Question about 1987 Ford F 150

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Distributor camshaft gear keeps shearing

I have replaced several pins,which seems to shear when the motor is at high rpm's. Whats causing this?. It happened again yesterday and i thought it was the pin again but this time the rotor shattered and the cap was broken on the sides.about 180% fromeach other

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Replace the distributor.The weights have collapsed causing this to seize.Thats why now its shattered

Posted on Jul 19, 2009

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I have a 96 chev. pick up with a 305 vortech I am getting fire from the coil to the dist. but nothing to the plugs


Two different things can cause this problem. (1) The ignition rotor has a hole burned in it to ground the fire or, (2) the distributor is not spinning due to a bad drive gear or sheared pin. The ignition rotor is more common failure but, the sheared pin or gear is likely. If the gear or pin is damaged,make sure the oil pump is not locked up. The oil pump is driven by the distributor when it is turned by the camshaft.

Mar 03, 2015 | Cars & Trucks

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4.3 vortec engines


If you done a tune up and the engine still is not running right. Before you go and replace alot of sensors and computers, pull the distributor out and check the drive gear on the bottom. if it worn even a little replace it. alittle wear will cause an engine to shake. i've worked on them were th engine was spittin and sputterin. the gear was chew about half way thru. replaced it and it purred like a kitten. to do the job you need to
1 pull the wires on one side of the cap and mark them
2 pull the cap
3 pay close attension to where the rotor button is pointing, mark the direction if possible
4 remove the 10 mm bolt that holds the distributor in place
5 pull the distrubutor up and out
6 check the gear. if there is no wear replace in reverse order
7 to remove the gear you need a punch pin, knock the shear pin out of the hole pull off gear and replace with new one. replace shear pin.
8 reassemble in reverse order.
good luck

on Jun 17, 2010 | Chevrolet Blazer Cars & Trucks

1 Answer

What connects the distributor to the can or is it one solid piece ? I'm asking cause I removed the distributor cap an realized the distributor rocks an doesn't seem to be connected to anything .


There will be some slop when you turn the rotor. More if your car is older and still has the mechanical advance. Should not be more than a couple degrees.

If you can turn the rotor 360 degrees around, the roll pin holding the distributor gear to the distributor shaft is sheared. A gear on the camshaft drives the distributor thru this gear.

Feb 07, 2015 | Cars & Trucks

1 Answer

1985 ford E350 with a 460 ci engine....have no spark when it cranks..replaced ingition module, coil and pickup, still no spark????


is the distributor turning as some of these had a problem with the driven gear at the bottom of the distributor shearing off the lock pin causing a no start as the distributor is not turning.

Oct 10, 2014 | Ford E350 Cars & Trucks

1 Answer

Mxrdrvr1030@yahoo.com


kia is bad for harmonic balancers , i had to replace my sheer pin and bolt in mine. poor design. not mechanics fault. be easy accelerating , keep rpm down

Sep 07, 2013 | Kia Cars & Trucks

1 Answer

I,m replaceing the timeing belt on a 2000 dawoo nabui it broke. I have turn the crankshaft over and over clockwise the camshaft will not move.could some one tell me I got problems.lol or what I well do...


is the new belt on and the camshaft still does not turn? if so you may have a pin sheared off in the camshaft that is not keeping the camshaft gear locked in place.

Aug 05, 2011 | 2000 Daewoo Nubira

1 Answer

Why isnt my rotor button turning


Possibly a sheared roll pin on the distributor or the gear is striped. Take the Distributor cap off with wires attached if there is room to move it out of the way. There should be a bolt at the bottom with a bracket, remove the bolt and bracket and remove the distributor, check the roll pin and gear to make srure there in proper condition. Both ends of the roll pin can be there but still sheared. Check also but hold the rotor button and turning the gear to make sure that the shaft is not broken. Gear is at the bottom.

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Jan 15, 2011 | 1989 Mitsubishi Mighty Max

2 Answers

Won't start


if you mean ignition rotor you need to replace the timing belt

May 05, 2009 | 1996 Volkswagen Jetta

2 Answers

My distributor wont turn!!!


how about the gear that turn distributor? it sprobably sheared also.

Jun 15, 2008 | 1983 Ford Ranger

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