help with timing belt
Thread Starter
Pit Crew
Joined: Jan 2019
Posts: 152
Likes: 38
From: Florida
help with timing belt
I am having a concern with a timing belt replacement. Figured it was overdue, 06 with 117k original belt. The old belt did not look bad. Putting on belt, tensioner, water pump, and both pulleys. The problem that I am having is...after aligning all three marks and rotating crankshaft, all three marks move one tooth. Rotate the crank a few times again and the marks are 2 teeth ahead. The plugs are out and the crank rotates freely. I took the belt completely off to start over with the same results. I always thought that after a few crank rotations, the marks should be back at the starting point. This is not only the cam alignment changing but the crank as well.
Lexus Test Driver
Joined: Dec 2014
Posts: 8,213
Likes: 949
From: Fl
I am having a concern with a timing belt replacement. Figured it was overdue, 06 with 117k original belt. The old belt did not look bad. Putting on belt, tensioner, water pump, and both pulleys. The problem that I am having is...after aligning all three marks and rotating crankshaft, all three marks move one tooth. Rotate the crank a few times again and the marks are 2 teeth ahead. The plugs are out and the crank rotates freely. I took the belt completely off to start over with the same results. I always thought that after a few crank rotations, the marks should be back at the starting point. This is not only the cam alignment changing but the crank as well.
your biggest concern was the correct installation of the belt...let me see if I have a good pic of my belt.
Lexus Test Driver
Joined: Dec 2014
Posts: 8,213
Likes: 949
From: Fl
Lexus Test Driver
Joined: Dec 2014
Posts: 8,213
Likes: 949
From: Fl
you will need to turn the belt many times to get back to the beginning...stop looking at that.
if you lined it up correctly the first time, you are good to go.
Thread Starter
Pit Crew
Joined: Jan 2019
Posts: 152
Likes: 38
From: Florida
thank you, I will give it a go! I did notice that even though the marks on on the belt moved, while the crank pulley mark is at 6 o:clock, both cam gears are lined up correctly. I guess that is the important part.
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Lexus Test Driver
Joined: Dec 2014
Posts: 8,213
Likes: 949
From: Fl
why dont you line it up, take three pictures and post them here...we can verify if you like.
also, you have already confirmed a piston won’t it a valve by turning it over by hand.
i guess you already pulled the grenade pin on the tensioner...
Lexus Test Driver
Joined: Dec 2014
Posts: 8,213
Likes: 949
From: Fl