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Re: [T3] Running in new Pistons


On 22 Sep 2003 at 23:25, Mark Seaton wrote:

> From: "Keith Park" <topnotch@nycap.rr.com>
> 
> > Run the engine EASY for the first few hundred miles... oil change at
> 300-500
> 
> Will do! There seems to be a bit of a split of opinions concerning running
> in though (not on this list though!). I've definitely heard that the first
> few minutes are crucial and that the engine should be run hardish (2000 rpm
> continuous) to bed the rings. Maybe that was just for Porsche engines
> though?

2k really isn't hard at all. That's just low to medium RPM for an engine that 
is good to 5k.

> Looking at my engine now its in pieces it all looks in remarkably good
> condition. Since I know that its the original case I'm guessing that it has
> been rebuilt and not that long ago. The heads are perfect and the valves are
> all vw stamped. I checked the valve rock as per haynes and all the inlets
> are 0.2mm (which is better than the new spec!) and the exhausts on 1&2 are
> 0.35mm, and 0.55mm on 3&4. The limit according to Haynes is 0.8mm so they
> are still looking good. The heads show no wear or burning and the seats are
> all bright metal to metal contact.

This sounds fine. I think you're okay.

> I guess what I should do is get a second engine and rebuild that in my own
> time to perfection and get this one back together for now as best I can in
> the time I've got (has to be running next week) and do a swap as soon as the
> other is ready and sort this one out properly.

Yes, this is absolutely the right way to do it. Once you let yourself get in a 
hurry, you've lost.

-- 
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

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