DDK - Die Deutschen Klassiker

Well done, peace of mind is a wonderful thing.

So after scaring myself on Pelican regarding the fitting of hydraulic chain tensioner's I have decided to fit the safety collar to my standard ones, but where can I get them this side of the water - can anyone advise?

Jay

Jay: if you do fit the safety collars, just make sure that you allow a little bit of give (when the engine is cold). If the collars are set when everything is cold to have the chains tight, when the engine heats up (and expands) the chains could be put under a lot of tension: increasing the risk of a failure somewhere, far and beyond that of the original tensioner failure risk.

Hope I'm not stating the obvious, but just leave a reasonable amount of give, and it'll be fine .

A lot of the problems with the early chain tensioner’s were from the idler sprocket not having any bearings, they were just steel to steel, they would often friction weld themselves to the shaft, the later ones had a bronze bearing and these proved to be more reliable.

Regards

So is it quiet now Brendan? Did you replace the chains at the same time, or has this sorted it?

Sounds like a good job well done

HI just for my records , what is a STD tensioner???? and just for your records do not take it that the NEW (to you) , OLD type tensioner is A.OK to go out of the box/bag, you have a 50/50 chance it will need bleading, befor fitting.

regards mike

If I want to check my tensioners, how should I do it ?
Should they push (fingers ?) or do they need levering ?
I am going to tie the chain back so it can't slip, but not too sure what to expect in terms of tension...
Anyone ?
Tim

HI Tim if you have the NON pressure fed type you will NOT press the tensioner down, you will have to lever it down slowly, if you can move without levering it, the tens' requires a re-build or re-placement.
if you do re-place it with a new one , blead and top up the oil before fitting.

regards mike

MBEngineering wrote:HI just for my records , what is a STD tensioner???? and just for your records do not take it that the NEW (to you) , OLD type tensioner is A.OK to go out of the box/bag, you have a 50/50 chance it will need bleading, befor fitting.

regards mike

Mike checked my new ones when they arrived & one was deffo not OK out of the bag ... both new tensioners were re-bled before being fitted

One side OK, the otherside looks like this


I think I've found the source of the "noisy water pump like noise" that I reported some years ago !!

Q: Is the pivot replaceable ?
Q: If so, how does it remove ?

Cheers
Tim

Hello, Tim.

Yes..you need to buy a length of silver steel rod..IIRC 14mm..(check!).cut to length

The old one just knocks out, and the new is fitted with epoxy..

Kind regards
David

Tim

see my post above, the idler arms need to be replaced as they do not have a bush in them. These are very unreliable.

A lot of the problems with the early chain tensioner’s were from the idler sprocket not having any bearings, they were just steel to steel, they would often friction weld themselves to the shaft, the later ones had a bronze bearing and these proved to be more reliable.

Regards

I agree, the idler arms should be replaced with bushed items. I'm trying hard not to turn this into a top-end rebuild !
Two chain ramps had one end missing. One ramp was missing entirely !
I think I've found the source of the noise !!

Ouch !

HI Brendan what "IS" the diff' between the tensioners??



Which Tensioners would you fit?
Carrera Hydraulic style
930 'Turbo' style
Standard style


930 'TURBO' or a STD????????? I am


regards mike

My understanding is that there are three types of tensioners. The original tensioner fitted to car which would have had a 901 part number and were not a sealed unit. Then there is the hydraulic tensioners with the oil feed as fitted to the later model cars and the third tensioner which was introduced with the Turbo model (has a 930 part number) as is a sealed unit with an improved design which if fitted with the safety collar is (IMO) the best option.

I'm not sure if you can still get the original 901 tensioner anymore and maybe this is why you are confused Mike as in effect we only have two types!