timing belt pix

[rabbitman]

I know this is old, but I did once lock the injection pump 180 degrees out while changes my timing belt.  No damage was done, it just wouldn't start.  I recommend finding TDC locking the injection pump then removing the timing belt for replacement.

There's also a mark on the IP pulley that aligns with a mark on the IP mount........I might have heard that some pulleys don't have the mark though.

Believe it or not, people have gotten these cars to run timed 180 out , idk how but it's never very good.

[92EcoDiesel Jetta]

Is it really possible to get the injection pump 180 degrees out? The injection pump sprocket is keyed to injection pump shaft. If the injection pump sprocket is lined up with the hole in the timing belt back plate and the pin inserted, doesn't that mean IP is not 180 degrees out?

I know this is old, but I did once lock the injection pump 180 degrees out while changes my timing belt.  No damage was done, it just wouldn't start.  I recommend finding TDC locking the injection pump then removing the timing belt for replacement.

There's also a mark on the IP pulley that aligns with a mark on the IP mount........I might have heard that some pulleys don't have the mark though.

Believe it or not, people have gotten these cars to run timed 180 out , idk how but it's never very good.

[79rabbit4dr]

There's also a mark on the IP pulley that aligns with a mark on the IP mount........I might have heard that some pulleys don't have the mark though.

Haven't seen this thread in a while... I've never tried (but always wondered) if the other small whole in the IP sprocket would lock in at 180* out. Buy a small thing of liquid white out and mark it before you remove it. Pictures help too.

[92EcoDiesel Jetta]

The other small hole is bigger than the correct small hole and the pin would be very loose in it. I guess if one is dumb enough to use the wrong small hole, one could put the pump any number of degress out.

There's also a mark on the IP pulley that aligns with a mark on the IP mount........I might have heard that some pulleys don't have the mark though.

Haven't seen this thread in a while... I've never tried (but always wondered) if the other small whole in the IP sprocket would lock in at 180* out. Buy a small thing of liquid white out and mark it before you remove it. Pictures help too.

[air-cooled or diesel]

I do believe the easiest way of finding TDC; Before removing belt!, is find TDC crank mark on flywheel, check for tdc at injection pump, check cam tdc(#1cyl). now you can lock pump with pin.
there are multiple tdc(s). four in each stroke; here we're interested in the combustion/compression stroke, and TDC, im wording it 'mechanical TDC', as cylinder #1 TDC is what we're shooting for. mark on flywheel gives you cyl#1 TDC, both cam lobes pointing 'up' on #1 is cam tdc, and pump locking with pin is injection pump 'tdc'apx. the 'up' (better described in earlier posts) of the camshaft lobes shows you your coming off compression stroke to injection(and combustion)(combustion is increasing/at end on compression cycle/stroke).
if the belt happens to be removed(for whatever reason) I believe the best way to get to TDC is to remove camshaft(Correctly), with cam removed find crank/flywheel tdc and pump tdc. you should consult Bentley for proper way to go from here, I'd just install cam at #1tdc and be fine, but the manual may include more, and the proper way to remove/install camshaft.
the TDC marks I have seen are all stock, and all my marks are on(not including wear). if your marks don't line up correctly I cannt help, but with 1 small timing hole(or the correct pump hole for pin) and lock pump with pin, and go from there. this is for standard/stock TDC marks.

[TylerDurden]

I do believe the easiest way of finding TDC; Before removing belt!, is find TDC crank mark on flywheel, check for tdc at injection pump, check cam tdc(#1cyl). now you can lock pump with pin.
there are multiple tdc(s). four in each stroke; here we're interested in the combustion/compression stroke, and TDC, im wording it 'mechanical TDC', as cylinder #1 TDC is what we're shooting for. mark on flywheel gives you cyl#1 TDC, both cam lobes pointing 'up' on #1 is cam tdc, and pump locking with pin is injection pump 'tdc'apx. the 'up' (better described in earlier posts) of the camshaft lobes shows you your coming off compression stroke to injection(and combustion)(combustion is increasing/at end on compression cycle/stroke).
if the belt happens to be removed(for whatever reason) I believe the best way to get to TDC is to remove camshaft(Correctly), with cam removed find crank/flywheel tdc and pump tdc. you should consult Bentley for proper way to go from here, I'd just install cam at #1tdc and be fine, but the manual may include more, and the proper way to remove/install camshaft.
the TDC marks I have seen are all stock, and all my marks are on(not including wear). if your marks don't line up correctly I cannt help, but with 1 small timing hole(or the correct pump hole for pin) and lock pump with pin, and go from there. this is for standard/stock TDC marks.

This topic is 3.5 yrs old....

[ORCoaster]

Like a Zombie.... It is backkkkk...  Bar the doors and windows.  Flame throwers everyone.  Go!