low...its all thats needed.

machinemart do similar at very low cost.

what you want is a 1/4 clicker and 3/8 clicker, then a 3/8 dial and 1/2 dial

;)

Lunner
21-06-2006, 23:17
i have a 3/8 drive snap-on (oooh check me!) torque wrench for engine building, goes nice and low...its all thats needed.

machinemart do similar at very low cost.

Yeah but my T55 socket is 1/2" drive and i'm totally broke

stan
21-06-2006, 23:18
u can get a 1/2-3/8 adaptor for £1-2. check ur local cheapo tool store.

Lunner
22-06-2006, 09:22
I've found a 1/2" one that will take 3/8" sockets but not t'other way around, will save my £60 that i spent on a Teng torque wrench i think

1fast6
22-06-2006, 16:01
i just bought a 3/8 torque wrench :D

Gav
22-06-2006, 16:03
over tight is just as bad as under tight


check ur haynes manual mate....it tells u what n/m they are and tightening sequence u shud do

Rich
22-06-2006, 16:08
the final torque figures are in degrees, i guessed mine and its not used one dop of water in a year! and its had some abuse too!

Gav
22-06-2006, 16:10
:roll: each to their own then



as long as all y'all r happy with ur machines :D

Rich
22-06-2006, 16:14
yes each to their own i agree, i was just saving tom looking for final torque figures in haynes as they dont exist!

Gav
22-06-2006, 16:15
sorry man, i jst remember watchin my dad do it, as soon as u said degrees i remember him getting out that weird degree tool





my bad! :shock:

Rich
22-06-2006, 16:16
no need to apologise, i cant help it if i'm good :wink: :lol:

Gav
22-06-2006, 16:19
:wink: :twisted:

BenR
22-06-2006, 16:51
stock head bolts are designed to work with massive stretch figures so that 'idiots' can basically go stupid and not damage anything.

Not saying that anybody is stupid, but its got that safety factor.

Lunner
22-06-2006, 18:17
When you are working on a shoe string some thigns have to be improvised, can't so spending hundreds of pounds on exactly the right tools

Found a coverter i need now, so will torque tehm up to teh right torque and the right angle as my wrench has a built in angle gauge on teh head

MAXIBOY
22-06-2006, 20:35
benR and stan do you lube your head bolts and if so with oil or arp lube.

BenR
22-06-2006, 20:36
stock head bolts, 30w oil. Using ARP lowers the friction too much and affects the torque reading.

MAXIBOY
22-06-2006, 20:40
do arp do a stud kit for the f7 yet

BenR
22-06-2006, 21:01
nope