Hi guys,

I'm looking at the above car and the crank shaft key has sheard because the large bolt came loose that holds it on the crank.

I have a couple of questions,

- Has any one got a pic of the hub that slides onto the crank behind the harmonic balancer ? I think mine has worn out as it rocks on the crank shaft. Part of the key is still wedged in the groove. Might be able to compare the groove to mine before I order any parts.

-Has any one got a pic of the end of the crank in good condition ? From what I can see it is in good condition, the groove is there for a key and looks good. No burrs, etc.

-Is the hub part of the balancer or can it be purchased separatly ?

Thanks in advance.

Josh

If the key sheared and the balance and pulley moved from where they are supposed to be fixed to the crankshaft while the car was running, it would almost certainly have bent a few valves at the very least.
At worst, there could be quite a bit of severe damage including bent rods, cracked/damaged pistons, etc.
Obviously you can't turn it right now to find out if it moves freely.

Also, if the crank bolt came loose, You can be pretty sure that it had been worked on recently, probably by someone not skilled in good shop practices (proper torqueing) and not very thorough.

If you're looking at this car to buy, I'd be VERY skeptical.

The lower chain sprocket has its own keyway, the pully has its own additional key , so if the engine runs and sounds normal its probably ok , the hub is available seperately, you will most likely need the new key , new hub, but you need to check the crank it could of worn the keyway too big, in which case your going to need a new crank

It's only going to be a project car so I've cut my losses and brought it.

I'm going to have a closer examination tomorrow, so Ill post some pics of the key way on the crank (on first look it looks ok).

I've cranked it over and it sounds fine, so that's one hurdle jumped over.

More to come.

Nulu - You're absolutely right, the pulley only runs the drive belt/accessories, the timing chain is a separate affair.
My bad!, sorry for the incorrect response kiwi-bloke.

No Problem.

Had a closer look and the key way is largley intact. There is a tiny chip in the centre of the keyway.

I propose I will get a second hand harmonic balancer / hub as it looks like the current one is damaged. I can get one for $50 NZ so its not a major cost.

If this proves to not fit properly, I have two options.

Second hand crank - just getting avaliblity and price locally.

OR

Engine swap - Can get one pretty cheap.

My question is, in terms of effort is change the engine, or the crank more involved?

From what I can see and engine swap is straight forward, the crank swap is not.