Tmiing belt tensioner lifespan - Alfa Romeo Forum
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(Post Link) post #1 of 10 Old 24-08-07 Thread Starter
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Tmiing belt tensioner lifespan

I've just parked up the 146 with the timing belt tensioner sizzling and rattling in it. Initially I thought I heard something at higher revs but only 20 miles later its there at idle too. It could go at any moment and the sound is getting worse by the minute.

Word of warning - this is the uprated steel type tensioner and its less than 2 years old and only done 38000 miles!
I thought these uprated types were better than the original ones?
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Re: Tmiing belt tensioner lifespan

I wouldn't trust it myself, Alfa changed the belt and tensioner change interval to 36,000 miles, and that was after specifying the white plastic and then metal tensioners.

The white tensioners are actually ok, but the black ones are not BTW.
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Re: Tmiing belt tensioner lifespan

Nah m8, definitely not driving it and already ordered the kit. Just wanted to warn any folks who(like me) thought that the newer tensioners solved the problem. Turns out they do nothing 'cept look different

Unfortunately I've to drive it 15 miles to get it home.... risky I know and I'll be posting my own head on a platter here at AO if it goes on the way home
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Re: Tmiing belt tensioner lifespan

Quote:
Originally Posted by symonh2000 View Post
The white tensioners are actually ok, but the black ones are not BTW.
Not always!
http://images.google.com/imgres?imgu...%3Den%26sa%3DN
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Re: Tmiing belt tensioner lifespan

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Originally Posted by mo4 View Post
Nah m8, definitely not driving it and already ordered the kit. Just wanted to warn any folks who(like me) thought that the newer tensioners solved the problem. Turns out they do nothing 'cept look different

Unfortunately I've to drive it 15 miles to get it home.... risky I know and I'll be posting my own head on a platter here at AO if it goes on the way home
Keep us updated as to what its like when you've stripped it out.
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Re: Tmiing belt tensioner lifespan

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Originally Posted by armoore View Post

It looks to me like the bearing inside it has seized and the belt going around has removed part of the outer...

Not very good... I wonder how many likes that tensioner had done.
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(Post Link) post #7 of 10 Old 26-08-07 Thread Starter
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Re: Tmiing belt tensioner lifespan

OK I opened it up today and found that it is actually the cam belt idler pulley that has failed. I can see that it has pushed the grease out past the seal and is running dry and about to explode. It was still very hot 2 hours after driving the car

The tensioner itself is the silver steel type and it is absolutely like new after 38000 miles, so that's a good sign.
I replaced the lot anyway just to be safe so back on the road without a big bill
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Re: Tmiing belt tensioner lifespan

Thanks for keeping us updated
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Re: Tmiing belt tensioner lifespan

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Originally Posted by mo4 View Post
OK I opened it up today and found that it is actually the cam belt idler pulley that has failed. I can see that it has pushed the grease out past the seal and is running dry and about to explode. It was still very hot 2 hours after driving the car

The tensioner itself is the silver steel type and it is absolutely like new after 38000 miles, so that's a good sign.
I replaced the lot anyway just to be safe so back on the road without a big bill
Sounds like you were very lucky...

You will have peace of mind now its done too..
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Re: Tmiing belt tensioner lifespan

Boringly repetative, but have to add yet again, only replaced one contra-rotating balancer belt tensioner with its bearing, in 14 years motoring on the Lancia I had.: They were all of metal construction.: I managed to re-pack all the other ancillary bearings with grease, on a number of occasions.:
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