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teknob
Newbie

Posts: 24
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« Reply #2 on: September 30, 2009, 03:11:50 pm » |
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roy4matra
YaBB God
    
Posts: 1236

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« Reply #9 on: October 02, 2009, 01:22:21 pm » |
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dont they have a number for how many degrees the bolts should be turned after a specific torque?  its very rare the resistance is fixed in boltholes
No. You are talking about a modern engine, where you are given a soft torque and then a torque angle which adds the final torque. This stretches the bolts, and they don't need to be re-torqued after a set mileage. However, with this system, you often need to replace the head bolts, since once they have been stretched, they cannot be re-used. You must always measure the lengths, and compared with the spec. The Murena uses older designed engines where you are given the actual torque and the bolts are not stretched. However, you must re-torque the head bolts after approx. 1000 kms and re-set the valve clearances. If you do not, the head gasket which will have settled, may blow. Roy
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