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Old 06-02-2009, 08:06 AM   #1 (permalink)
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Default 93 geo metro LSI engine rebuild

I am currently attempting a rebuild in my 1993 geo metro LSI convertible. I bought it with over 100k miles on it, and it was running i guess decent at the time. Then over time the motor started to idle really rough, and i just kept on driving it.
Long story short i have a burnt exhaust valve on cylinder 1. heres some pictures which are fun to look at, especially if you have the same motor.


this was the cause of the bad cylinder. burnt exhaust valve.

the cylinder w/o carbon was the weak cylinder, the fuel/oil kept it washed. It was also brought to my attention that, the carbon should be even over the whole cylinder. cylinder 2 and 3's rings are gone you can tell because they arent covered in carbon.
this is a really fun first time rebuild for me. simple and small! (one person can lift out the motor with their hands)
its soo tiny!!
accidentally fell off the workbench.. whoops.
view from the hubble. you can see the svt too!!
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Old 06-02-2009, 08:14 AM   #2 (permalink)
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Talking follow up

here is more progress:

shiny cylinder walls which I was pleased to see

I measured these to spec with micrometers, and again to my delight, they were all to spec within +/-.002.

some of the rod bearings were pretty scuffed up, and will be replaced.

and since this is my first rebuild, I am open to any opinions and ideas that could help me in the end. thanks
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Old 06-02-2009, 10:24 AM   #3 (permalink)
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These engines are prone to burning the exhaust valves. One of the culprits is clogged egr passage in the cylinder head. Make sure to clean it thoroughly. The next thing to do is up grade the exhaust valves to stainless steel available from 3tech. They are more durable than stock valves. Judging from you're "whoops" picture, it appears that your cam gear might be bent. If so, replace it with an advanced degree timing gear, also from 3tech, as it will give you better performance and mileage too. Make sure that you do not reuse the original head bolts as they are one time use torque to yield items. Last thing that I would advise is to get a decent head gasket from Fel- Pro. Best of luck on the rebuild.
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Old 06-06-2009, 01:52 PM   #4 (permalink)
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doing this for the first time is a little stressful, not gonna lie. There are so many things that you need to research and make sure are perfect. Im beginning to think its almost impossible!!! i mean, inevitably you are probably going to miss something, right?

also does anyone know where i can find engine specs for the geo metroLSi? the haynes doesnt have all the measurments im looking for, for torque specs.

thanks
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Old 06-06-2009, 02:47 PM   #5 (permalink)
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Using a Haynes or Chilton manual to rebuild your engine is a recipe for a disaster. I managed to snag factory service manuals off of E-bay for $28 for my 91, and $36 for my 93. If you are in a hurry or don't have the cash,, go to Geo Metro Forums on the net. Mucho info there. Step by step how to's along with pictures that will help you get the job done.
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Old 06-06-2009, 08:59 PM   #6 (permalink)
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My Haynes manual has all the torque specs and measurements that you need to rebuild your engine. You just have to know where to look. They have them in two different places, at the beginning of chapters 2A and 2B.
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Old 06-07-2009, 12:24 PM   #7 (permalink)
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does anyone have a factory service manual i could buy from them? They seem to be very hard to come by. (specifically 93' metroLSi if one even exists.
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Old 07-01-2009, 10:02 PM   #8 (permalink)
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Quote:
Originally Posted by 91 ragtop View Post
My Haynes manual has all the torque specs and measurements that you need to rebuild your engine. You just have to know where to look. They have them in two different places, at the beginning of chapters 2A and 2B.
Thanks! My brother has not opened his manual yet. I think he already lost it. He has a really damaged exhaust valve. tried to buy a Replacement Engine but did not know where to go in order to have it fixed. Is the procedure for this same with above?Do you have any detailed procedures?thanks
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Old 07-02-2009, 12:47 AM   #9 (permalink)
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Default '92 Geo Metro LSi Hatchback Paperwork

I have all the paperwork that came with my '92 Geo Metro LSi Hatchback. IF there is something you would like for me to look up, just let me know.

P.S. I too also plan to rebuild my Metro. I just joined this forum because of your work.
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Old 07-02-2009, 05:22 PM   #10 (permalink)
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thankfully on ebay i just found a copy of the 1993 geo metro LSi factory service manual (for $20) and it is definitely going to be the most useful tool i have. It describes things in so much better detail than the haynes, it makes you feel like you cant go wrong!! and i hope thats the case

I am almost through with cleaning the parts, and there are just a few more things that i have to buy, but im almost to the point of putting things back together! hopefully it will be within the month. and dont worry ill post more pictures of how its going and of course, the finished product.
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