20 Most Recent 1987 GMC S-15 Pickup - Page 4 Questions & Answers

The clutch is not disengaging

underneath the vehicle you should be able to see the cable yank on it and it should pop the hood if it detatched from the latch then take it to a shop and have them remove the grill to get at the latch and pop the hood

What year and engine size???

That'd be my guess. Get number one cylinder back up on top dead center and on the compression stroke. Pull the cap and make sure the rotor is point where it should be, if you made a mark. If it's pointing 180 degrees out, spin the motor around one more time and line up the dist. If it's a tooth off get a large flat head screwdriver, a flashlight, and a mirror. Peer down into the dist hole. You'll see the top shaft of the oil pump. Use the screwdriver to turn it counter-clockwise about the width of one of the teeth on the cam gear on the dist. Reinsert the dist and align properly.

I presume you have a timing light and that's where you're getting your reading. Come people might just say time it by ear at this point. On a 30 year old truck it may just be a matter of preference. I know people on both sides of the fence. About half would say leave it alone and time it by ear. The other half would say R & R it.

If you're going to be the one to bury the truck. You can leave it. Whose going to know as you drive by.

If it's going to Barrets Auction, R & R it.

tumbler inside mite be wore out, did you change ignition switch

I don't know that specific vehicle, but if its a hydraulic clutch it sounds like either you have a leak and your clutch fluid is low, or the master or slave cylinder could be bypassing internally. Check the fluid level in your clutch master cylinder. If its low, you should top it off with brake fluid and will probably have to bleed the system. Also look for leaks. You can probably find info or a video online of how to bleed the system. Its a bit hard to explain without illustrations or pictures. Not really very difficult to perform. Good luck.

drags down and then clicks? then is a dirty batterie post if that is not it, then there is a fuel problem to check, starting fluid spray through the intake air, make sure not to spray directly onto the map sensor.

THERE SHOULD BE A LABEL UNDER THE HOOD OR ON RADIATOR SUPPORT WITH THAT INFO.

Did you try www.craigslist.org

Have you taken off the pivot bolt or bolts at the bottom of the alternator? It might be a long single bolt or two short bolts where it attaches at the block.

I wouldn't spend any more money on it until I had that engine checked over by a licenced mechanic. It could be somethi ng as simple as leaky manifolds or more probably a knock which means a bearing has turned, or excessive play which means it is worn out.
You are likely to be in the market for another engine. Hope this helps.

loose on the starter this is where your vehicle gets its power from this problem is in your starting ccircit

If the punp is bad it won't run at all. Check the throttle body injectors to see if fuel is coming out of both injectors. Sounds like one of the injectors is not working. If one is not working you can check to see if it is the injector or wiring by switching injector wires and see if the problem changed from one injector to the other.

Standing in front of the engine looking down and the lower left hand side towards the rear of the engine is where it should be located. a picture of you engine compartments would be helpful. If you still can't find it, follow the positive wire from the batter terminal ( the red one) and see where it leads to, and voila, there is you starter.

why did the head gasket need replaced?

the metal plate in front of you has to come off there is a very thin clip that holds this .they make a com presser tool so that you can push it down to get the clip.after that is removed you will see the turn signal switch it is held in by three screws the top right one is hidden behind the switch .flip the turn signal like your going right . then pull switch out a little and let hang .then you will see a torx screw a T25 REMOVE SCREW.turn key to the run position then pull out. then reverse

There is a retaining pin on the carrier to hold the pinion shaft in place. With that our, it should come right out. It is a open axle, right?