Cam tool

Mark McClure · 08-03-2004, 12:07 AM

I posted on the other forum but this may be a better place to get the answer.

Q. How does the cam tool work on the cam with the bolt rather than the nut.

According to Waynes book the cam timing for high lift cams requires the cam to be turned for adjustment.
- If the tool holds the sprocket you can not urn the cam.
- If the tool holds the sprocket that means that when you tighten the bolt you are placing force against the dowel pin.
- I thought that the washer covered the dowel pin holes so you can not use the tool to hold the sprocket to tighten the bolt.
- If the tool does not cover the dowel pin holes the pin will fall out.

So many questions so little understanding!

Cheers

Mark......

Rot 911 · 08-03-2004, 05:01 AM

Exactly what I was pondering when I got ready to time my cams on my 3.2. What you end up doing is getting the cams timed, put the dowel in the hole where it will slide all the way in (only one of the holes completely lines up) snug up the bolt, but don't torque it down, then recheck the timing. Repeat as needed. When you think you have everything perfectly timed, torque down the bolt and recheck. The tool will fit in the outer sprocket holes even with the washer installed.

iobound · 08-03-2004, 05:35 AM

Funny you should ask. Last night I got my cam tool via UPS from Pelicanparts.com. The tool has three pegs that fit into holes in the sprocket. This allows you to hold the cam stationary while you loosen the bolt using a regular 12 point socket. It took all of 5 mins.

Mark McClure · 08-03-2004, 02:57 PM

iobound- So the tool fits in other holes rather than the dowel pin holes?

Kurt- if you do not have the dowel pin installed then you can not move the cam via the tool because it is not joined to the sprocket?

This is getting more confusing!

Cheers

Mark..........

iobound · 08-03-2004, 04:27 PM

Hi Mark, this is my first rebuild so don't consider me the expert. With that said I bought the tool because I couldn't figure any other way to remove the cam nut safely. The tool is a 2" diameter circle with a 17" welded on handle. The circle has three pegs protruding from it that fit into three of the 18 holes near the outside edge in the sprocket. The circle is big enough to fit a socket into the center of it so that you can safely remove the cam bolt.

Regards,

Daryl

Rot 911 · 08-03-2004, 05:58 PM

Mark, do you have the Bentley manual for the Carrera? It actually does a better job showing how to time the cams then Wayne's rebuild book does. Excellent photos. (Not dissing Wayne's book, I used it for my rebuild)

Mark McClure · 08-03-2004, 06:34 PM

No I have the Haynes manual.......it uses a 2.7 as the example with a supplimentry for later cars. Not very concise.

Hey you have a Sprite......is it the bug eye?

magic930 · 08-03-2004, 09:33 PM

I was very confused when I started this process but learned quickly. I did not have high lift cams so I was able to turn the crank as the method to get them timed right. The cam tool does fit with the washer in place, the pegs on the tool are half moon shaped and the washer only covers half the hole.

If for the high lift cams you need to turn the cams then you will need to tighten the bolt without the washer but with the peg in place, while holding the sprocket with the cam tool. Then remove the peg and use the tightened bolt to turn the cam while you continue to hold the sprocket with the cam tool.

Mark McClure · 08-04-2004, 04:15 AM

OK now that makes sence.....thanks Magic930. Without having the tool in hand and seeing the fit it is quite confusing.

OK all I have to do is order the tool...guess what.......when I did the ring around the Porsche places said that they do not stock them but they can order from the states. All this after I just recieved the shipment. I just know that customs will take my first born as payment for specialised imported tools.

Thanks to all.

Cheers

Mark............

Rot 911 · 08-04-2004, 05:04 AM

Quote:

Originally posted by Mark McClure
No I have the Haynes manual.......it uses a 2.7 as the example with a supplimentry for later cars. Not very concise.

Hey you have a Sprite......is it the bug eye?

Mark you really need to get Wayne's rebuild book and the Bentley Manual for the Carrera. If you send me your address I will copy the section of the Bentley manual for timing the cams and mail them to you.

And yes my 1958 Sprite is a Bugeye!

magic930 · 08-04-2004, 08:02 AM

Don't be alarmed when your new cam tool does not fit properly, you may have to file the pegs to get an easy fit. It is important that they seat properly before you try and torque the bolt otherwise it will slip.

If you have difficulty locating a tool it would not be too difficult to build one. Find a 3 or 4 inch long steel pipe which fits snugly over the washer, then grind away material leaving three pins. Drill a 1/2" hole in the pipe and put a steel bar through for a handle.

Mark McClure · 08-04-2004, 04:25 PM

Yes I have thought about building the tool or I think that I can borrow one from the local club.

Waynes book is on the toilet floor..regular reading material. It does not show the bolt style cam. I have not seen the Bentley manual, maybe it is not readily available in Oz.

To move the cam I will have to

1. remove the bolt and washer whilst holding cam
2. replace bolt only and tighten
3. remove dowel
4. move cam using tighten bolt
5. install the dowel
6. remove bolt
7. install bolt and washer

Thanks for the insight.........

Mark......

Mark McClure · 08-08-2004, 08:42 PM

Just a quick update on this. I spoke to a well known Porsche shop the other day and asked for a cam holding tool for an 82 bolt style camshaft........today I got a phone call and get this I was quoted $430 AUD.

Either he has quoted the wrong tool or I live on Treasure Island (Oz).

Cheers