Last post on Nov 27, 2013 at 12:52 PM
You are in the Chevrolet Metro/Geo Metro
What is this discussion about?
Geo Metro, Chevrolet Metro, Hatchback
#1712 of 1867 Re: 1999 Chevy Metro won't run [johnkel]
Dec 27, 2009 (11:53 pm)
There is another stupid GM better idea on that car; called the ECM main relay. It is a cheap relay that is operated by the ECM; which can fail and shut everything down. Rock Auto gets $5.28 for the Beck Arnley relay # 2030133; or $27.79 for the equivalent AC Delco relay # 212360. Beck Arnley is usually top quality; but the unit in their photo is labeled "made in Taiwan." So this is one application where I might prefer the more expensive AC Delco unit. Incidentally; this relay is identical to the fuel pump relay and the fuel injector relay; so you might try swapping them out, just to see whether that brings back the spark. I believe these relays are located in or next to the underhood the fuse box; on the driver's side, in front of the shock tower.
#1713 of 1867 How to remove valve cover 3cyl Metro
Dec 28, 2009 (1:51 pm)
I just bought a 91 Metro 3 cyl a/t. Odometer: 129,000. The owner said that it had low compression in no.1 cyl. In starting, it spins like the plugs are out.. but starts up quickly and runs ok. In drive it shakes and with ac on, it will not idle. It drives ok and shifts ok but does smoke a little and uses a lot of oil. I attempted to remove the valve cover and the cyl head, but was unable to break the valve cover loose. What's holding it on ? Just 4 nuts holding it but it will not break loose. I suspect burned valves, but cannot check without removing the cyl head. HELP !!!
#1714 of 1867 Re: How to remove valve cover 3cyl Metro [crbobr]
Dec 28, 2009 (3:01 pm)
That valve cover can be a puzzle! I haven't removed mine, but I did take the nuts off, and found that the nuts attach to specially shaped studs, which fit closely in the valve cover. This suggests that the studs prevent any side movement; which precisely positions the gasket surface. Because of this, I expect that it will not be helpful to try moving the valve cover from side to side to break it loose. The only direction that looks like it will work is to pry it straight up, at as many different points as possible. There probably is gasket cement on the old gasket; which will make it that much harder to move.
#1715 of 1867 Re: How to remove valve cover 3cyl Metro [zaken1]
Dec 28, 2009 (3:51 pm)
That's pretty much how I saw it.. But I've tried for some time now and I'm afraid I'm going to break something.. There aren't many places where prying up can be safely done.. Anyone else got any ideas ???
#1716 of 1867 Re: How to remove valve cover 3cyl Metro [crbobr]
Dec 28, 2009 (7:49 pm)
The only other thoughts that come to my mind are that either the studs which the acorn nuts thread onto hold the valve cover down at their bottom end; so they also have to be removed (with some kind of special tool); or that there are some additional bolts which secure the timing side end of the valve cover, from inside the timing cover.
Dec 28, 2009 (8:45 pm)
The studs have small "gaskets". Pull straight up. Hard. The new gasket kit will have new ones also.
CHANGE that valve cover for a 93 or 94. Your 91 has a smooth top, the later ones are ribbed. The "tube" in the back of it is placed differently and you will not aspirate as much oil fumes. This is one of the culprits of you using a lot of oil. Don't forget to also get that small hose it is different.
Hope that I was of help.
Have fun and don't give up on your little three banger.
Oh and Happy New Year to all !
#1718 of 1867 Re: How to remove valve cover 3cyl Metro [crbobr]
Dec 29, 2009 (9:13 am)
Do not remove the valve cover yet. Remove spark plugs and check compression on each cylinder. Before you will crank the engine, remover the fuel relay - this will protect the spray fuel to combustion.
If you have low compression below 50 psi on cyl. 1 - you got bad rings or bad exhaust valve.
If you want check the rings are OK on cyl.1, put few drops of engine oil in cyl. 1 and crank the engine few times. After that, check the compression. If compression go up, you got problem with rings.
If you will check compression, on each cylinder - crank the engine 8 times on each cylinder.
Personally, I will remove the engine and rebuild. Good engine with 120000 miles should build up 175/185 psi easy.
To remove the valve cover - remove the nuts first - all of them and also the small ones. After that gently "bump" the cover with rubber hammer on all sides around. Should come easy.
DO NOT FORCE.
#1719 of 1867 Re: How to remove valve cover 3cyl Metro [pipeman]
Dec 30, 2009 (11:47 am)
Thank you for that informative reply.. I followed your instructions and found comp on #1- 30; #2- 45; #3- 160.. Adding oil in the spark-plug hole made no difference.. In an earlier post, someone suggested this problem could be caused by build-up carbon and named an additive to try before tearing engine down.. What do you think ? As to the valve cover.. Looks like to me.. there are only 4 small nuts holding the valve cover on.. I removed them and tapped with a block of wood and light hammer blows.. Does not break loose.. You say.. DO NOT FORCE.. Well.. If not force.. then WHAT ??? Thanks for your help..
#1720 of 1867 Re: How to remove valve cover 3cyl Metro [crbobr]
Dec 30, 2009 (12:23 pm)
The reason I suggested to the earlier poster that it would be worth running Techron through his motor, in case the valve stems were sticking; was because his car had previously been getting excellent gas mileage, and there was no mention of exhaust smoke or excessive oil consumption. Also; two of his cylinders had compression above 170. So that seemed like a likely candidate for Techron.
But your motor has been smoking; which is NOT caused by sticking valves, and the compression is worse in your motor than it was in the other one. So I think it is much less likely that Techron will work here.
#1721 of 1867 Back up lights.
Dec 30, 2009 (6:57 pm)
Other than the bulbs or the back up light transmission switch and fuse. What
else could stop the back up lights not to work?