Timing System Redone - Now Starting/Starter Issues?
04-17-2009, 09:08 PM
#1
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Timing System Redone - Now Starting/Starter Issues?
I was working on replacing the oil pump when things went sour. I never did get the old pump out. I decided to close things back up.
The engine was at TDC, and I installed the timing belt, all rollers and tensioners, the balance belt and closed things up. Turned the key to have absolutely no action from the starter, as if it was attempting to turn the engine, but it couldn't.
Turns out I put the crankshaft timing belt sprocket on backwards, and it was grinding against the inner timing cover preventing the engine from spinning. I'm an idiot.
Spent another 3 hours taking the timing system off again, turned the sprocket around, and closed things back up. Turned the key.
The Starter now spins. In fact, it spins WAY too fast, at least much much faster than it used to. Instead of cranking the engine at 1-2 revolutions per second, it's spinning it around 8-10! It's never done this before.
Any idea what might be going on and what I didn't do correctly??
The engine was at TDC, and I installed the timing belt, all rollers and tensioners, the balance belt and closed things up. Turned the key to have absolutely no action from the starter, as if it was attempting to turn the engine, but it couldn't.
Turns out I put the crankshaft timing belt sprocket on backwards, and it was grinding against the inner timing cover preventing the engine from spinning. I'm an idiot.
Spent another 3 hours taking the timing system off again, turned the sprocket around, and closed things back up. Turned the key.
The Starter now spins. In fact, it spins WAY too fast, at least much much faster than it used to. Instead of cranking the engine at 1-2 revolutions per second, it's spinning it around 8-10! It's never done this before.
Any idea what might be going on and what I didn't do correctly??
04-18-2009, 07:52 AM
#3
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You have verified directly the crankshaft is actually spinning that fast, rather than the starter turning over more quickly than before?
In other words, is the starter actually properly engaging the flywheel?
In other words, is the starter actually properly engaging the flywheel?
04-18-2009, 11:41 AM
#4
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Well, I didn't think it wasn't engaging the flywheel. It sounded like it was pulsing, that sound you get when a normally working starter engages the flywheel, only much much faster.
I just tore apart the front end AGAIN and it seems that the timing was perfect. Balance shafts slipped out about 20 degrees during tensioning, but that wouldn't cause these issues. Here's what we look like:
I just tore apart the front end AGAIN and it seems that the timing was perfect. Balance shafts slipped out about 20 degrees during tensioning, but that wouldn't cause these issues. Here's what we look like:
04-18-2009, 12:45 PM
#5
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Had the balance shaft sprockets in backwards too. Fixed though. I don't know how I did that actually, but it's irrelevant to the case, I'd think.
04-18-2009, 01:34 PM
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I think one thing you've got to consider is whether your starter motor is actually engaging your flywheel -- you might have damaged teeth or starter gear.
04-18-2009, 01:49 PM
#7
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Well I just got it all closed up and the engine IS turning when the starter is turning. It's no longer turning at psycho revolutions, but it's not starting either. It doesn't sound the same as it did, and it's backfired once when I attempted. I'll try to get a video of it.
Car IS at TDC. This is verified THREE times, and redone twice. Distributor rotor points to ~4-5oclock. Engine just spins. Few sputters out the tailpipe, but nothing else.
Car IS at TDC. This is verified THREE times, and redone twice. Distributor rotor points to ~4-5oclock. Engine just spins. Few sputters out the tailpipe, but nothing else.
Last edited by ExitWound; 04-18-2009 at 02:57 PM.
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04-18-2009, 08:53 PM
#10
Instructor
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Here's what we did tonight
We're totally lost.
- Reset the timing a 4th time to Top Dead Center. OT in Flywheel viewport, Cam at markpoints, balance shafts on markpoints.
- Tested for Compression. No compression on any cylinders.
- Flipped the camshaft 180 degrees.
- Tested for Compression. No compression on any cylinders.
- Inspected as best we could the valves and rockers from the camshaft case ports. They all look to be moving up and down smoothly and without hesitation or binding.
We're totally lost.