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#1
01-20-2014, 07:58 PM
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Timing belt inspection
TIMING BELT INSPECTION
It`s dry. Not too tight... (I`m absolutely sure it was done right, appr 25k ago.) http://www.youtube.com/watch?v=YdGZp...ature=youtu.be OK? Last edited by RedArrow; 01-20-2014 at 08:24 PM. 
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#4
05-18-2020, 08:56 PM
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Timing belt inspection again in 2020
I took a new timing belt video because I was working on the power steering today.
Since I was already there with the steering stuff removed and with plenty of space available, I had to look around... I inspected under the cover, cleaned the inside of the tb cover, it is all dry in there (no oil stains at all) but (when I had an exhaust leak under that ugly stup.d EGR mushroom--- it is removed and got blocked off since) some blck dust got in a little at the edges through the sealed gaps. The idler `roller` doesn`t jerk around, the waterpump does have a tiny little minimal play as I grab the teeth to try to rock it. Really not much. The belt isn`t stained, I don`t see `dry rot` or weird looking edges or teeth. I do know that they have to be somewhat `loose` but every time I saw/see mine, it makes me wonder: isn`t it on the loose side a little bit? The engine BTW was cold at the time of recording this video. https://www.youtube.com/watch?v=DQZpU1GONbU Not just the tightness, also the structural&chemical integrity at this point. So far I have driven ~35.000 miles on the timing belt that was installed by the PO, *perhaps* in the same year when I got the car 8y ago. (If you wonder, yes, car is in regular use but mostly for longer trips only.) Before I bought it, as far as I remember it got ``refurbed`` and driven for a few months on longer trips so that is X plus my 35k. I cant remember what the odometer mileage may have been at the time of that initial refurb. Currently it has 440500-441000. I`ll check what exactly it shows (and on top of all those miles there was a few months worth of driving which is extra miles because the cluster had been taken out once due to ignition switch wires and other dash wiring updates). Last edited by RedArrow; 05-18-2020 at 09:38 PM. Reason: Pictures added to the thread
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#7
05-23-2020, 09:08 AM
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It looks fine to me too. Remember there will be more "slack" or twist on a cold engine than a hot engine. I like to check it both when cold and when hot. As long as there is not excessive slack when cold AND still is at least a little slack (and 45deg twist ability) when hot, then it's fine.
If it becomes taut like a guitar string when the engine is hot, then that is too tight. Or if it's too slack and slaps the timing belt covers when the engine is running while cold, then that is too loose. Anything in between those extremes is good. It's not a very precise science. I think that engine went into that car right at 399,000 miles. I remember it turned over 400k with the diesel in it, and the timing belt was new when the engine went in. So at around 40k miles and what, 8-9 years (?) on the belt, probably still have some life left but might want to start thinking about replacing again in the next year or two, based on time rather than distance. 
__________________
86 745 D24T/ZF 345k lifted 2.5" 83 764 D24T/M46 155k
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