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Bent Some Valves!

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Old Jul 25, 2007 | 09:51 PM
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Bent Some Valves!

Recently(last week) I bent some valve and damaged couple pistons in rebuilding my engine due to the timing went off! Can anyone walk me through seting up the right (proper) timing? To make sure it won't happen again!
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Old Jul 25, 2007 | 10:24 PM
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You are talking about your timing belt, right?

this is a writeup for a cam install, but it will walk you through how to get the correct cam timing.

http://www.evomoto.com/tech_info.php...3_6&tech_id=18
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Old Jul 25, 2007 | 10:27 PM
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you are rebuilding the engine, right!!!!

don't run the car with bent valves... and have a shop look at the head. make sure the new valves seat correctly.
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Old Jul 26, 2007 | 02:32 AM
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Id cry..
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Old Jul 26, 2007 | 06:14 AM
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I would not only check to make sure that the car is in time next time before you start it up, but I would also check to make sure that they install the timing belt tensioner correctly.
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Old Jul 26, 2007 | 06:42 AM
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TDC on number 1,
Make sure the cam dowel pins are up and line up to the valve cover marks.

Then to the bottom.

the lower timing belt sprocket has a mark and will need to line up to the timing marks on the block. should be lined up with you have TDC correct

the balance shaft (the one with its own belt) needs to be set to the timing mark. Make sure the crank is at TDC when u set this one up. put its belt and tensioner on.

the balance shaft behind the oil pump is a pain. it is possible for it to be out 360degrees do to its pendulum design and it being gear reduced. There is a port on the side of the motor with a bolt or set screw in it. Remove it put a small screw driver into it and it will lock the shaft in place when lined up to mark on the gear and front cover.

Put your timing belt back on checking to make sure all your marks are still lined up. and install the tensioner.

Once you have released the tensioner and you can spin the motor over by hand, do it a few times checking to make sure your marks all line up. 4 revolutions of the crank to get back to TDC and all marks should line up.
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Old Jul 26, 2007 | 06:55 AM
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http://www.fileden.com/files/2007/2/...000800-11A.zip
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Old Jul 26, 2007 | 12:35 PM
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Ditto what Greg said.
Any time you have to pull the timing belt off, or have the engine apart it is always a good idea to spin the motor over by hand first before starting it up. That way if there is any valve interferance it will be at an extremely low speed with minimal force behind it. You will be able to hear/feel the valve contact the piston and can stop turning the motor. It can save you a lot of time and money in the long run.
Hope everything works out for you.

-Bill@WORKS
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Old Jul 26, 2007 | 01:25 PM
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To add to what these guys said... DON'T FORGET TO PULL THE SCREW DRIVER OUT of the balance shaft, AND replace the plug!! As elementary as it is, you would not believe how many people forget one or both of these!
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Old Jul 26, 2007 | 03:15 PM
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Can someone check if my cams are installed right? My (the whole head)cams was intalled by the machine shop and installed together by my mechanic. I just want to know if it might be the cams(or the machine shop's fault)


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Old Jul 26, 2007 | 03:28 PM
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what is suppose to be the problem
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Old Jul 26, 2007 | 03:32 PM
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Thanks a lot man for this link!!!!
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Old Jul 26, 2007 | 03:44 PM
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There's no oil or assembly lube anywhere but nothing else is going to be evident from a picture.

Last edited by dentsportgarage; Jul 26, 2007 at 03:48 PM.
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Old Jul 26, 2007 | 06:18 PM
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Originally Posted by GregGSC
TDC on number 1,

the balance shaft behind the oil pump is a pain. it is possible for it to be out 360degrees...
I just gotta ask how it can be out 360 degrees
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Old Jul 27, 2007 | 08:48 AM
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visually, they seem to be installed correctly, but visually wont tell you much.
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