Any way of telling short of pulling timing cover?

 

Rotate engine to TDC on number 1 using timing mark on balancer, check number one to see if at TDC. You need a piece of stiff wire in the plug hole to feel the piston movement.

If it jumped a tooth, it is very loose. To see how loose, pull the distributor cap. Rotate engine by hand until the rotor moves. Then reverse the rotation by hand and see how far you have to turn the crank before the rotor moves. More than a few degrees means wear (some of which is normal, it's going to wear) and more than 1/8th turn means BEware, 1/4 turn means start pulling it apart.

Seriously, I'm not sure what the tolerence is for slop. 1/8th turn sounds like too much to me.

 

VERY good advice....

JR

 

Yea,..- what 85e150six4mtod said is pretty much on the money,..The Haynes manual will tell you pretty much the same thing, and if the chain is wicked loose,- you might want to inspect the inside of the timing cover as well because the chain slap will tear up the inside of it, and possibly make a real thin area on the cover which will be prone to a crack and leak.

 

Upgrade it to a double roller anyhow...it helps prevent a tooth jump in the future....

JR

 

put a timing light on it after pulling the spout connector. if jumped, it will be waaay off.

 

heh...NED that's too easy man...gotta do things the old school way lol.

JR

 

it wont run so be hard to test with light. I think its something else play is minimal when turning balancer and watching rotor

 

why the no start?

why suspect the timing chain?

 

HUH....................................??????????? ???

The relationship of the balancer to TDC has nothing to at all to do with the timing chain.

A jumped or broken cam timing chain has nothing to do with the harmonic balancers relationship with the crankshaft.

 

if it won't run, bump it around to the tdc timing mark on the crank and pull the dist cap. if not jumped, the rotor should be pointing right at #1 plug wire. if 180* out, turn the crank another rotation. if off a tooth or more, it'll be fairly obvious.
another thing that could have happened is the pin locating the dist gear has sheared or come out.

 

Ya thats what i tryed all looked good. I seem to have a severe flooding problem. I now seem to get intermittant spark.

 

Resurrecting the dead here lol. Do you recall how you fixed this? Mines doing the same thing

 

Could be the 10 cent roll pin split that holds the distributor gear on letting it move. Did a timing chain set one time for that. when you remove the cap and look at the slop while turning the crank it appears like the chain is lose but it could be the roll pin.

 

he last logged on 5-5-2008