Danger from camshaft moving?
#1
Driver School Candidate
Thread Starter
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I posted earlier about replacing my timing belt and I water pump on 05 Lexus ES330. I'm getting ready to put it all back together but I have a huge worry.
When I started the removed process, I made the mistake of removing the tensioner and timing belt before breaking the camshaft nuts loose. As I tried to loosen the belt there was some rotation in the camshafts while I tried to loosen them. I ended up putting the old tensioner in a vice and then reinstalling it. I then got the bolts loose and removed them.
I'm now worried about damage from this movement. The belt had been previously replaced by a mechanic a couple of years ago. He'd marked the camshaft pulley and the engine with red paint. The markings are at about the 2:00 point. The pulleys are no longer at that point due to movement while trying to remove those bolts.
To reassemble, do I just replace the pulleys (with notch in proper spot) and then rotate the pulley back to those previously marked spots?
I don't want to damage the engine by colliding the piston and valve. Any help and advice is really appreciated. Is there any quick/easy way to verify that's not already happened?
When I started the removed process, I made the mistake of removing the tensioner and timing belt before breaking the camshaft nuts loose. As I tried to loosen the belt there was some rotation in the camshafts while I tried to loosen them. I ended up putting the old tensioner in a vice and then reinstalling it. I then got the bolts loose and removed them.
I'm now worried about damage from this movement. The belt had been previously replaced by a mechanic a couple of years ago. He'd marked the camshaft pulley and the engine with red paint. The markings are at about the 2:00 point. The pulleys are no longer at that point due to movement while trying to remove those bolts.
To reassemble, do I just replace the pulleys (with notch in proper spot) and then rotate the pulley back to those previously marked spots?
I don't want to damage the engine by colliding the piston and valve. Any help and advice is really appreciated. Is there any quick/easy way to verify that's not already happened?
#2
Lexus Fanatic
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There should be marks on your new timing belt what brand do you have? As for the movement of the camshaft(s) nothing to worry about here you didn't damage anything.
#3
Lead Lap
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just line the notches on the cam wheel up with the backing plate timing mark. some movement is to be expected.
-don't trust someone elses marks, they might have got it wrong, verify for yourself.
the engine is a non-interference engine, so valves don't go below TDC anyway.
-don't trust someone elses marks, they might have got it wrong, verify for yourself.
the engine is a non-interference engine, so valves don't go below TDC anyway.
Last edited by ES300NZ; 01-11-17 at 04:27 PM. Reason: grammar
#5
Driver School Candidate
Thread Starter
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
just line the notches on the cam wheel up with the backing plate timing mark. some movement is to be expected.
-don't trust someone elses marks, they might have got it wrong, verify for yourself.
the engine is a non-interference engine, so valves don't go below TDC anyway.
-don't trust someone elses marks, they might have got it wrong, verify for yourself.
the engine is a non-interference engine, so valves don't go below TDC anyway.
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