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cylinder head bolt torque setting?

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cylinder head bolt torque setting?

Postby gewboy » Fri 2nd Jun 2006, 04:26pm

As title says can anyone tell me the correct torque setting for the cylinder head bolts, its a 1275, reading the manual i get either 40 or 46 lb foot, which is what i have set them at but i am getting leaks all over so i can only presume that is the wrong setting or my head is seriously warped....please someone tell me i am not tightening them enough
cheers
george
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RE: cylinder head bolt torque setting?

Postby gewboy » Fri 2nd Jun 2006, 06:09pm

dont normally do this but i am bumping to the top i desperately need an answer
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RE: cylinder head bolt torque setting?

Postby Brontoman » Fri 2nd Jun 2006, 06:11pm

http://www.minispares.com/Article.aspx?aid=275

all you need to know, 45lbs/ft oiled.
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RE: cylinder head bolt torque setting?

Postby gewboy » Fri 2nd Jun 2006, 06:16pm

buggery buggery rhubarbs looks liek my heads screwed then
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RE: cylinder head bolt torque setting?

Postby mini7racer » Fri 2nd Jun 2006, 07:02pm

haynes has it at something like 50 odd lb for the second stage.
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RE: cylinder head bolt torque setting?

Postby themaninthesuitcase » Fri 2nd Jun 2006, 07:20pm

I assume you torqued them up in the correct order?
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RE: cylinder head bolt torque setting?

Postby gewboy » Fri 2nd Jun 2006, 07:21pm

right for the sake of arguments i torqued it up to 50lbs and started her up and i am getting bubbles appearing under the head, so it would appear to my un technical brain that there is something wrong there and it cant be the gasket cos its a payen one and brand new, so can i liberally apply a touch of instant gasket all around to see me right until i can sort a new head/engine or i have another head that looks decidedly dodgy now i have just cleaned it up(a couple of score marks as if someone scraped a bit too hard to get the last gasket off) what are my options considering i am supposed to be doing the blackpool run in a few weeks time and i dont have the money to fix it properly????
In answer to another post on here(minis arent they great) no they are rhubarbin not
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RE: cylinder head bolt torque setting?

Postby chairchild » Fri 2nd Jun 2006, 07:25pm

Try the other head, as yours sounds screwed!
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RE: cylinder head bolt torque setting?

Postby mini7racer » Fri 2nd Jun 2006, 07:34pm

no you can not just apply some instant gasket to see you though.

take the head off and place a steel rule across it and look for gaps that will tell you if the heads screwed. also check the block while you are there.

head skimming doesnt cost that much, so so long as its not royally buggered you can get away with that.

also next time make sure both faces are completely clean of any gasket at all, and torque down as per the haynes manual, in the correct order, firstly to 40NM then 68NM (iirc but please check that to make sure)
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Re: RE: cylinder head bolt torque setting?

Postby gewboy » Fri 2nd Jun 2006, 07:40pm

mini7racer wrote: 40NM then 68NM (iirc but please check that to make sure)

forgive me for being thick but we were talking in lbs foot earlier now you throw in Nm to really bugger me up so does 68nm equate to 50 odd lbs as you put it in your previous post?
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RE: Re: RE: cylinder head bolt torque setting?

Postby midridge2 » Fri 2nd Jun 2006, 08:27pm

george your head bolts have been done up that many times they are more than likely stretched so tighten them down some more, what have you to lose if the head is warped. just dont snap the bolts. lol
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RE: Re: RE: cylinder head bolt torque setting?

Postby gewboy » Fri 2nd Jun 2006, 09:18pm

well done that man thats the type of advice i needed, and if there are people out there that disagree then sorry but without him i would be still driving a citreon ax
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RE: Re: RE: cylinder head bolt torque setting?

Postby mini7racer » Fri 2nd Jun 2006, 09:23pm

yes that does equate to 50 odd lb, but your torque wrench should have both lb and NM on it.
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RE: Re: RE: cylinder head bolt torque setting?

Postby gewboy » Fri 2nd Jun 2006, 09:31pm

nah just lbs on mine its a poundshop special i think :D
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RE: Re: RE: cylinder head bolt torque setting?

Postby Brontoman » Fri 2nd Jun 2006, 09:34pm

Malc,

It doesnt matter if they are stretched, the clamping torque will still be the same, just lower down the thread. I agree tho, if its goosed you may as well clamp it some more.
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RE: Re: RE: cylinder head bolt torque setting?

Postby rob3 » Fri 2nd Jun 2006, 10:10pm

It is :

First Stage 25 lb/ft (34NM)
Second Stage 50lb/ft (68NM)
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RE: Re: RE: cylinder head bolt torque setting?

Postby Dino » Fri 2nd Jun 2006, 10:16pm

First Stage 25 lb/ft (34NM)
Second Stage 50lb/ft (68NM)

You missed the 3rd stage - oh just a bit more ..... Bang oh b****r..

Seriously if you tighten them too much, as suggested above, it'll just pull the threads out of the block and make it less likely to seal.
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RE: Re: RE: cylinder head bolt torque setting?

Postby ceejam » Fri 2nd Jun 2006, 10:36pm

Overtightening bolts does not fix knackered head/blocks!
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RE: Re: RE: cylinder head bolt torque setting?

Postby gewboy » Sat 3rd Jun 2006, 04:16pm

doesnt fix it no but it fills a hole until i can get another engine:)
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RE: Re: RE: cylinder head bolt torque setting?

Postby wal292 » Sat 3rd Jun 2006, 05:32pm

its about 30 pound to get it skimmed i think could u not do that instead of a new engine?
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RE: Re: RE: cylinder head bolt torque setting?

Postby rob3 » Sat 3rd Jun 2006, 07:26pm

Over tightening will actually make matters worse, itll compress the fire rings round the cylinders too far and you'll lose seal. Losing compression making engine run like a bag of spanners. Theres only one torque thats acceptable, thats the one specified in the book. USE IT!!
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RE: Re: RE: cylinder head bolt torque setting?

Postby gewboy » Sat 3rd Jun 2006, 08:21pm

tightened it up to 85 and it finally stopped blowing bubbles at me.......now i know this probably isnt good but i have another car/engine in the pipeline so if this lasts me a week or so then i will be happy....as for compression I am running 160 all the way down i checked them earlier:)
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