timing belt walking off gears..

[harris1169Orange]

ok just rebuilt my motor and what not, put stock cams and gears in for now to break the thing in... i keep having this problem.. my timing belt is walking off of the cam gears pulleys tensioner and water pump. new tensioner and everything.. all i cant figure out is why the fuck it keeps doing this..



picture of it walking.. any information would help greatly

[hercfe]

how tight is it? are the guides broke?

[harris1169Orange]

it's perfectly tight.. guides?? on the cams?? they're still intact, not broken..

[hercfe]

Quote: Originally Posted by harris1169Orange

it's perfectly tight.. guides?? on the cams?? they're still intact, not broken..

hmmm, balance shafts removed? it could be harmonic vibration causing them to walk.

[05plsrt4]

check crank end play.

[rico's-srt]

i know it might be a dumb question but is the crank timing belt pulley seated all the way?

[chuck's_srt-4]

You must not have installed the crankshaft sprocket onto the crank far enough. That, or you installed it backwards (belt guide toward block rather than away from block).

Here, straight from the FSM:
CAUTION: The crankshaft sprocket is set to a predetermined
depth from the factory for correct timing
belt tracking. If removed, use of Special Tool
6792 is required to set the sprocket to original
installation depth. An incorrectly installed sprocket
will result in timing belt and engine damage.

[porksword]

Either the crankshaft sprocket like Chuck said, or once I had that happen when my harmonic balancer wasnt all the way seated. It felt tight but I guess it was a little crooked. You can see from under the car, there should not be much gap there at all. I used a breaker bar and torqued the $hit out of it and a was well. (it sure beats taking all that crap apart again).

[tim421165]

Quote: Originally Posted by chuck's_srt-4

You must not have installed the crankshaft sprocket onto the crank far enough. That, or you installed it backwards (belt guide toward block rather than away from block).

Here, straight from the FSM:
CAUTION: The crankshaft sprocket is set to a predetermined
depth from the factory for correct timing
belt tracking. If removed, use of Special Tool
6792 is required to set the sprocket to original
installation depth. An incorrectly installed sprocket
will result in timing belt and engine damage.

i didnt think of the second part of that , wasnt aware that it was possible to do .

[nemiro]

I'm with the others, is the crank sprocket on all the way? There is a special tool for this job, which works properly.

[slyder]

From this pic the pulley with the tampered end must be the water pump. Not the crank pulley



-Slyder

[chuck's_srt-4]

Quote: Originally Posted by slyder

From this pic the pulley with the tampered end must be the water pump. Not the crank pulley


-Slyder

Correct. He needs to check out his crank pulley and see if it's pushed on the crank far enough, and also make sure it's not on there backwards.

[harris1169Orange]

k.. well i foudn the reason and it was probably THE dumbest reason ever.. the belt was facing the wrong direction.. its a black gates timing belt, they have to go on a certain direction or it will walk like this..

the crank sprocket was installed by the people at the motor shop, and boy have they done some messed up stuff that a simple full time mechanic had to fix thanks you guys, i appreciate all the help!

[Rick@RealTune]

[quote=chuck's_srt-4;7703892]You must not have installed the crankshaft sprocket onto the crank far enough. That, or you installed it backwards (belt guide toward block rather than away from block).



Its on backwards!

[chuck's_srt-4]

Quote: Originally Posted by Rick@RealTune

Quote: Originally Posted by chuck's_srt-4

You must not have installed the crankshaft sprocket onto the crank far enough. That, or you installed it backwards (belt guide toward block rather than away from block).

Its on backwards!

Holy crap! How does one screw that up? LOL!