Rebuild was done by a company that does only waterboxer rebuilds. I assumed everything was new but don't know. I never thought of revving the engine no load but going down the road. If an engine were old 800 miles to a qt. wouldn't be a reason to tear it down but this was a new rebuild. Should have sealed better. It's up to 1500 a qt now and I guess I'll live with that rather than pull the engine and have the rebuilder put a new set of rings in [his suggestion] Glad to hear about the rod bolts, I hope he used good ones.
Mike On 1/29/03 3:36 AM, "Robert Donalds" <bostneng@FCL-US.NET> wrote: > Mike and the list > > while its not uncommon for new rings to take there time seating I asked myself > a couple of questions as I read this thread. First did this rebuild include > new pistons and cylinders or just rings. what brand rings ? and did the > cylinders get straightened with a ridged honed and measured or did they only > have the a light hone to brake the glaze in hopes of the rings sealing. 800 > miles to a quart of oil is not a reason to take the engine apart but you need > to keep a eye on the oil level. > The idea of revving the engine with no load on it at 5K and holding it there > is foolishness even if you had a load on it that's no way to treat an engine. > The clearance of the piston to the cylinder cold is approximately one 1/3 > the thickness of a dollar bill and in all my engines I remove the pistons > rehone the cylinders and add .001th at least to fit clearance this also gives > me a chance check the rings and insure the cylinder is round. > The 2.1 engines originally had a stretch to yield con rod bolts and that is > a problem that develops over time not due to the RPM. On my rebuilt engines I > use the 1.9 rod bolts when I rebuild the con rods because I fell that is a > better bolt over the long run based on the measurements of the countless used > 1.9 and 2.1 rods I have inspected. > The fuel mixture if set to rich can dilute the oil and this could increase the > oil consumption and prevent the rings from sealing > Bob Donalds > http://www.bostonengine.com > all rights reserved > |
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