How easy is it to bent a valve?

99SE-L · 10-14-2003, 03:03 PM

When I was doing my cam install, I put the colored chain on the timing marks of the intake and exhaust sprockets like how the manual says. Then I try to rotate the engine which spins a little and locks up. Before I didn't know what was causing it to lock up so I applied more force to spin it but it wouldn't. Now I just realized it was the valve and piston hitting each other. How easy is it to bend a valve?

james vick · 10-14-2003, 03:21 PM

It's gonna be pretty hard to bend it by hand power. I take it you were turning by the bolt in the crank. Get the timing right and see what happens. That is about all ya can do. If ya have the stuff you can do a leakdown test and see what happens. A compression test will work too.

99SE-L · 10-14-2003, 04:42 PM

Quote:

Originally Posted by james vick

It's gonna be pretty hard to bend it by hand power. I take it you were turning by the bolt in the crank. Get the timing right and see what happens. That is about all ya can do. If ya have the stuff you can do a leakdown test and see what happens. A compression test will work too.

Actually I turned it by spinning the wheels in 5th gear with a friend spinning the other side. I was so worried. Thanks for telling me that it's not easy to bend. What a relief.. =D

AZ WHITE SE-R · 10-14-2003, 04:49 PM

so you moved the crank with the cams out? make sure you put it back to tdc for cylinder #1 and that the cams are in the right orientation (10 and 12 oclock). you do not use the color marks unless you are assembling the motor from scratch.

99SE-L · 10-14-2003, 05:25 PM

I had it at TDC (measured by putting a long screw driver into the spark plug hole of the cylinder farthest on the passenger side) and the intake cam at 10 and exhaust at 12. Well it wasn't perfectly at those values but it was kind of close. I then aligned the colored markings on the intake and exhaust sprockets like the manual says and it would spin a little and then gets stuck. I'm wondering if a tooth has been skipped on the crank sprocket. Is it possible to see the crank sprocket by removing the oil pan? I need to know asap because I'm attempting to remove the front cover, as this is my only car. Thanks guys.

AZ WHITE SE-R · 10-14-2003, 11:45 PM

Quote:

Originally Posted by 99SE-L

I had it at TDC (measured by putting a long screw driver into the spark plug hole of the cylinder farthest on the passenger side) and the intake cam at 10 and exhaust at 12. Well it wasn't perfectly at those values but it was kind of close. I then aligned the colored markings on the intake and exhaust sprockets like the manual says and it would spin a little and then gets stuck. I'm wondering if a tooth has been skipped on the crank sprocket. Is it possible to see the crank sprocket by removing the oil pan? I need to know asap because I'm attempting to remove the front cover, as this is my only car. Thanks guys.

you cannot skip a tooth on the crank. make sure there are 20 links between the marks on the sprockets, and that you are dead on tdc and the the cams are exactly at 10 and 12. dont take off the front cover to see if the crank skipped a tooth. i am sure that it didn't

99SE-L · 10-15-2003, 01:39 PM

erased..........

gun_metalz · 10-15-2003, 05:38 PM

hey what about if the timming chain broke and you didnt know that and tried to start the car agian....wouldnt that make the pistons hit the valves benting it....thats what happend to me.....i drove for a while....parked the car..turned it off.....came back out to do the timming and turned on the engine an snapped the chain....didnt realize it so i cranked it agian twice.....open the valve cover and the chain broke.....
would that cause a valve to be bent.....?

99SE-L · 10-16-2003, 12:49 AM

Quote:

Originally Posted by gun_metalz

hey what about if the timming chain broke and you didnt know that and tried to start the car agian....wouldnt that make the pistons hit the valves benting it....thats what happend to me.....i drove for a while....parked the car..turned it off.....came back out to do the timming and turned on the engine an snapped the chain....didnt realize it so i cranked it agian twice.....open the valve cover and the chain broke.....
would that cause a valve to be bent.....?

Must have. When my timing was way off, I couldn't turn the engine due to the pistons going against the valves. Go run a compression test and find out. Either the valves are bent or you scrated up the top of the piston(which is not really that bad) or both.