Hi all, i was wondering if the timing chain on an 1100 can be tensioned. I have done this on cars I have owned in the past and was curious about the mini. Does anyone have any thoughts about doing this?

Bryan

As far as i'm aware, later minis had a tensioner. To fit this you would need the complete backing plate and gears etc, I think, as the timing cover was different.

I have also seen reference to the neoprene tensioner rings for the cam gear used on simplex (single) timing chains. This shouldn't require many mods but i am unsure of the effectiveness.

Best bet is to use a duplex chain (and Gears) as this will help to eliminate the chain stretch, therefore no tensioner required. This will require the backing plate countersinking and the two bolts holding it to the block near the crank gear replaced with allen beaded bolts (countersunk).

Cheers
matt

Have to sort my chain out soon... Looking into getting a duplex chain



Are those the bolts that have to be countersunk

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"......The New MINI, a better car, but not as important" Jeremy Clarkson "Top Gear"

yes..counter sink bolts..so the chain don't hit them

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Stop Licking the Dog...I Don't Care Who Started It

Tensioner was used on the A+ engines. Designed for the simplex chain. Won't stop it stretching, just rattling....
Better to go for the duplex, they last a lot longer than the simplex.
Or if you have $$$ to spare, get a belt drive kit like mine...

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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.