YotaTech Forums - View Single Post - Broke down in the '86 yesterday...gathering input

drew303 · 01-03-2008, 02:44 PM

I would rather do a timing chain than a clutch!

you couuuld do a manual compression test by turning the crank by hand.

This is a weird one. Do you hear any noise in the motor when you hand crank it? I'd pull all the plugs and have someone hand crank it while I examined the pisto heads w/ a flash light.

I can't imagine the timing chain skipping a tooth w/out actually taking some teeth with it!

This is a tough one for someone who isnt familiar w/ timing but Id put the motor at TDC and check where the rotor in the distributor lands. I personally know where it should be .. which is like 35 counterclockwise from 12 oclock.. ah its hard to describe. But it should land on #1.

I think if I couldnt find anything wrong with how it cranks or sounds and its not throwing codes and is getting fuel/air and the plugs are all gapped right (0.031" fyi) and not fouled.... Id pull the oil pan before I went into the front cover or pulled the head.

You can hand crank it with the pan off and probably hear/see more.

It's hard to diagnose this one without actually having my hands on the motor.

01-03-2008, 02:44 PM	#9 (permalink)
drew303 Registered User Join Date: Dec 2006 Location: Olympia, WA Posts: 2,032	I would rather do a timing chain than a clutch! you couuuld do a manual compression test by turning the crank by hand. This is a weird one. Do you hear any noise in the motor when you hand crank it? I'd pull all the plugs and have someone hand crank it while I examined the pisto heads w/ a flash light. I can't imagine the timing chain skipping a tooth w/out actually taking some teeth with it! This is a tough one for someone who isnt familiar w/ timing but Id put the motor at TDC and check where the rotor in the distributor lands. I personally know where it should be .. which is like 35 counterclockwise from 12 oclock.. ah its hard to describe. But it should land on #1. I think if I couldnt find anything wrong with how it cranks or sounds and its not throwing codes and is getting fuel/air and the plugs are all gapped right (0.031" fyi) and not fouled.... Id pull the oil pan before I went into the front cover or pulled the head. You can hand crank it with the pan off and probably hear/see more. It's hard to diagnose this one without actually having my hands on the motor. __________________ 1987 Pickup, single cab, 22R, new head, 260 cam TG 3" SAS, rear disc brakes, chromoly rear axles, Chromoly Birfs, Tcase brake, 37x12.50R15 MT/Rs, 5.29 gears, rear Aussie Locker, front Detroit Truetrac.