The Triumph Dolomite Club - Discussion Forum

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 Post subject: 1850 Chain tensioners
PostPosted: Mon Mar 05, 2018 10:47 pm 
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TDC Cheshire Area Organiser

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Hi All,
There was not long ago a post on dodgy chain tensioners and slipper pads......
I cant seem to find it :( :(
Can anyone tell me how to identify them and which one's to avoid :wink:

Cheers,
Tony.

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PostPosted: Tue Mar 06, 2018 12:03 am 
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Avoid anything with "Rolon" written on it!

Seeeeemples!

Steve

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'78 Sprint Auto with Vauxhall Omega 2.2 16v engine (The Dolomega)
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PostPosted: Tue Mar 06, 2018 6:45 am 
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To be fair, the only reported failures thus far have been with the Sprint duplex style tensioner.

The simplex style, 1850, TR7 et al, have far greater application, and may have safety in numbers. I think it will be far harder to avoid Rolon with the simplex variety, but yes indeed, they are the culprit with the duplex failures.

It may be that current stock just means production hasn’t switched to the defective factory...


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PostPosted: Tue Mar 06, 2018 9:24 am 
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I had my 1850 engine in bits recently and had bought a new tensioner from one of the usual Triumph suppliers. Yes, it was a Rolon and it differed from the original in several ways, not least in the tiny, tiny hole for the oil passage. Since the original tensioner had only done about 60,000 miles and had minimal grooves from the chain, I put it back rather than risk the Rolon. I think you will be hard put to find a new tensioner that isn't a Rolon, and who knows they might be fine on the single row chain. I just didn't want to risk it.

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(1969 MGB GTV8, 1977 Dolomite 1850HL, 1971 MGB roadster now all three on the road)


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PostPosted: Tue Mar 06, 2018 12:36 pm 
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I've moved the thread here because it is "Dolomite-related".

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Meetings take place on the first Wednesday of the month at 8.00pm at The Old Brickworks, Wakefield Road, Drighlington, Bradford, BD11 1EA

1972 Dolomite 1850 auto (NYE 751L - Now for sale)
2003 Volvo XC90 D5 SE (PX53 OVZ - The daily driver)
2009 Mercedes-Benz W204 C200 CDI Sport (BJ58 NCV - The 2nd car)
1991 Toyota Celica GT (J481 ONB - another project car)
Former stable of SAY 414M (1974 Toledo), GRH 244D (1966 1300fwd), CDB 324L (1973 1500fwd), GGN 573J (1971 1500fwd), DCP 625S (1977 Dolomite 1300) & LCG 367N (1975 Dolomite Sprint) plus 5 Acclaims and that's just the Triumphs!

Check my blog at http://triumphtoledo.blogspot.com
My YouTube Channel with a bit of Dolomite content.

"There is only one way to avoid criticsm: Do nothing, say nothing and BE nothing." Aristotle


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PostPosted: Tue Mar 06, 2018 4:58 pm 
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Many thanks everyone thats a big help :D :D

Cheers,
Tony.

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PostPosted: Thu Mar 08, 2018 7:14 pm 
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Tony,
There have been several threads on tensioners. This is one I started regarding my SPRINT. viewtopic.php?t=30444
The problem isn't about the size of the lubrication hole its more about the quality of the bonding between the slipper pad and its metal base. I now have a Jaguar item installed and due to these pics and this article, that's all Robsport will sell you now.
Yep, Rolon definitely is rubbish.
Rob

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1915 Ford "T" Speedster (Evangeline), 1921 Ford "T" Tourer (Anastasia), 1955 Zephyr 6 (Purdey), 1975 Dolomite SPRINT (Daisy), & a couple of moderns.


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PostPosted: Thu Mar 08, 2018 10:43 pm 
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Hi Rob,

Thanks for that, this is the one i had seen before.... Great to find it again :D

Cheers,
Tony

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PostPosted: Fri Mar 09, 2018 9:01 am 
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So it is a Jag bit from Robsport? Didn't know that.

I am amazed that a car part supplier can't find an adhesive that can reliably stick rubber to metal. It seems pretty basic stuff.


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PostPosted: Fri Mar 09, 2018 9:37 am 
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THE JAG ONE IS NOT COMPATIBLE WITH AN 1850. THERE HAS NOT BEEN A PUBLIC FAILURE OF AN 1850/TR7 ROLON ONE YET.

THE JAG ONE IS SLOWLY BEING SUPERSEDED BY SOME SUPPLIERS WITH THE ROLON BRAND TOO


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PostPosted: Fri Mar 09, 2018 10:04 am 
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Has the Stag world had any failures? I think they are the same.

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1961 Chevrolet Corvair Greenbrier Sportswagon
1980 Dolomite Sprint project using brand new shell
2009 Mazda MX5 2.0 Sport
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PostPosted: Fri Mar 09, 2018 10:15 am 
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Quote:
Has the Stag world had any failures? I think they are the same.
I was thinking that as well :? Anyone heard of it?

Cheers,
Tony.

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