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The mkiv Supra Owners Club

carrillo rod bolt torques needed


StuartW

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From Carrillo Website;

 

"BOLTS

All bolts should be lubricated under the heads as well as on the threads. We recommend the bolt lube included, or as an alternative, molybdenum base paste mixed with engine oil.

 

The preferred method to torque the bolt is by using the stretch figure listed in the table below. In order to check bolt stretch, simply fixture one rod, leaving the cap portion free from clamping load. Measure both bolt lengths loose, then progressively tighten the bolt until the measured increase in length correlates with the figures below. Use the indicated torque reading to tighten all the connecting rods in final assembly."

 

3/8 WMC H6 .0050 to .0070 in .127 to .178 45 ftlb 61 Nm"

 

So i need a vernier caliper that can measure .000 of a mm:blink:

 

Or do i just torque them up to 45 foot pounds??

 

If the answer is Measuring can anyone suggest where i could obtain such a measuring tool?

 

I have a £60 digital vernier caliper but that just will not be accurate enough, I need like a dial mike or caliper!

 

Many of you on here must have come across and conqoured this problem :search: :D

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From Carrillo Website;

 

"BOLTS

All bolts should be lubricated under the heads as well as on the threads. We recommend the bolt lube included, or as an alternative, molybdenum base paste mixed with engine oil.

 

The preferred method to torque the bolt is by using the stretch figure listed in the table below. In order to check bolt stretch, simply fixture one rod, leaving the cap portion free from clamping load. Measure both bolt lengths loose, then progressively tighten the bolt until the measured increase in length correlates with the figures below. Use the indicated torque reading to tighten all the connecting rods in final assembly."

 

3/8 WMC H6 .0050 to .0070 in .127 to .178 45 ftlb 61 Nm"

 

So i need a vernier caliper that can measure .000 of a mm:blink:

 

Or do i just torque them up to 45 foot pounds??

 

If the answer is Measuring can anyone suggest where i could obtain such a measuring tool?

 

I have a £60 digital vernier caliper but that just will not be accurate enough, I need like a dial mike or caliper!

 

Many of you on here must have come across and conqoured this problem :search: :D

 

Torque em up dude;)

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The the torque of the rod bolts is the limiting factor on the weakest link inside the engine. Do it right and buy a bolt stretch gauge.

I think mine was about £25, just have a look on-line, I'm sure you'll find something.

 

Where did you get yours from Tony, I hate the bloody things and normally do it by torque, never had a problem yet but might be a good time to start using the stretch method.

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