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Just Got Worried...


devotion
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Putting back together a 76 2002 that has been sitting for the past five years.  The car was a runner (evidence is that it had to be running in order to run into the back of a suv). According to PO it was a "strong runner"...his daughters car. Anyways, I have it parked on my driveway at a slight incline, and noticed it is rolling down the hill when in gear and the emergency brake is off. My thoughts are

 

A) low compression

B) Clutch needs adjusting?
 

After sitting for 5 years, is there anything else anyone can think of that may be causing this? Oh, also the motor is still in the car, but the intake/carb is off.

 

I will go and buy a leak down tester tomorrow and try that out, but I really hope thats not what is wrong.

 

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Did a bit more "testing"  Put the car in ger and sure engouh, started to roll back...stopped with brakes just fine. Tried it again, didnt go anywhere. Put in clutch, rolled with no resistance. Braked again, still in gear (alternating between reverse and first) and started to roll again. I can hear the motor turning. Its like it holds when pistons are in a certian positing, but not in others...any thoughts?

 

 

Thinking out loud here, bare with me.  If the motor has been sitting for some time, and the oil has all settled...rings wouldnt be sealing as well, correct? Maybe try a little oil in the cylinders via spark plug hole?

Edited by devotion
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Maybe try a little oil in the cylinders via spark plug hole?

Is there any spark plugs in it at the moment? Just a thought.

Did something in the gearbox break when the crash occurred? Does it seem to shift OK? Does it roll in all gears or just 1st? Some more thoughts.

Beaner7102

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Differential okay?  Though usually when the spider explodes, the engine moves independently of the wheels.

 

Quite possible that something drastic and presently not visible happened when the daughter hit the Stupid Useless Vehicle.

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I recently left my car in gear on about a 30 degree incline (parking brake was broken at the time) and ran into a friends shop for a few minutes.  When I came back the car had backed itself down the driveway about 20-30 feet and was almost out into the street.  I don't think it is necessarily a sign of a problem, just a matter of physics.  Is the force of gravity greater than the forces at work inside the engine under the given set of conditions.

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Are you sure you're hearing the engine turning and not something else?  If the engine took a hit in the accident and got moved, the guibo on the driveshaft could have been broken apart which would make the car roll while in gear.

Edited by Brandon
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Guibo...quite possibly the coolest car part name ever. Not broken...It is the engine that is turning, I can clearly hear pistons going up and down. Not to worried now that a few have chimed in and mentioned these motors being fairly low compression to begin with. Going to hook up the new manifold and carb in the next week or two and see where Im at. Thanks for all the ideas

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It does really depend on the incline....and ofc the compression of the engine does make it easier or harder to turn them.

 

Why don't you order a cheap compression gauge of off amazon or something? Good way to get it out of your system and very easy to use.

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