Oil "Use" Ford 427/535 Crate

[Hotfingrs]

Originally Posted by blykins

Having the wrist pin intersecting the oil rings has absolutely nothing to do with oil consumption. If it did, then every 347 on the road would be using oil....as well as many other longer stroke engines in other engine families. It's a wives' tale and it's one that gets my goat every time I read it.

Oil consumption can come from several places and it doesn't have to be piston ring issues. Valve seals can wear out, valve guides can wear, PCV valves can go bad, intake manifold gaskets can leak.

Some careful investigating will let you know where it's coming from. I'd start by pulling the carb off and seeing if there's oil laying in the plenum. If so, then it's probably something like a bad PCV valve. If you see oil on the intake valve stems, then it could be valve seals or guide wear.

Sorry to get your goat, but these were on brand new engines, not just one but two. Every part in the engine was new. Burned a quart every 100 miles. Took the wrist pin out of the oil land, and not a drop of oil burned. BTW these were professionally built, not by me.

[blykins]

Originally Posted by Hotfingrs

Sorry to get your goat, but these were on brand new engines, not just one but two. Every part in the engine was new. Burned a quart every 100 miles. Took the wrist pin out of the oil land, and not a drop of oil burned. BTW these were professionally built, not by me.

Well, not trying to be a smart-alleck, but your sample size of 2 really doesn't represent the thousands and thousands of engines out there.

You would be shocked to see the amount of engines that not only leave my shop, but every other hipo engine builder's shop with the rings up in the wrist pin.

A 347 Ford is one of the worst situations with compression height...they are sitting at a 1.090" height, with the oil rings right up in there. I know of one particular guy with over 100k miles on his 347....no oil consumption.

The wrist pin intersection deal is just something that gets passed around the forums and it all stems back to a single faulty piston design from decades ago from Coast High Performance/Probe pistons.