timing questions

[Landseer]

Chris, how about some more pictures of each roller in the path?

The oil pump gear, for instance, must be replaced on your car as it has eroded and looks sharp, albeit in the X direction as opposed to your belt with snapped in the Y direction. Am hoping you rebuilt the tensioner, applied new expensive plastic bushings to the tensioner pivot bolt, used a new bolt, utilized a new Laso water pump and 13 new bolts to attach it. Do not skip this stuff.

Chances are your crank gear is the same, but sharper. Gotta replace this stuff, man.

Regarding the comment about swapping belts with harmonic balancer at 45 Degrees, that is a step added for the 32V timing belt jobs ( a valve-preservation step intended for interference engines).

[MPDano]

Yikes, that's UUUUUUgly. Does everything turn over ok? If all seems ok, it could have been loose and flung off and wrapped the crank as you've said. Service your Tensioner, replace TB, WP and start it up!

[Landseer]

Porsche warns not to use one that has been folded, so I guess they've seen it before.
Still wondering what happened here, though.
Making it run is generally pretty easy.
The question: can it run reliably?
If you run the sharp, angle-worn pulleys, at least replace the tensioner bolt, bushings and waterpump.
Otherwise, might as well punt.

[trucker677]

I think the problem was that when I tighten the tensioner it came in contact with the harmonic balancer, and wedged it in there. the bushing was all screwed up in the tensioner.

[trucker677]

I got a used tensioner this afternoon, but when I looked at it in the book it doesn't have the two plastic washer that are pictured in the book, it has a brass bearing in there instead. I am going to think it came from the factory this way and not the other, the bolt that is with the new tensioner doesnt have the washer on the back side of it, does anyone know how thick and what size it has to be or is it to seperate washers.

[neil30076]

Help us out by referring to the item numbers below, so we know which washers, etc you are talking about.

[MPDano]

He's probably talking about 20 and 21 as mine were nylon bushings.

[neil30076]

Agree, they should be , and if they are not correct the next belt will be toast as well.

[trucker677]

thanks for the pic, It will help explain what I have, I dont have a scanner so I can't copy it and paste it,
on part number 20 and 21 i don't have those, I have a bearing that is inside of the hole that the bolt goes thru, was that an original piece and the nylon pieces were added after. I have the bolt but no part number 19. What are the dimensions of part number 19, can I use that bearing.

[Landseer]

19 is a spacer washer.
The plastic bushings are critical.
Maybe you could post closeup pictures of what parts you have?

[MPDano]

Originally Posted by trucker677

thanks for the pic, It will help explain what I have, I dont have a scanner so I can't copy it and paste it,
on part number 20 and 21 i don't have those, I have a bearing that is inside of the hole that the bolt goes thru, was that an original piece and the nylon pieces were added after. I have the bolt but no part number 19. What are the dimensions of part number 19, can I use that bearing.

Is there slight play in the bearing and bolt? If so, this is where the Nylon Bushings go. It will be very tight when new.

[kennner]

Might sound silly but did you have the belt routed properly?

[neil30076]

Occurred to me as well - not sure how you could get it wrong, - but worth a picture and instructions:

[trucker677]

yes I had it routed properly, I looked at it with the book opened on the engine, double checked as well.
in regards to the new bracket I got today it came off of a 928, a rod went through the block and the motor was taken out and tossed in the back corner of a garage. besides the motor failure the motor ran perfect for a few years. Also there is no play in the bolt where it goes thru the bearing, I will take pics though and post them so you guys can see what I am referring to.

[neil30076]

IIRC, the tensioner arm, pivot bolt, etc combination changed over the years, did the replacement come from the same year? Chris ( Landseer) any recollections of changes?

[trucker677]

here is some pics of both brackets

[trucker677]

I forgot to mention they are the same part number on the bracket as well,

[neil30076]

..and that part number is ?

[neil30076]

hopefully the -03
928 105 540 03 - 78 to 82
928 105 540 05 - 83 and 84

[kennner]

Looks like your top idler pulley was rubbing on the tensioner arm. Is the bearing ok in it?