eCtune

Hi, a friend recently rebuilt a US 2000 Type R engine. Got new piston rings, bearings, head gasket, new valve stem seals, head studs, rod and main bolts, new pcv valve, and misc. gaskets. The car would burn oil and smoke, specially at light load and between shifting, so we assumed it needed to be rebuilt. But after all the work, the engines still burns the same amount of oil, and it's still smoking. I heard that Type R blocks, after many miles(or kilometers!) the cylinder walls tend to \"oval\" out. Any one with similar issues? Thanks............

did you have the block machined? or did you just put the new parts back into a tired block?

The owner said that he honed with his own honing machine, at a 60 degree angle, or something like that. But yes, it was honed. And as far as the whole cylinder ovaling effect, is that something you heard of, or is it made up?

valve stem seals on the wrong sides?

if the work was done by somone who really isn't a engine machinest, then it could be anything.. An improper hone can really mess things up.

The thing is, the car was doing exactly the same thing before and after the build. When the car first started to burn oil, the guy assumed it was a bad head gasket. He replaced that, but didn't do anything. After that, he then replaced all the other parts, but it's still pretty much the same. I figured that I wasn't the only one to know these kind of issues, but I have no clue what else could be wrong.......

Compression and leak down test results?

I doubt the sleeves ovaled out, pretty sure one would notice that while honing the block, that is unless they used one of those ball type hones. If I have to take a shot in the dark, I would look at the valve stem seals like naturalalloy suggested.

PCV valve stuck open?

standard rings or file fit

standard rings, pcv valve new, but it might be stuck...........

if you didnt replace the valve stem guides, the valve stem seals were pointless to replace. was the head redone at a machine shop or did the guy just replace the seals? if the guides are worn out and letting the stems walk around the seals are already destroyed. here are the specs.