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torque specs

Joe Wilson
07-04-2008, 09:47 AM
Could someone please tell me the head bolt tightening sequence and torque specs for a 93 Geo 3 cylinder? I don't have a manual, have looked through the posts and can't find it. Thanks

Johnny Mullet
07-04-2008, 06:21 PM
55 Ft LBS and the pattern is basic start from center and work outwards in criss-cross pattern.

07-05-2008, 08:14 AM
It took way more than the limit of 75 ftlbs.on my tork wrench to take off my head, had to use a break-over-bar, whats up with that?

Johnny Mullet
07-05-2008, 09:18 AM
Same here. I had to use a 32" breaker bar to break them loose.

GM Line Rat
07-05-2008, 09:31 AM
Cylinder Head to Engine Block Bolts......54 to 55 Ft lbs of Torque.

Cylinder Head/Valve cover nuts ......5nm or 44 Inch lbs.

Geo Metro Cylinder Head Bolt Tightening Sequence. Make sure all bolts are installed and at least hand snugged down before beginning the sequence.

Joe Wilson
07-05-2008, 10:22 PM
Something else someone said in an earlier post: after engine is put together anti-freeze needs to have air pockets removed. I can't find the little nozzles on this engine to bleed the air. Does anyone know where these are?

07-06-2008, 07:50 AM
The aluminum block and steel bolt threads react to each other effectively gluing the bolts in place. They should be oiled before assembly, I think anti-seize compound would be better than oil.

There are no bleed valves although one of those at the throttle body would be a great idea. You bleed the air out by running it with the radiator cap off until the fan has switched on and off five times or so. Works a lot better if you jack the front of the car up so that the radiator cap is the highest point.

GM Line Rat
07-06-2008, 07:52 AM
I can't find the little nozzles on this engine to bleed the air. Does anyone know where these are?

There Isn't Any bleeder screws for the 91-94 Geo Metro 3 Cyl engines. Park the front end of the car on a slight incline (Front end approx 2" Higher than the back)......Fill the radiator full with a 50/50 mix of Green anti freeze and distilled water. Put the heater control in side the car to full heat, Leave the Radiator cap off the radiator, then start the car and let it warm up to full operating temp while adding the 50/50 anti freeze mix when needed as the level of the radiator goes down (and when the Thermostat opens). When the level stays near the top of the radiator (And the car is fully warmed up by check for heat at the heater vents), you will see the air bubbles occasionally escape from the radiator top (Cap Off). When you dont any more bubbles, and the radiator is close to full.......Put the radiator cap back on, fill the overflow bottle to the correct level, then drive the car for a day, and recheck the coolant level in the overflow bottle and refill as needed.

Joe Wilson
07-06-2008, 07:57 PM
Thanks for the replies guys. I think I can put the Metro back together again. It had a broken center exhaust valve, caused at least partially by a stopped up egr passage. We cleaned those (with the wire spring method), and as soon as the parts get here I'll finish up. Thanks again!!

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