Oil Thrower?

[siteunseen]

I don't have one or remember having one. My FSM shows an oil thrower. Could there have not been one or did I lose it and my mind? It's an early '77 with a 2 row pulley. MSA has one for $1.70 for '70 thru '83 but no other parts places have a listing, Courtesy either. Will it really cause the crank seal to leak if I don't use one? 3 woodruff keys, chain sprocket on 1st, worm gear on 2nd and the pulley's on the last one. Everything seems nice and snug sitting on an engine stand. Thanks for any help.

[siteunseen]

Maybe this fellow, JT240Z, built my motor before I bought it. The purpose is to "sling" oil to lube the timing chain. The part can be left off and is recommended in high RPM engines to be left off. This is not only done by many engine builders, but is even written in the "How to Hotrod Your Nissan" book as a performance build modification. It explains quite well why to leave it off. It comes down to oil return rate and rotational resistance from the large amounts of oil in the timing chain area. Much of the oil returns back to the oil pan via the front timing chain. The slinger kicks the oil back up and keeps the chain bathed in oil at low engine speeds. The problem is it inhibits some of the oil it slings from returning back to the pan. This excessive oil is just generating resistance to rotation. Kind of the same effect as windage in your crank case.

Stock trim... It wont mater either way. Me... I've always left it off and have never had a problem. Street or race.

[olzed]

I have often wondered about the slinger.

I always thought it was to keep most oil away from the front seal. Doh!!:stupid:

[Jeff G 78]

I've raced the same engine with and without it and didn't notice any difference. I'll probably leave it off the next time I have the motor apart.

[siteunseen]

Well here again I'm at a quandary. Putting one on now that I've gone this far would be a huge bummer but would give me peace of mind. I don't know what I'll do.

[Jeff G 78]

I'd install it. It won't hurt anything and it only robs a small amount of power during high RPM operation.

[siteunseen]

Ok if I can find one will it be as easy as pulling the pulley and front seal? Will it fit through that hole? It doesn't look as though the lip is turned up more than 1/4". The pulley nose is that big isn't it?

[Jeff G 78]

If the cover is already on, leave it alone. I didn't realize you had it together. already.