mark kibort

I just finished timing out the petty motor which is a 85 part euro 5 liter.
Im using the 79 tensioner and all things that touch the belt are from the old style. (pulleys, pump, etc)

i used the kempf tool as i have for years on the holbert car as well as the current engine. a long time ago, i tried to do a calibration with a tool at CT automotive and found that near full scale on the kempf tool was the setting (5.0). Now, i actually have a porsche tool, and checked the calibration with the system that comes with the tool. its dead on 4.0 pad registers 4.0 on the tool.

i check the belt after using the kempf tool to set it at the high side of its tensioning window. i use the PORSCHE tool and it shows 2.5. AHHHHHH!

NOW what do i believe!!????????????????????????????????
maybe this is why my belt jumped 2 teeth in that WCGT race back in '04???????

i then went .5 turns more and got to 4.0 on the porsche tool, but it was so far off the scale with the kempf tool it felt like it was going to stretch its spriing!

pictures to come.

any thoughts?

i did try one thing, if i use the porsche tool upside down, i can get 4.0 at the max window kempf tool setting.

Mk

cpayne

I'm a noob and offer simple and obvious suggestions, but I heard from someone on the list that the spring and its tension are the kempf tools Achilles heal. If you have used the tool many times, maybe the spring tension has deviated from normal. If your kempf tool is well used, have you checked it against a newer or less used kempf tool? Probably not the problem but easy to rule out. Good Luck

Landseer

Why high-side on a 16V car?

blown 87

The 9201 is a very sensitive, precision tool, and it is very sensitive to how it is used.

Always go at least two full turns on the crank, and stop at EXACTLY the same place, use the 9201 at the same place, using the same techniques and it will be dead on, and may vary by .01 on the scale if you stop the crank at EXACTLY the same place and use the same technique and hold it in the right place.

Every one who I have show how to use it always seem to have the same issues, they get close to stopping in the same place, but not EXACTLY at the same place, and you can not use the tool like that.

I have tested my 9201 against 3 of the other tools, one was new, one had been used a couple of times and the other one had been used many times, none of the three were close to each other.

My suggestion is to get Greg Brown to show you the way to use it.

Tom. M

Porkensioner it and forget it....!!!!

Ispeed

PK tensioner!!! No need for a Kempf or ps9201

mark kibort

I think i know how to use it. used it a bunch of times, in the old days. its pretty simple . it requires a touch. no mater where i measured on the belt, but of course i measured at the same place for the same readings, AND the readings were always identical. if you are careful and press down the side bar slowely, without moving anything, you get very repeatable readings. Im getting 2.5 over and over again. the kempf tool is reading well out of the window.

here are the pictures.

the spring would have to be REAL weak to do what is happening. Ive taken care of the tool and havent exposed it to anything or very many uses.

mk

Landseer

Until the Audi tensioner fails.


Mark, I had some reproducibility problems with kempf and found my grip mattered. It was binding unless held and rotated so-as not to put lateral force on the pivot pin.

mark kibort

your not helping!

btw, show me someone that is using the pktensioner in a race car and it survives a race season and Ill buy one.

mark kibort

the first pictures are the kempf tool before and after checking the tension

the later pictures are of the porsche tool, in place and reading after the "button" is slowely pressed to take up the slack of the device. no mater how I oriented it, it read 2.3 on the scale. i cant get it to read ANY higher. again, unless you use the tool upside down (for which i was able to get a higher 4.0 reading) then something is probably wrong with the Kempf tool

the last few pics are me with the calibration bar showing that it reads 4.0 with the bar. if i was able to do that i should be able to simulate this with the porsche tool on the belt. its not rocket science here!!!

mk

mark kibort

I think i have the audio file to show the tone of a properly adusted belt, but who did the test that verified this test and tone?

Landseer

Can the later tensioner be fitted?

Then you could rig a warning light.

mark kibort

if i use the porsche tool and use the little roller and put it ON timing belt rib, it shoot up to 4.0 on the meter. but in the valley of the belt, (between rib teeth) it registers 2.2-2.3 consistantly, every time.
do i need to make a youtube video to show im using it right?

mark kibort

here is a way to also check the tension. check the tension, but leave the porcsche tool on the belt. tighten the tensioning nut a half turn and watch the setting move. this is now without any human intervention . i did a half turn and it went to 4.0. then rotated the engine a few times and then checked again. 4.0. on the money! the kempf tool is well passed the window. about 1/2 window passed the window opening . middle of the opening is suppositly 5.0.

Bilal928S4

When you use the kempf tool does the back of the tool touch the rear cover? I CSS or clearly see in your picture.