damaging valves by hand!
02-02-2003, 05:52 PM
#1
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damaging valves by hand!
ok - I have four car nuts here, including myself, and two say that you can not bend a valve stem when turning the crank over without the timing belt on and two say that you can. can we get some clarification before someone whips out their semi-automatic grease gun?
02-02-2003, 05:55 PM
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It's all a measure of torque. If you turn it quickly and they ram together, damage will occur
how much damage is depends on how hard to try. Slow, carefull turning will not break anything
02-02-2003, 05:56 PM
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Hummm... be easy and watch the cam, lobes...
rockers adn what not. usaually i think you should be fine. I know you are for a 4cyl, should not be to different. So i sya no you cant, just don't crank the hell out of hte thing
02-02-2003, 06:00 PM
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Thank you...
I've got a 93 S4 with a 2.2 turbo - come to find out we have 4 bent valves - cyl 1 and cyl 4 intake - I know that nobody had the opertunity to crank it with a starter and I know that someone turned the crank with the belt off, but I would have asumed that they would have removed the cams before taking on such a task
02-02-2003, 06:09 PM
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Re: damaging valves by hand!
Howdy! If you have the spark plugs pulled and the engine on a stand you can hand spin a crank quite quickly. If you monkey'd away you could damage the valves for sure. If the engine is in the car, spark plugs in, connected up to a transmission, then hand turning a crank isn't as freewheeling, thus harder to do, but if you were really hammering away to spin it and whacked into some valves...
Cheers,
Cheers,
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02-03-2003, 12:13 AM
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10V turbo is interference, 10V NG/NF...
is not officially listed as an interference engine from the factory...
There has been talk of the NF/NG engine damaging valves ONLY if the belt breaks at high rpm.
Even then it's rare...
Steve
Michigan
There has been talk of the NF/NG engine damaging valves ONLY if the belt breaks at high rpm.
Even then it's rare...
Steve
Michigan