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1992 Geo Metro Low Compression; Need Instructions
Topic Started: May 2 2011, 12:28 PM (3,233 Views)
merlywwn
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:die About a week ago I ran across a site where someone had an issue with a valve. Somehow fuel was getting into the 1st cylinder, and causing low compression. Short of having to rebuild the engine, I have exhausted my options and was trying to find that site again to see if maybe this might fix my current issue. It was for a 1992 Geo Metro with the 1.0 L 3 cylinder engine. If someone knows where I can find that page again, I would really appreciate it.
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merlywwn
May 2 2011, 12:28 PM
:die About a week ago I ran across a site where someone had an issue with a valve. Somehow fuel was getting into the 1st cylinder, and causing low compression. Short of having to rebuild the engine, I have exhausted my options and was trying to find that site again to see if maybe this might fix my current issue. It was for a 1992 Geo Metro with the 1.0 L 3 cylinder engine. If someone knows where I can find that page again, I would really appreciate it.
http://geometroforum.com/topic/4263424/
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Woodie
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merlywwn
May 2 2011, 12:28 PM
Somehow fuel was getting into the 1st cylinder, and causing low compression. Short of having to rebuild the engine
If you have low compression, there is usually nothing short of a rebuild that will fix it. Most Metros need rings and exhaust valves, even the ones that seem to be running well.
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mcmancuso
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Here's what you need, copied this from one of my other posts:

Personally, I'd recommend this:
http://cgi.ebay.com/ebaymotors/Geo-Metro-Pontiac-Chevrolet-1-0L-G10-Engine-Rebuild-Kit-_W0QQcmdZViewItemQQfitsZMakeQ3aGeoQ7cModelQ3aMetroQQhashZitem3cb537124fQQitemZ260738323023QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
$233 full rebuild kit, additionally pick up a felpro head gasket, the kit comes with one, but it has the small oil holes, the felpro is usually made right. Pick up 3 exhaust valves, the SS ones from 3tech are the best, but you can pick up some normal ones on ebay for ~$5-$10 ea. You probably don't need the pistons, but sometimes you open the engine up and one is broken, and the kit is cheaper than buying everything else separate anyway.

Grab a felpro head gasket at advance auto using this coupon, link: $35 off $85
And also pick up some plugs/wires/dist cap/rotor whatever else you'll need for the rebuild to get to $85 :D

I'd also recommend copper gasket spray (pick it up at advance auto) and put it on both sides of all gaskets including the head gasket, never had a gasket that was sprayed leak on me :D You'll also need some RTV either red or ultra black for the oil pan, and on the outside mating surface of the cam/crank seals.

You can rebuild the engine yourself in a weekend if you're hardcore about it, more like a week or two of taking your time an hour a day or so. You'll need a ball hone for the cylinders. There's guides here on how to do the head and the bottom end in the how-to area.
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pcss
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merlywwn, if you have low compression, first thing I'd do is pull the head and take a look. Most likely it's your exhaust valves. If you see that's what it is and you want to get out cheap for now, pour some gas on each piston and let it sit. If it doesn't leak down, just rebuild your head and hit the road! If gas does leak down, time to pull the whole thing. Hint, I'd pull motor and tranny together. Makes it alot easier! Good luck and welcome to the forum!
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mcmancuso
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You can do the rebuild with the engine left in the car as long as your main bearings are OK.
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