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Registered User
Join Date: Apr 2010
Posts: 31
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Chain tensioner fail and rattle
Just installed the oil fed Carrera chain tensioner kit on a '77 turbo and the drivers side has some chatter when we fired it up. Tensioner is bleeding down and rattling. Is there any thing that can be done to try and correct that or are we faced with going back to the original chain tensioners with limiters?(my guy has had a few fail in the past and will only do the original tensioners this time if we have to redo) TIA
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06-24-2012, 05:42 PM
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Registered User
Join Date: Apr 2011
Posts: 235
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are you saying the new tensioners are faulty? I have heard a few cases of this. I just had a pressure fed tensioner fail on me but with 77k miles on it. New ones sorted it right out.
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1988 930: 3.5L 100mm LN slipins, LN FFA rods, Supertec studs, GT3582R with T4 1.07A/R twin scroll housing, RarlyL8 equal length divided headers, dual Tial MVS 38mm WG's, Carrera 3.2 heads with 993 big valves. 964 Cams, full bay IC, KEP st1 clutch. PE3 sequential ECU with 750cc EV14 injectors, CoP twin plugs, J&S Safegaurd, Aquamist HSF3 water inj. Wavetrac LSD. |
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06-25-2012, 02:24 AM
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Join Date: Apr 2010
Posts: 31
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Yes, the new one on the drivers side failed. Not sure if it's still got air in it but it doesn't seem to be working properly?
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06-25-2012, 06:22 AM
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I experienced two tensioner collapses without safety collar and one with safety collar. All before oil fed were available. Noise but no damage and I drove them home.
Still won't pay the extra price over the basic safety collar to upgrade to them. |
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06-25-2012, 08:53 AM
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Registered User
Join Date: Oct 2006
Location: Chas, SC
Posts: 1,052
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I've had three Hyd tensioner failures in two long hoods and one 77. Had one pressure fed failure in the 86 930. All just noise. Drove 500 miles to get home with the failed pressure fed on the 930. You just have to use your head and be careful. Both Hyd and Pressure Fed are a risk. Pressure Fed less risk. Just depends on your on personal preference and risk you care to take.
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06-25-2012, 12:07 PM
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Join Date: Apr 2010
Posts: 31
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Good news. Turns out after firing it up again for a run in it started working. Keeping fingers crossed
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06-25-2012, 03:07 PM
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Registered User
Join Date: Aug 2008
Location: S. Florida
Posts: 321
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Seems I recall that you are suppose to prime those things before you put them in else they retain air pockets and never really get the proper prime to function correctly. Hard to imagine them just failing like that.
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06-25-2012, 03:14 PM
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Registered User
Join Date: Apr 2011
Posts: 235
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I have never primed hydraulic tensioners and never had problems with the 4 or 5 I have done over the years just self bleeding post assembly. They run slightly noisy for the first few minutes is all. Mine would rattle intermittently and sometimes I would think it was just air, but gradually got worse until I needed new ones which worked out great.
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1988 930: 3.5L 100mm LN slipins, LN FFA rods, Supertec studs, GT3582R with T4 1.07A/R twin scroll housing, RarlyL8 equal length divided headers, dual Tial MVS 38mm WG's, Carrera 3.2 heads with 993 big valves. 964 Cams, full bay IC, KEP st1 clutch. PE3 sequential ECU with 750cc EV14 injectors, CoP twin plugs, J&S Safegaurd, Aquamist HSF3 water inj. Wavetrac LSD. |
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06-26-2012, 02:58 AM
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1973.5 911T 2.4L CIS TURBO
