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Serpentine belt tensioner
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tom taylor
Supporting Member of Barthmobile.com 12/12
posted
After changing the oil, cranked the engine to let it warm up, observe any leaks, etc. I noticed that the tensioner was vibrating left to right but the belt tension appeared okay. I do know that the engine vibrates. Is what I am observing normal or has the vibration and age worn the spring and I need to install a new tensioner? Thanks.

Tom Taylor
1993 Cummins
8.3l
 
Posts: 306 | Location: Jacksonville FL | Member Since: 05-21-2012Reply With QuoteReport This Post
Medic37
Supporting Member of Barthmobile.com 8/10
Picture of Medic37
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I hadf mine replaced a few years back, as it had lost it's ability to maintain tension on the belt.

I do believe there are 2 positions the tensioner can be placed and the mechanic mounted-it on the most inboard location, as it seemed to work better there in his opinion.

The tensioner should "vibrate", but I think the belt should appear to run a fairly smooth coarse.


~Mac~

1990 31 Foot Regency
Spartan Chassis
Cummins 6CTA8.3
Alison MT643, 4-speed
8905-0123-31RDS-A2
 
Posts: 259 | Location: Sand Creek Township, Minnesota | Member Since: 06-21-2005Reply With QuoteReport This Post
Rusty
Supporting Member of Barthmobile.com 2/16
Captain Doom
Picture of Rusty
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If the tensioner vibrates, the crankshaft damper should be checked.


Rusty

MilSpec AMG 6.5L TD 230HP; built-to-order by Peninsular Engines: Hi-pop injectors, gear-driven camshaft, non-waste-gated, high-output turbo, 18:1 pistons. Fuel economy increased by 15-20%, power, WOW!"StaRV II"

'94 28' Breakaway: MilSpec AMG 6.5L TD 230HP

Nelson and Chester, not-spoiled Golden Retrievers

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In either case the idea is quite staggering. - Arthur C. Clarke

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Posts: 7734 | Location: Brooker, FL, USA | Member Since: 09-08-2005Reply With QuoteReport This Post
Corco
Picture of Corco
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In 1986 on the cummins C series 8.3L there was a recall on the camshaft vibration dampners.

I don't think it still applies but here is the link to reference.

http://car-and-safety.com/reca...gine-jan-22-1986.htm

They use 143 ft-lbs of torque to tighten the bolts on those as per one web site.
 
Posts: 36 | Location: Northern Atlanta Burbs', Georgia | Member Since: 06-24-2012Reply With QuoteReport This Post
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    Forums    Tech Talk    Serpentine belt tensioner

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