[V8] Slipped Timing Update

[Dave Saad]

Pressure is a function of altitude, how many cranks, how much oil in cylinders, battery charge, throttle plate position, gauge accuracy, placement, and design, and probably other factors too.  If you are getting any pressure at all I think you can safely assume the valves are not bent.  My gauge has a long hose on it so I read about 90 PSI.  A leakdown test on the other hand looks fine.

Your failure is something I have run into too.  Any coolant leaking down onto the tensioner causes it to get sticky - and the typical result is that clacking noise many of us have experienced right after a t-belt job.  I am experimenting with graphite as the bushing lubricant now and so far so good.  Been on there for two or three years now, but I am very careful not to let any coolant get down there too.

So - any leak from the pump or the three hose connections on the front of the motor can easily find its way to the tensioner bushing.  On the bright side, you can get a fairly good look at the tensioner just by removing the left timing cover.  Something I do now any time I hear a suspicious noise.

And now a word about observation and comprehension.  Sometimes if you pick up on a tiny visual cue, you can stop something bad from happening.
Yesterday, at noon, I went out to drive back to work and noticed a small river of water in the gutter in front of my house.  I cleverly thought I should try to capture that water and divert it to my lawn - then got in the car and drove off.  When I got home, I drove through the small river again.  Then I went out and started working on the trailer - for camping this weekend.  Several hours later my wife came home and asked why the lawn looked like the Amazon.  It turns out that my main water line for the sprinkler system broke - dumping I estimate around 500 gallons an hour.  It ran for at least 7 hours - and possibly many many more.  I will find out just how long when I get the next bill. $%#@^ $%$#@ ^^^%$# $%#@$#.
I guess I will stay home this weekend and work on a sprinkler system.


Dave


On Aug 2, 2012, at 7:31 PM, rasrunnit at yahoo.com wrote:

> Finally got around to opening up the V8 after my slipped belt incident 6 months ago. 
> After realigning the cams I did a compression test. To my surprise every cylinder was in the 185 to 200 psi range and all seemed to hold pressure. 
> Am I safe to assume the valves are fine?
> 
> The problem turned out to be a leaking waterpump dripping pink coolant which crystalizing on the tensioner, gumming it up.
> 
> Jason
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