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#31
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Quote:
However, my professional opinion is that the variation in the diameter of a mass produced bolt might be more than the specification for which you are seeking. If the length of the bolt changes by 2 mm, the diameter is going to change a very small fraction of this value........maybe .003" or so. I have a difficult time believing that a typical head bolt is manufactured to a tolerance of .001". This would be necessary if you are seeking to use .003" as the go/no go specification. Naturally, I have no data.........so..........I'm admittedly just speculating. If your machinist has the data, and the bolts are manufactured to the tolerances required, then he's more than welcome to use it. But, I remain skeptical of this approach. |
#32
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So, if the proper way to measure these bolts is by diameter/shank who has seen the specs on this method? Maybe TimFreeh can look it up in his book?
Thanks, Matt |
#33
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I didn't mean it's the proper way in this case. In general engineering practice a torque-to-yield bolt has a measurment point along the shank and a corresponding spec. If the 603 bolts are any indication, there's another way to measure these bolts.
Sixto 87 300SDL |
#34
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see fsm for 617.95 engine
section 03.310 complete with illustration of a caliper measuring the neck on a rod cap bolt.
the head bolts specify to measure the length. so it is done both ways. tom w
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC] ..I also have a 427 Cobra replica with an aluminum chassis. |
#35
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You're supposed to add a Latin phrase after a statement like that to seal your credibility
Sixto 87 300SDL |
#36
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#37
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i never stated
that my machinist was measuring head bolts. i was referring to stretch bolts in general.
i can see how you may have interpreted it that i was making a specific statement, though. tom w
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC] ..I also have a 427 Cobra replica with an aluminum chassis. |
#38
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Quote:
The topic of the thread was head bolts. Was this not what he was measuring?? |
#39
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dont remember
just remember that they were stretch bolts. might not have been benz even.
tom w
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC] ..I also have a 427 Cobra replica with an aluminum chassis. |
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