Engine timing chain installation issue

JARED02

MEMBER
2003 AUDI A4
3.0L
V6
4WD
AUTOMATIC
75,000 MILES

Hi sir, is there any way you can help me with this? I was changing my timing belt and one of the clamps moved and now my engine doesn’t want to turn. What could be the problem? I know the timings off but I fixed it and it still doesn’t want to move. Any suggestions?

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,709 POSTS

Hi,

This engine is an interference engine. In other words, there isn't enough room between the top of the piston and an open valve for the engine to turn. This usually results in internal engine damage if the timing belt breaks or timing is off.

Are you able to turn the engine at all? When this happened, were you cranking the engine? If the cylinder head covers are still removed, are there any valves open that shouldn't be?

Let me know. I attached the directions from the manual for the removal and replacement of the belt. Take a look through it and let me know if there is anything that helps or was missed.

Take care,

Joe

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Thursday, September 9th, 2021 AT 7:08 PM

JARED02

MEMBER
2 POSTS

Thank you sir, I appreciate it. It turns but not a complete cycle let’s say it’s at twelve o’clock it will only turn to six-o’clock it it’s like locked from there it doesn’t soca full cycle. But thanks I’m going to try what you said if anything I’ll let you thanks for your help.

Take care.

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Thursday, September 9th, 2021 AT 7:19 PM

JACOBANDNICKOLAS

MECHANIC
109,709 POSTS

Hi,

It sounds like we have internal interference. If you remove the valve cover, inspect the valves when you turn it 180 degrees. I have a feeling one isn't going to move and is hitting the top of the piston due to being bent and stuck. Or, if you have it out of time and haven't forced it, it may just require retiming.

Let me know. I'm interested in knowing what you find.

Take care,

Joe

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Thursday, September 9th, 2021 AT 8:06 PM