A tooth on the doubler roller is 2*.
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06-23-2011
A tooth on the doubler roller is 2*.
06-24-2011
This really doesn't make sense to me. Which is why I am asking about the crank keyway. I've seen it get funky on others. Unlike the HB key, the crank key would cause that exact problem because then things wouldn't be timed properly.
One of the things I love about the 3.8 is that it's nearly the worlds simplest motor. Set balance shaft to cam, set the cam key to about 4 oclock, crank key to about 2 oclock and presto, your nearly timed right. Then the HB and sensors take care of the rest. Crank goes around twice and the cam once. So by lining up the dot you put the intake lobe in the right place. Degreeing is a good idea and it has a lot of merit. However it would be off a slight amount, not enough to bend rods like pretzels.
06-24-2011
Maybe Aaron is right. Maybe the gas hydrolocked it. I was getting a metallic sound when I tried to turn it over with the balancer on wrong. It also felt like it was binding (even with the spark plugs out). Maybe that was enough force to break/bend them. Because when my motor turns over, my pistons and valves are doing what they should be doing.
Last edited by Bedwards; 06-24-2011 at 09:53 AM.
06-24-2011
I'm not going to go back and dig through everything, but this is just a stock timing chain, right?Originally Posted by TheOtherNick
It depends on which sprocket is off, how much timing is changed.
06-24-2011
Who knows... Maybe the whole harmonic balancer/crank key thing messed up the position of the crank sprocket. However, after removing the sprockets, I inspected them, and made sure the keyways were in good shape. Me and my dad re-assembled it, and made SURE the keys lined up. From what I see from turning the motor over, and watching the lifters and firing order, the engine is timed right.
06-24-2011
The balancer can't change the timing. That chain is the one and only thing that controls what happens to valve movement. That's what has me stumped
06-24-2011
I don't remember, but when the harmonic balancer was on wrong, did the key come off the crank sprocket? So the cam didn't turn and the valves stayed in position so the pistons made contact? Like Bill said, pull the heads, or at least use an inspection camera of sorts through the spark plug hole.
06-24-2011
No the key stayed in the sprocket, from what I saw. I'll look at my car tonight. Going home in 20 minutes.
Last edited by Bedwards; 06-24-2011 at 06:42 PM.
06-24-2011
Pulled the head with the most pushrod damage...
I knew it. The valves DID NOT touch the pistons. It was timed properly the entire time. This proves that having your balancer on incorrectly (awful ignition timing) can damage your pushrods.
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