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 Post subject: Timing belt too tight ?
PostPosted: Wed Feb 18, 2015 10:22 pm 
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Joined: Sun Oct 24, 2004 6:53 am
Posts: 69
Location: Oshawa , Ontario, Canada
Took my '89 1.3 GTi in and decided to change the timing belt while apart.........
Mechanic says he is feeling that the new belt is tighter than he feels comfortable with.
Normal ??
Comment ?


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PostPosted: Wed Feb 18, 2015 11:29 pm 
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Island Inbreeder
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Joined: Tue Oct 18, 2005 6:56 pm
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Location: Emerald city Washington
not good.!
Timing belt to tight could make front crank & cam seal failure and failure to adjustment roller bearing
along with premiture T-belt failure

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PostPosted: Thu Feb 19, 2015 4:24 pm 
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Make love, not moderators
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Location: Etobicoke, Ontario
almcphee wrote:
Took my '89 1.3 GTi in and decided to change the timing belt while apart.........
Mechanic says he is feeling that the new belt is tighter than he feels comfortable with.
Normal ??
Comment ?


How did he tension it? When you install a new belt, your supposed to roll the engine over TWICE with a ratchet and let the timing belt tensioner float a bit so it can automatically remove any slack and tension the belt, afterwards you cinch down the bolt that holds the tensioner to the water pump so it stays locked in place.

If that wasn't done and the belt was tightend by hand, then you run the risk of breaking the belt or premature failure of the tensioner bearing.

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PostPosted: Tue Mar 03, 2015 7:57 am 
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Joined: Tue Oct 03, 2006 10:43 pm
Posts: 720
Location: Texas 75150
My take on timing belts...
We run aluminum heads and blocks.
The expansion rate of aluminum is twice that of steel or iron.
I will install a new timing belt and idler pulley cold engine as per the factory manual.
I will run the engine until it gets up to operating temperature.
At this point I will retention the timing belt using the spring tension only.
I get over 60,000 miles on the belts and seals this way.

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PostPosted: Sat Mar 07, 2015 12:01 pm 
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Joined: Sat Apr 04, 2009 2:16 pm
Posts: 128
Location: Minnesota
I got over 90k on my G10's Goodyear timing belt by just going by feel. The new cam and crank seals that were installed around this time never needed to be touched, and that went another 4k miles until the car rusted into 2 pieces. I've seen too many goodyear timing belts go bad in short order to be a fan of them. The Gates belts continue to serve me well.

There's a lot of opinion out there on timing belt tension, and one must also factor in the method of which it is checked. I say to make it tight enough to where it doesn't flutter around at various RPM, and not much tighter than beyond that. Yes, I will often run an engine with all the covers off just to look at how the belt flops around.


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