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Opinions please!
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Old 21 Mar 2009, 11:35 PM   #1 (permalink)
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Join Date: May 2008
Location: Cornwall
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Lightbulb Opinions please!

Having fitted a recon engine in my car, i'm wondering how many miles i should cover before i start 'unleashing the horses' lol. The engine has new piston rings ( on existing pistons i believe ), new big end and main bearings. New head gaskets etc. So far have done about 350 miles keeping it at a pretty much religious 3k but fook me i'm getting bored lol although the last thing i want to do is to have to end up taking the engine back out again!! I'm guessing about 1000 miles??? OPINIONS PLEASE!!
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Old 22 Mar 2009, 12:01 AM   #2 (permalink)
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Re: Opinions please!

If your engine was recond properly do you know if the bores were honed out before it was rebuilt?

Properly recond engines despite how good the bores look should have the bores honed to eliminate the chances of piston slap and to make sure the new rings seal properly, and then new pistons (very slightly oversized or maybe not depending on how much the cylinders were rehoned) installed with new rings etc... In my humble opinion there's not much point just putting new rings on old pistons. If you have the hole thing apart you may as well do a proper job.

Not doing this means that despite having had new rings it's still a very possible candidate for piston slap if it doesn't already or did suffer from it as the engine has probably done some proper mileage and the bores may well not be perfectly concentric due to general wear and tear.

Also having had new rings installed and bores rehoned hopefully you put running-in oil (mineral only based oil) for the first 1000 miles to break the engine in gently.

Hope it runs well for you.
'MY02 WRX Wagon - Powered by STi8'
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Old 22 Mar 2009, 12:54 AM   #3 (permalink)
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Re: Opinions please!

I bought the engine as a recon'd unit from Home - Mr Engine.net Specialists in Engines Gearboxes and Cylinder Heads so there is a certain amount of faith involved i guess. It does run sweet as a nut though, so fingers crossed
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