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1.6 8V broke a rod

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Offline Jackdar

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1.6 8V broke a rod
« on: October 27, 2010, 06:47:28 AM »
Luckily didn't go through the block or do too much damage to the crank. Putting new pistons and rings, rod bearings, the one broken rod and all new gaskets. This is a 94 2wd Traker that I bought for my gf.
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1994 Geo Tracker 2wd
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Offline wildgoody

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Re: 1.6 8V broke a rod
« Reply #1 on: October 27, 2010, 09:03:57 AM »
OK, which rod? and why did it break?
They don't just decide to break, it's usually another
problem or did you just get lucky?

If I had to guess I would say it's #1 and your oil pump failed OR
the stupid pressure relief valve got stuck open and you went low
on oil pressure, either way, don't rebuild without figuring out why
it broke, or history might just repeat

Wild
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Offline bentparts

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Re: 1.6 8V broke a rod
« Reply #2 on: October 27, 2010, 04:08:55 PM »
That's exactly why I installed a good oil pressure guage. Never trusted the idiot lites.
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Offline Jackdar

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Re: 1.6 8V broke a rod
« Reply #3 on: November 02, 2010, 06:36:23 AM »
It was #1, looking at what was left of the old rod ,I found that it had been broken across the oil hole for a while(not a fresh break) just finally turned loose. I'm going back with a new oil pump and a oil pressure gauge just to be on the safe side. I think a previous owner may have been into the motor(RTV on oil pan..lack of timing belt cover).
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Offline wildgoody

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Re: 1.6 8V broke a rod
« Reply #4 on: November 02, 2010, 07:50:01 AM »
Do you mean the small end of the rod broke? I can't
remember any other oil holes in the con rods

Wild
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Offline Jackdar

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Re: 1.6 8V broke a rod
« Reply #5 on: November 02, 2010, 10:13:52 AM »
Big end...yep theres an oil hole
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1994 Geo Tracker 2wd
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Offline wildgoody

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Re: 1.6 8V broke a rod
« Reply #6 on: November 02, 2010, 07:03:03 PM »
OK, it's been too long since I dug into a Zuki engine I guess.
So was the rod discolored or at all darker that the rest of the rod?
or did it just let loose???
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Offline Jackdar

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Re: 1.6 8V broke a rod
« Reply #7 on: November 02, 2010, 07:18:33 PM »
No heat darkening at the break....guess the 163k miles did it in. And I have got an oil pump ordered before I finish the rebuild. Gotta get her Tracker right, gonna need my Dodge...getting to cold to be riding the Goldwing now.
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1994 Geo Tracker 2wd
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Offline wildgoody

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Re: 1.6 8V broke a rod
« Reply #8 on: November 02, 2010, 10:29:58 PM »
Must of been a defect in the forging, I had 230K miles on my
engine when I rebuilt it with the turbo, never had that failure,
but I lost an oil pump that about destroyed the whole thing

wild
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Offline Jackdar

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Re: 1.6 8V broke a rod
« Reply #9 on: November 04, 2010, 01:25:47 PM »
Oil pump is in....will report again after install
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1994 Geo Tracker 2wd
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Offline Jackdar

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Re: 1.6 8V broke a rod
« Reply #10 on: December 03, 2010, 06:41:52 AM »
Well I had to get a block....many thanks to Sean in Chesapeake. Thanksgiving guests helped pull the old one and came back Sunday to drop it back in. All is well now.
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1994 Geo Tracker 2wd
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Offline wildgoody

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Re: 1.6 8V broke a rod
« Reply #11 on: December 03, 2010, 07:15:50 AM »
What happened that you had to get another block?
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Offline Rhinoman

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Re: 1.6 8V broke a rod
« Reply #12 on: December 03, 2010, 11:31:49 AM »
I've seen a few break rods, they all had cracked blocks. I wonder if the block distorts and siezes the piston.
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Offline Jackdar

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Re: 1.6 8V broke a rod
« Reply #13 on: December 03, 2010, 12:32:55 PM »
Rod took out a section of the oill gallery...didn't seen it the first time I dropped the pan
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1994 Geo Tracker 2wd
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