coolant leak to timing belt job?

John S. Lagnese jlagnese at
Wed Aug 2 12:20:31 EDT 2006

Its waaaayyyy better to err on the side of caution with the belt. The 
alternative is catastrophic!
----- Original Message ----- 
From: "Bernie Benz" <b.benz at>
To: "Ed Kellock" <ekellock at>
Cc: "200q20V mailing list" <200q20v at>
Sent: Wednesday, August 02, 2006 11:52 AM
Subject: Re: coolant leak to timing belt job?

> Ed,
> Your TB is hardly broken in yet. I run mine well into tripple digit 
> mileage,
> only changing after that point if I must be in there for something else.
> Seal restoring snake oil beats seal changes every time.
> Bernie
>> From: "Ed Kellock" <ekellock at>
>> I'm with you on this all the way Bernie.  The t-belt was done 33k ago and 
>> it
>> looks good as well.  I am hoping to get away with a simply readjustment 
>> of
>> the tension.
>> Thanks!
>> Ed
>>> -----Original Message-----
>>> From: Bernie Benz [mailto:b.benz at]
>>> Sent: Wednesday, August 02, 2006 7:50 AM
>>> To: Kneale Brownson; Ed Kellock
>>> Cc: 200q20V mailing list
>>> Subject: Re: coolant leak to timing belt job?
>>> The 90 degree twist test is good enough for single cam S5s
>>> but, IMO, not tight enough for the twin cams. Give it a
>>> little more, but DF what AB!
>>> Bernie
>>>> From: Kneale Brownson <kneale at>
>>>> Date: Wed, 02 Aug 2006 07:45:33 -0400
>>>> To: "Ed Kellock" <ekellock at>, "'q - 200q20v'"
>>>> <200q20v at>
>>>> Subject: Re: coolant leak to timing belt job?
>>>> Swinging the water pump is how you adjust the tension on a
>>> 3B timing
>>>> belt, Ed.  Proper tension "test" according to Bentley is only being
>>>> able to twist the belt "90 degrees with the thumb and
>>> forefinger midway between the
>>>> camshaft and the pump sprocket".   Doesn't specify any
>>> measure for finger
>>>> and thumb strength, of course.  More than likely, a leak
>>> from the pump
>>>> means it's time to replace it and you might as well replace
>>> the belt,
>>>> seals and idler while you're at it.
>>>> At 11:23 PM 8/1/2006 -0600, Ed Kellock wrote:
>>>>> My pursuit of a coolant leak in the Avant has uncovered a
>>> seriously
>>>>> loose timing belt.  I had thought the leak was suspiciously coming
>>>>> from an area that could certainly have been from the w/p.  None of
>>>>> the many small hoses, buried by the now removed p/s pump
>>> seem to have
>>>>> been leaking.  Is it true that the timing belt tension is
>>> provided by
>>>>> adjusting the water pump?  I know that's how it is on the AAN but
>>>>> haven't played the t-belt game on a 3B or any 10v motor
>>> before.  My
>>>>> theory is that the water pump adjustment came loose and the water
>>>>> leak is a symptom of that.  Boy am I glad I parked it and
>>> got the V8
>>>>> t-belt done and out of the garage before digging into this.
>>>>> The belt is so loose that I can wiggle it back and forth
>>> on the water
>>>>> pump pulley.  I could pop it off with one finger if I
>>> wanted to.  I
>>>>> can bend the belt 90 degrees with one finger.  The
>>> opposite length of
>>>>> it between the cam pulley and crank pulley is snug, but
>>> also easily
>>>>> turned 90 degrees.
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