Timing chain tension

[dylann]

Since buying a new chain and kit for my 1958 1000, I have seen comments on the uselessness of the 'tensioning' rubber rings and the possibility of using a Mini cover which has a proper tensioner. I have read, somewhere, that this cover has only 10 holes in the cover compared with 11 in the Minor cover.
Am I correct in assuming that one of the holes is not used and the others all line up with the existing holes in the block or plate? As a new member I would appreciate any advice.

[bmcecosse]

Mini cover has MORE holes - it uses existing bolt holes on the front plate. Best to get all the bits you need from a Mini engine - and grab the crankshaft damper too if it has one......

[dylann]

Many thanks for that. I will visit my local car dump as soon as it stops raining!

[chrisd87]

Were these fitted to all Minis, or just certain ones?

[bmcecosse]

All later Minis......on the A+ engines.

[chrisd87]

OK thanks for that, will have to keep a look-out.

[Declan_Burns]

There is one redundant hole after fitting-see below
Regards
Declan[frame][/frame]

[bmcecosse]

No! You should use that hole. There should be a tapped hole in the block at that point.

[Declan_Burns]

There wasn't on mine.

[bmcecosse]

Hmmm - can't remember now - maybe it's on the front plate and needs to be drilled through, and bolt//nut used. I certainly used all the holes......

[kennatt]

probably only need if it was dripping oil from the cover

[Declan_Burns]

It sealed OK-there's no oil leak. Maybe I was just lucky.
The photo below shows there is no hole so drilling is required.[frame][/frame]

[bmcecosse]

Good installation shot -how odd !! I certainly used all the holes. But I doubt it matters as suggested - unlikely to leak....

[ronnie]

Just read this thread and question is my Morris 1098 is not fitted with a cam chain tensioner ?? Is this correct

[bmcecosse]

Not a 'working' one anyway........it may have the useless rubber rings around the cam sprocket...........

[ronnie]

Hi Bmc when doing my timing which as you'll remember was well out I remember rubber on the sprocket which I scrapped off ?? Could this be causing any cam chain noise

[bmcecosse]

Yes! There are two rubber rings fitted in grooves around the rim of the cam sprocket....... Item 45 on this http://www.moss-europe.co.uk/Shop/ViewP ... exID=17070

[ronnie]

What is the purpose of these rubber rings ?? I don't recall seeing them. I also don't have a double tooth sprocket like the one in the Diagram

[chrisd87]

The double tooth sprockets are for a duplex (i.e. 2-row) timing chain. Not fitted as standard to the Minor, but a common upgrade.

[bmcecosse]

The rings are there to quieten the chain - on the single row sprocket (item 46). The double row sprocket is item 48 - part of the 'duplex' kit - used with high lift cams and strong valve springs.... Not necessarily quiet - but stronger..... The Mini tensioner set up uses a simpler single row sprocket with no grooves for the (useless) rubber rings. it IS quiet.....