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I'm getting really tired of this crap
by
jimfoo
on 08 Jun, 2008 13:57
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Driving up a trail today when the engine starts running away. I finally get it stopped and redo the plumbing to bypass the turbo, which is full of oil. Get it started again and it's running, but when I give it some gas, getting the revs up around 3k, it will start backfiring out the exhaust. So I get it turned around, kill the engine and slowly coast back down the trail. get to the road, start it again and slowly try driving to where there is a phone. I only get half way there when I no longer have much power to the wheels. I turn the engine off and after a while I figure out that I must have sheared all the flywheel bolts as the starter no longer turns the engine over, but will move the car. I'm getting tired of all this crap happening!!! :evil: :evil: :evil: :evil:
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#1
by
jtanguay
on 08 Jun, 2008 14:15
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what if the clutch was just soaked in oil? could it possibly slip enough to not turn the engine over???
damn that is some bad luck man
do you think its the turbo?
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#2
by
jimfoo
on 08 Jun, 2008 14:22
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No, the starter will move the car, so the clutch must be good, but the engine just sits there while cranking. I'm hoping for maybe just some bent valves, but with my luck.... Then again, I'm lucky the bolts didn't break when I dumped the clutch in gear to kill the engine, otherwise I'd have loads of engine pieces. It was scary how fast it was turning. Has to be the turbo as I could see loads of oil in it, and didn't have any blowby when I took the oil cap off.
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#3
by
burnt_servo
on 08 Jun, 2008 14:38
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when you gets things apart , i'd take a good look at the oil return tube from the turbo , making sure it's not even slightly restricted .
my heart goes out to you , i think most of us have been in similar situations where the work and bills keeps piling up from things breaking that shouldn't be breaking .
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#4
by
jtanguay
on 08 Jun, 2008 15:11
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No, the starter will move the car, so the clutch must be good, but the engine just sits there while cranking. I'm hoping for maybe just some bent valves, but with my luck.... Then again, I'm lucky the bolts didn't break when I dumped the clutch in gear to kill the engine, otherwise I'd have loads of engine pieces. It was scary how fast it was turning. Has to be the turbo as I could see loads of oil in it, and didn't have any blowby when I took the oil cap off.
if you pull the head be sure to take some pics... i'd like to see how those Prothe pistons took the abuse
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#5
by
jimfoo
on 08 Jun, 2008 18:12
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Because at the RPM's it was running at, I can't help but think the valves were floating.
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#6
by
zukgod1
on 09 Jun, 2008 21:09
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I think that even in a runaway injector pump, the governor in the pump should have prevented engine damage.
Ya if it was a IP runaway I agree. I wonder though....
That really sucks jimfoo, my engine just ate a turbo as well, filled the IC with oil on its way out.
Out of the 5 qts that was suppose to be in the oil pan over 4 were in the IC.
Less than a qt in the pan. I was VERY lucky I was in front of my house and had it in 3rd already so I could dump the clutch, I can only imagine what would have happened if my wife would have been driving.. I would be building another engine..
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#7
by
jimfoo
on 10 Jun, 2008 05:58
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Appreciate the valve offer. You know, this run away engine thing has me really glad I don't have an automatic. How would you stop the thing then? The way it sounded, there would be no way in hell I'd get out, open up the hood and block the intake. I'm actually going to work on some type of valve to block the air flow once I get everything else repaired. Also maybe some type of trap in the pipe to help hold oil, or at the very least, allow me to see if it's blowing oil so I can prevent it. Actually I was also thinking about putting a small diameter hose off the drain on the IC and running it back to the oil pan or valve cover.
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#8
by
zukgod1
on 10 Jun, 2008 07:55
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Actually I was also thinking about putting a small diameter hose off the drain on the IC and running it back to the oil pan or valve cover.
I was considering installing a drain in my IC just for giggles. Just a regular petcock off a radiator would be easy to install. would be nice to have a bung installed to thread it into so the petcock wasn't above the lowest part of the IC if that make any sense at all..
I also considered installing a small nipple like 1/4" and just hanging a short piece of hose off it with a plug in the end so the plug could be removed for draining then reinstalled..
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#9
by
burn_your_money
on 10 Jun, 2008 09:42
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[quote="jimfoo I'm actually going to work on some type of valve to block the air flow .[/quote]
Correct me if I'm wrong but don't TDIs already have this feature on them?
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#10
by
rallydiesel
on 10 Jun, 2008 11:33
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Yes they do. It's called an anti-shudder valve or intake flap valve.
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#11
by
subsonic
on 10 Jun, 2008 11:38
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Like a electric dump valve for an exhaust system, with the function reversed. Open would be normal, closed would be for run away.
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#12
by
burnt_servo
on 10 Jun, 2008 13:18
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i wonder if a large throtel body on the intake of the turbo , like off of a 5 litre mustang for example , would be strong enough to stop a runaway vw ?
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#13
by
jtanguay
on 10 Jun, 2008 14:55
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i wonder if a large throtel body on the intake of the turbo , like off of a 5 litre mustang for example , would be strong enough to stop a runaway vw ?
probably... the starvation of air would create quite a bit of vacuum though... would need to catch it right away before the airflow gets too high :lol:
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#14
by
jimfoo
on 10 Jun, 2008 16:00
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I'd put it right before the intake myself.