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#1
03-16-2012, 02:59 PM
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617.951 Head Bolt lengths.....Which lenghts go where?
Does anyone know where the long, medium and short head bolts go for sure?
I didn't realize they are different length bolts till it was to late!  The guy that is helping me said that it is not a problem....that we will figure it out.  Thank You for any help you can provide!!! Jim ? 
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#2
03-16-2012, 03:11 PM
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The longest bolts go through the camshaft "towers"
The middle length ones go next to the camshaft "towers" The shortest ones... hmmm... I can't remember for sure... I'm sure someone else will remember! Before you re-fit the bolts, however, you should be checking the lengths for stretch as specified in the FSM... ...so have you got access to the FSM?
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior  Don't leave that there - I'll take it to bits!
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#3
03-16-2012, 04:51 PM
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You will figure it out pretty easily. The short ones go outside the valve cover, the medium on the head, and the long through the rocker towers. The 8mm hex go on last.
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$60 OM617 Blank Exhaust Flanges $110 OM606 Blank Exhaust Flanges No merc at the moment
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#4
03-16-2012, 04:54 PM
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Blow out the holes with compressed air and tube down them before you put the bolts in. Oil down a hole can hydro lock your tightening and bust a bolt before the bolt head even gets close to its purpose on the head.
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Cheers! Scott McPhee 1987 300D
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#5
03-16-2012, 04:59 PM
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FWIW, I chased all the holes on my block with a tap, and then cleaned the holes with brake cleaner and qtips. Took forever, but the head installed with no problems.
__________________
$60 OM617 Blank Exhaust Flanges $110 OM606 Blank Exhaust Flanges No merc at the moment
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#6
03-16-2012, 07:34 PM
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Thank You all for your tips and help! I will sleep better tonight with all your wisdom.
I start putting the head back on in the a.m., I am using all new bolts, brass nuts, ect.....The head had two cracks at #2 and #3 pre chamber holes, all new valve guides, new exhaust valves, valve seals and the head was machined .007.....So wish me luck! and again, thank you all for the help!!! Jim
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