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Underbody braces, turbos and more!

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PostPosted: Wed Dec 16, 2015 1:02 am 
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Joined: Wed Dec 16, 2015 12:40 am
Posts: 1
Location: Picayune, MS
I recently purchased a 1994 metro xfi parts car. The body is rusted out beyond hope. I wanted a spare engine for my 1994 metro xfi. The engine would not initially start due to a rotted timing belt. I replaced the belt. It turned over and idled fairly well for having sat for about 5 years with old oil and gas. My plan is to rebuild and keep as a back up. How far should I go with the rebuild? The engine has 187k miles. :razz:

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Geo Metro Herd
1991 Geo Metro XFI - 182,000+ miles, status - lost in the wilderness 1997
1993 Geo Metro LSI - 157,000+ miles, status - parts spare, engine streams oil
1994 Geo Metro XFI - 187,000+ miles, status - parts spare, body not repairable
1994 Geo Metro XFI - 254,000+ miles, status - still running....


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PostPosted: Wed Dec 16, 2015 9:01 am 
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Joined: Sun Jun 10, 2012 8:12 am
Posts: 157
Location: Brainerd Minnesota
Level of build will be determined by the measurements, and condition, of the components. Valve job, head surfacing, block surfacing, and rings at a minimum. And that's only if the cylinder out of round, and taper, are in spec. New 3 ring pistons will be required since OE style 2 ring Xfi rings are not available. Just using 2 standard rings will not work. Boring the cylinders .020 over is not the end of the world. But it will guaranty round, straight bores.

If bearings are needed, consider going .010 under. Maintain .0008-.0009 clearance.
New lifters are $35 or less on e-bay. No sense trying to clean 185,000 mile lifts for that. Always bleed down before installing.
Large hole head gasket is a must for peace of mind. Many a build/refresh has turned into an oil farter because this was ignored.

For any machining, you'll need to tell the shop what spec you want. Otherwise you'll end up with a brand new engine built to worn out specs.

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1991 Metro Xfi Sport, Crower F12142 Cam, +2 degrees on adjustable sprocket, .020 Over, Balanced & Blue Printed, 3.79 final drive, WhiteLine Bushings Everywhere, 185/60R14's, TBI Bridge Delete, Edelbrock Air Cleaner, Stainless Header, 2 Inch Exhaust, Magnaflow GlassPack, Swift Twin Exit Muffler.


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PostPosted: Wed Dec 16, 2015 5:10 pm 
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Joined: Mon Dec 01, 2003 12:47 pm
Posts: 11669
Location: columbus, ohio
good info. ^^^^

imho, the rebuild needs to hold to the lower number tolerance specs found in the factory service manual. have your machinist keep it tight.

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