95 g10 rebuild

jeremy_nash
Elite Member
Joined: September 16th, 2011, 2:58 am

September 23rd, 2011, 9:09 pm #1

My introduction post of sorts.

So I bought a 95 metro, 3/5. Motor in it has bad compression on a cylinder(motor from junkyard), it also comes with two other motors. one that was used in it previously, and another from a junkyard. I tore down the motor that was originally in it, and found a burnt valve, and a perfect bottom end. I figured I could pull an exhaust valve from the other head, lap it in and be in good shape. I have a few pics of the head and block of this donor motor.











Last edited by jeremy_nash on September 23rd, 2011, 10:50 pm, edited 1 time in total.
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Memphis metro
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Joined: January 20th, 2010, 2:06 pm

September 23rd, 2011, 9:59 pm #2

Good deal. Welcome to the forum.
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dayle1960
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Joined: June 4th, 2009, 1:45 am

September 23rd, 2011, 11:44 pm #3

Wow. That had to of hurt when the valve broke. I wonder what caused that type of failure. Too much rpm's or no oil?

If it gets less than 45mpg, throw it out and start over again.
When you pass 50mpg, smile, you've done something right.

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starscream5000
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Joined: August 5th, 2009, 1:42 pm

September 24th, 2011, 1:43 am #4

This is second valve drop I've seen on a Geo in the past week. The other person had ebay brand exhaust valves (thinking they were ITM). Any idea what brand these were?

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allmountain40
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Joined: March 5th, 2010, 12:20 am

September 24th, 2011, 2:23 am #5

Ouch! Yeah, never saw this in a metro untill the last week, now twice. Wonder if they have something in common?
Speed has never killed anyone....suddenly becoming stationary, tha'ts what gets you. Jeremy Clarkson from Top Gear
91 Metro 3/5 daily driver. .020 over block and pistons, bottom end balanced, 3tech performance cam, +4 cam gear, cold air intake, circa 1990 Enkei wheels, SSGTI rear wing, SSGTi front sway bar. Grant steering wheel. Turbo firefly engine on stand being built.
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Bad Bent
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Joined: December 26th, 2008, 6:38 am

September 24th, 2011, 4:49 am #6

Welcome to your new forum, jeremy_nash! :coffee

Smashing introduction :thumb .

In fact what happened to the #1 spark plug? :-/
Have fun...
BadBent
"The Filthy Beast" 1991 Metro Rescued from trip to junk yard. Aluminum underdrive pulley, Header, 218/350 3Tech cam/+10 gear, Bosch Plat. +4s, FlameThrowerII coil. K&N, Catco Cat., Jones glasspack, KYB, Vortekx Generators, Air dam, 7mm Ground wires, Ram Air, Mood Disk hubcaps and lowered & rear strut bar. No TB bridge. No A/C - Roof scoop works.
"Goody Two Shoes" 1996 Metro, The Wife's car. 3Tech "econo" cam, +10 gear, Al. underdrive pulley, K&N, KYB, Bosch, Magnaflow, Syn. & grounded. No TB bridge.
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Woodie
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Joined: February 13th, 2009, 12:29 pm

September 24th, 2011, 10:37 am #7

Welcome, nasty looking donor you've got there.

It's usually not a good idea to just lap the valves and put it back together. If going to the trouble to take it apart, you should put in three new exhaust valves and new rings on the pistons.


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bogs
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Joined: October 6th, 2009, 4:57 am

September 24th, 2011, 5:53 pm #8

:+1 and welcome to the forum :)

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jeremy_nash
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Joined: September 16th, 2011, 2:58 am

September 28th, 2011, 1:05 am #9

Well Woodie, that's really good info, I was gonna lap them, then fill combustion chamber with fluid to see if it holds. Well it didn't quite go that way, it is VERY evident the head had been gone through in the past, probably more than once, as there are major grooves all around the 2 good exhaust valves.
Gonna check price difference between standard valves and stainless, as I plan on saving gas for a very long time.
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jeremy_nash
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Joined: September 16th, 2011, 2:58 am

October 1st, 2011, 3:58 am #10

So got the stainless valves ordered from parts dinosaur. I'm planning on gasket matching the intake and exhaust. Any tips I should be aware of or things I should know going into this phase of the project?
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