Author Topic: Camshafts (Read 17811 times)

TDIMeister · « **Reply #30 on:** September 05, 2008, 08:55:55 am »

Maybe I'm mistaken, but I thought the 1.6 would use a keyed sprocket like the gas engines instead of the tapered sprocket?

gigaz2 · « **Reply #31 on:** September 05, 2008, 09:12:08 am »

nop, it has to be adjustable in order to index the cam properly.
IMHO, it does have the key slots, both the pulley and cam, but its not supposed to be used.

diesel in front, gasser at the back

EDIT: one can almost take a glimpse at the key slot on the diesel cam

TDIMeister · « **Reply #32 on:** September 05, 2008, 10:08:09 am »

I believe shortysclimbin is trying to get a gasser cam with its keyed nose adapted for a Diesel. tdi rs (Simon) did this when using an adapted gasser cam, and another member in tdiclub called mojogoes (Steve) bought this engine from Simon.

One can conceivably fabricate an adapter sleeve that's shrink-fitted over the keyed nose, and the male part tapered like the Diesel. Better yet, cut-off the tapered nose off a dead Diesel cam and bore/ream a hole with shrink-fit tolerances to go over the gas cam.

The only important thing is to align the cam Cylinder 1 TDC to crankshaft TDC. On the TDI, one uses a locking tool that basically makes the end-slot parallel to the valve cover sealing surface, i.e. parallel to the head deck surface. I think one way it could work is to cut opposing grooves that are aligned to cam cylinder 1 TDC in the nose shoulder (I imagine the key serves this purpose on the gas cams) and align the grooves to some reference surface like the valve cover.

TDIMeister · « **Reply #33 on:** September 05, 2008, 10:56:57 am »

I took your picture and quickly drew up what I explained above if you're looking at the cam from the nose end. I think it's easier to understand in pictures than in words. Hope that helps.

gigaz2 · « **Reply #34 on:** September 10, 2008, 07:09:33 am »

I use a different method to align the cam on my other cars:

crank locked on TDC (the correct one, some makings are off)
cam roughly on TDC (both cyl1 lobes down)

rotate cam till a valve touches the piston, scribble mark, rotate to the other side, scribble. then find the middle of those two marks and assemble everything.

wouldn't work with the VW keyless system I know

just for reference: my franken renault 1.9D has two teeth of clearance each side

Mark(The Miser)UK · « **Reply #35 on:** September 11, 2008, 05:45:46 am »

Quote from: "TDIMeister"

I believe shortysclimbin is trying to get a gasser cam with its keyed nose adapted for a Diesel. tdi rs (Simon) did this when using an adapted gasser cam, and another member in tdiclub called mojogoes (Steve) bought this engine from Simon.

One can conceivably fabricate an adapter sleeve that's shrink-fitted over the keyed nose, and the male part tapered like the Diesel. Better yet, cut-off the tapered nose off a dead Diesel cam and bore/ream a hole with shrink-fit tolerances to go over the gas cam.

.

Why not size it so it is heat shrunk on, then drill and pin. Pin/s can be push fit as held in by covering taper on sprocket...

gigaz2 · « **Reply #36 on:** September 11, 2008, 05:53:13 am »

also good idea, but I'm going for the classic solution.

three part adjustable cam sprocket, inner part made from a gasser one, outer from a diesel one.

easy to adjust so timing can be spot on, and no worries of slipping

foxracer1 · « **Reply #37 on:** September 21, 2008, 09:30:40 pm »

I belive i am going to put a 2.0l cam in my 1.6. I am rebuilding a 1.9 head and installing rings in my engine so i belive i will do this then. It sounds like i should only have to mill the valve reliefs a little with the ABA cam. If the 1.9 head and loss of dynamic comp. from the cam is to much for winter use i'll put the 1.6 cam in it fot the winter.

Does anyone have the link to the write up about the TDI with the cam?

foxracer1 · « **Reply #38 on:** December 15, 2008, 06:31:53 pm »

No one has the link to the cam write up? I know i saw it once but can't find it now. I'm doing this next wknd and wanted to find some more info on it.

truckinwagen · « **Reply #39 on:** January 11, 2009, 11:04:35 pm »

does anyone know if they changed the gasser cam pulley over the years?
I have a MK1 gasser adjustable cam gear that I am going to modify to use the diesel outside, but I have a lead on a MK3 ABA camshaft, I was just wondering if there will be any issue putting the MK1 pulley on a MK3 cam.

thanks

foxracer1 · « **Reply #40 on:** January 12, 2009, 10:43:02 am »

They are all the same. You can use it on the ABA cam.

truckinwagen · « **Reply #41 on:** January 12, 2009, 10:48:23 am »

sweet, cause I already bought the cam, $50 shipped.

now we will have to see how well it fits, and how much piston machining it takes to work properly.