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Timing chain tension
Posted: Thu May 03, 2012 2:06 pm
by 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.
Re: Timing chain tension
Posted: Thu May 03, 2012 8:59 pm
by 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......
Re: Timing chain tension
Posted: Fri May 04, 2012 12:03 pm
by dylann
Many thanks for that. I will visit my local car dump as soon as it stops raining!
Re: Timing chain tension
Posted: Fri May 04, 2012 12:52 pm
by chrisd87
Were these fitted to all Minis, or just certain ones?
Re: Timing chain tension
Posted: Fri May 04, 2012 1:41 pm
by bmcecosse
All later Minis......on the A+ engines.
Re: Timing chain tension
Posted: Fri May 04, 2012 2:29 pm
by chrisd87
OK thanks for that, will have to keep a look-out.
Re: Timing chain tension
Posted: Fri May 04, 2012 6:14 pm
by Declan_Burns
There is one redundant hole after fitting-see below
Regards
Declan[frame]
[/frame]
Re: Timing chain tension
Posted: Fri May 04, 2012 8:48 pm
by bmcecosse
No! You should use that hole. There should be a tapped hole in the block at that point.
Re: Timing chain tension
Posted: Fri May 04, 2012 10:02 pm
by Declan_Burns
There wasn't on mine.
Re: Timing chain tension
Posted: Fri May 04, 2012 10:28 pm
by 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......
Re: Timing chain tension
Posted: Sat May 05, 2012 7:07 am
by kennatt
probably only need if it was dripping oil from the cover
Re: Timing chain tension
Posted: Sat May 05, 2012 1:43 pm
by 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]
Re: Timing chain tension
Posted: Sat May 05, 2012 4:25 pm
by bmcecosse
Good installation shot -how odd !! I certainly used all the holes. But I doubt it matters as suggested - unlikely to leak....
Re: Timing chain tension
Posted: Sat May 05, 2012 9:20 pm
by ronnie
Just read this thread and question is my Morris 1098 is not fitted with a cam chain tensioner ?? Is this correct
Re: Timing chain tension
Posted: Sat May 05, 2012 9:31 pm
by bmcecosse
Not a 'working' one anyway........it may have the useless rubber rings around the cam sprocket...........
Re: Timing chain tension
Posted: Sat May 05, 2012 9:37 pm
by 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
Re: Timing chain tension
Posted: Sat May 05, 2012 10:04 pm
by 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
Re: Timing chain tension
Posted: Sat May 05, 2012 10:47 pm
by 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
Re: Timing chain tension
Posted: Sat May 05, 2012 11:06 pm
by 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.
Re: Timing chain tension
Posted: Sat May 05, 2012 11:08 pm
by 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.....