Question about 1985 GMC S-15

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Magnet shavings inside distributor cap

Pulled my dizzy cap off and found metal shavings inside. my engine also has a hesitation while under load. are these shavings normal?

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Don't listen to (wisslindixy) clearly uneducated. your engine is not shot just because of metal shavings under the cap.Take the cap off and see if the distributor shaft has any play If it does that's were the metal shavings are coming from. It's a worn out bearing in the distributor shaft

Posted on Sep 11, 2017

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. No they are not . It indicates that the distributor shaft is either bent or loose on the drive shaft. allowing the rotor button to touch the pins in the cap. It may also indicate that the mechanical advance is failing.

Posted on Jan 23, 2014

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Posted on Jan 02, 2017

Wisslindixy

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SOURCE: Engine started overheating then, really loud

As you've already realised, this is serious. The engine is more than likely totally shot. Maybe a broken valve and punched a hole in a piston. Broken piston rod maybe. It's been overheated and also probably blown the head gasket and warped a head. You're looking at a complete engine re-build already. I think I'd just buy a rebuilt long block and start fresh.

Posted on Dec 29, 2010

Randy Ohler

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SOURCE: replaced distributor cap wires and

check air flow threw the engine. Catalytic converter could be clogged up. And when was the last time you replaced the fuel filter? Replace this first

Posted on Aug 06, 2011

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I own a 1987 chevy iroc z28 and have found metal shavings on my dipstick will i need to replace my engine or can that be fixed


Does it burn oil, smell oil filler cap for burnt oil smell, dipstick must be magnetized, unusual. Safest for you to drop the oil in a long clean tray for inspection, be careful of sump plug as it should also have shavings, note if shavings are small and short, if long, then bearings are seriously in danger, flush engine with quality engine oil flush fluid, put new quality oil in and filter, run engine for around 250 miles and re inspect, dipstick, sump plug, and oil, if significant shavings are found, change all mains and con-rod bearings, if hardly any or none, reuse oil and check after about 1000 miles.

Oct 19, 2014 | Cars & Trucks

2 Answers

Replacing distributor


well, to answer this we must know history, even the FSM states this.
its a toy engine so you have all facts online to match that engine.
1: it was wrong all along. timing ?
2: it was ok, time wise and want to just swap it out. ?

ILL shoot for the moon here, go easy way, #2
mark all wires. 1,2,3,4 (1 is water pump side, 4 is tranny side.0
mark cap terms too.
now transfer marks from old cap diz to new.
now remove cap on old
put crank at TDC such that #1 cap tower is at #1 wire.
this is called TDC #1 firing. (crank pulley marks are as FSM shows
then remove dizzy.
drop in new dizzy such that rotor still aligns with #1 cap tower term marked above.
clamp down dizzy
now do fine timing set running per FSM.

all this is at alldata.com and for if #1 is true, all wrong to start.

the above works for all dizzy cars made, mostly.

all this and more here.
vast info, all free too.
http://w ww.toyotanation.com/forum/16-archived-corolla-threads/9068-geo-prizm-toyota-corolla.html

Oct 22, 2013 | 1991 Geo Prizm

1 Answer

Turns over but wont start


With limited information , I would have to say start with checking, all fuses under the dash first.then check to see if its getting fuel , and if theres spark. The easiest way i found to do this is to take the top of the air cleaner off via the wing nut or bolt in the center, set aside ,use a flashlight to look into the tbi unit which looks like a carborator,stand on side of vehicle keep hands and face back as to not get hurt, and have someone turn the engine over, as its cranking there should be fuel squirting into the venturi to go into the engine if not possible bad fuel pump. to check for spark the safest way is to use a spark tester found at your local auto parts dealer or tool store harbor freight for $3.00, you unplug any of your spark plug wires plug it into wire and onto the spark plug, and again have someone crank the engine over, if no spark check all elecrical connections, if good check distributor cap and rotor which is behind the aircleaner, remove the aircleaner housing noting where the hoses went that you unhook set aside, theres two bolts on the sides of the cap i think there either 6 or 7 mm gently pull cap up being careful not to unhook the plug wires, turn sideways so you can look inside youll see silver nubs 6 for 6 cylinder 8 for 8 cylinder should be clean if not replace, also youll notice a plastic disk that spins inside the cap still attached to the distributor should have a small spring like peice of metal in center also should be clean and a little metal tab sticking out one end this should be clean as well , if these are all good then possible bad distributor control module its under the rotor two small bolts hold it in place and it plugs into your wiring harness. to reasseble just start here and read upward. pictures 1st distributor cap and rotor, 2nd is distributor control module, third the air cleaner assembly 4th is the tbi unit
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Sep 04, 2011 | 1990 Chevrolet C1500

1 Answer

Motor will turn over but no fire to the sparkplugs. Changed the distributor cap and still no fire


to be more precise,would really need to know the model of engine;4G64,6A11,6A12 etc.should be on vehicle ID badge.the 4 denotes a 4 cylinder,6 is V6,the earlier models have an external coil,or coil pack,the later models have the coil either inside the distributor under the cap.if external coil,remove the coil HT lead that runs to the cap from the cap,place near an area that is earthed and crank engine,should see a spark jump to the metal object.
Both early and later models run modules inside distributors.these often fail.Either can replace them or just get a second hand dizzy complete
Also crank engine with cap off and ensure that rotor is turning.I assume that this one fits into the end of cam at one end of the head,so this should not be a problem,but still check.the more that we find that is ok,the closer we get to what isnt.
hope this helps or get back with some more info and will endeavour to pinpoint problem.

Mar 21, 2011 | 1995 Mitsubishi Galant

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Hello I have a 2000 Frontier 2 wheel drive and I'm not sure what's going on with it, @about 2000rpm the engine wants to jump and spit and sputter I have replaced the fuel filter, plugs, wires, and the...


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Dec 30, 2010 | 2000 Nissan Frontier

1 Answer

1989 v6 camry engine missfire


no your problem is definately the dizzie cap, as i found out to my cost on a lansia beta. any kind of crack in ur dizzie will cause probs. best way to find out is park your car in the dark open bonnet with engine running then get a mist spray with water in it spray at dizzie and you will see a slight yellow arc around the crack! any crack in bakelite distributors leads to loss of one or more banks

Jun 11, 2010 | 1989 Toyota 4Runner

1 Answer

My 1993 has a rebuilt 350 k motor, it will idle around 800 to 1000 rpm's the rpm guage jumps when i drive, also the truck hesitates horrible, it will run great at top end but when starting off and in...


The distributor will have white deposits on each metal tap inside cap and the rotor will be worn down. Take a look under the cap try not to disconnect the spark plug wires just unhook the cap and turn it so you can look inside. That's the easy thing to do. If the cap has the deposits you need a knew cap and rotor I would get knew wires and check your spark plugs as well.

May 30, 2010 | 1993 Chevrolet C1500

2 Answers

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1 Answer

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1 Answer

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This also happened to my '95 mustang 5.0L I was actually driving when it lost power. Take the cap off of the distributor and see if the shaft wiggles. The distributor shaft in the mustangs are the weakest point of the engine. If the shaft wobbles the rotor will wobble hitting the points and may break the rotor. All the metal grinding will put little metal shavings in the housing where the magnetic pick-up will attract them, this is the problem. You can replace the magnetic pick-up but if the shaft is moving around you will need a new distributor all around.

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