Mrmerlin

I think that a measurement of the water pump pulley diameter must also be taken into account as a smaller diameter pulley will make the PKT go to extended range
I have seen different styles of water pump pulleys

PorKen

Just because you decided to talk all the time doesn't mean people have to listen. Or that you make sense.

Imo000

The explanation for lower roller makes perfect sense to me Ken. It doesn't to you?

PorKen

The roller(s) make sense for an unmanaged belt system Imre. As does a warning system.


None of these things appear on any V8 that I know of. Virtually any automotive engine, either.


Manual tensioners are for four cylinders at best. (Which is why Gates recommends a tensioner/damper system.)

GregBBRD

Yeah, the fact that you can't pull a belt between the crankshaft drive gear and the lower roller doesn't make any sense, at all.

I'm certainly wrong. Don't listen.

Anyone here want to bet that the instructions for Ken's Portensioner don't change to tell people to retain this roller?

siscogts

I saw a sticker on sliding Doors of a bank in croatia, showing "do not enter with guns". Never see in other Banks doors. But why not? I think that it is better to be safe than sorry.
And maybe it was the very first timing belt this long in late 70ies, so porsche was a bit worried about this.

Gates, recommends tensioner/ damper system, meanwhile they produce a timing belt for a car Having a different system. Don't you think that porsche and Gates were aware of this when they decided how the belt had to be, years ago?
I do not believe that Gates and/or Porsche made belt and tension system on wishful thinkings you were talking about at first pages.


Regards, Francesco

Lizard928

When work is done on an Audi/VW etc and the T/D is out of normal range, what is their method of correction?

jcorenman

This one? Looks like a different tensioner/damper.

jcorenman

Good point. Smaller-diameter pulleys/gears, whether worn or "creatively" engineered, will increase the amount of belt that must be taken up.

GregBBRD

Somehow I doubt that they will say:

"Enlarge the holes to 8mm, pry it towards the fulcrum, and tighten 'er down".

Hai gebissen

I will measure this for you next time I am at the car, but it was a new genuine Porsche pump ~1500 miles ago. I will measure the new cam gears (Roger) and oil pump gear (Porsche) as well.

Mrmerlin

HAI as a side note did the water pump sit on 2 pins to locate it to the block? if one or both were removed then the pump could migrate upwards thus increasing the amount that must be taken up

ROG100

Actually not British humor at all. I made the decision to remove the lower rollers/guides on my cars as I personally do not see a need for them at all. I am also very happy to get rid of the stock de-tensioning system as I see no use for it at all. I was very happy to change out the lifters for lightweight ones. I was happy to install the vacuum pump system on the GTS. I was very happy to install modified S3 cams in my GTS. I also added a wider throttle body and was happy to do so. I have made many modifications to my cars and completely at peace with my decisions.
I just bought a V12 Mercedes when everyone tells me I am nuts because the engines blow up.
I guess I am not a conventional person at all. 8>)

ptuomov

Funny.

The engine that is now in the car has PKT, Gates racing belt, lightweight VW flat lifters, modified S3 cams with lobes matching these lifters, single beehive valve springs set to custom load, ported intake, etc. I just got a twin turbo V12 Mercedes too! Talk about "correlated errors"... ;-). I think that the Obama administration may have to regulate separate bathrooms for the two of us...

ROG100

Thanks Stan - you get what I have been trying to say - until we know all the details no conclusion can be reached at all.