Hi

I would just like to double check some bolt tension figures with the experts
Engine is a 1275 (1100s)
Main bearings i have done to60ft lbs without locktabs and bigends to 35 ft lbs.
I hope this is correct, the manual listed 45 ft lbs for cooper s only.
Do they use better blts for the higher tension?

Thanks

What are the rods - some 1100s have S rods. I would be very careful with what you are doing in there, its not something with a margin for error.

Dan

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Videos - Turbocharged A-Series on Dyno & at Wakefield
Mafs waz not my strong subgeckt at skkol

Measure the threads on the bolts. If they are 3/8" (same rods as Cooper S) they should be 46 ft/lb.
The later 1100S, & 1275LS onwards bolts are 11/32" diameter, I think they are 35lb/ft (my 6 manuals don't say different).

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

35 ft/lbs is correct.

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Hi

Just had a look at the rods they are AEG521 .
I'm guessing that might be cooper s and 46 ft lbs

Thanks

Yes that is correct, if bolts and nuts are originals.
Have a good look at the threads on the bolts, if damaged replace them.

Note that ARP's replacement S ones are 50ft/lb, using the moly lube supplied with them.
These are getting bloody dear now, I use ARP's 155-6002 `big block' Ford ones instead. Just take a slight head reshape on the sander to fit.
Less than 1/2 the price..... same grade bolt.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.