94 engine into a 93 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-11-2011, 06:52 PM   #1
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Default 94 engine into a 93

Hi Everyone,
I have a nice 93 Bonnie, which unfortunately has thrown a rod! I found a 94 engine and plan on swapping. I've noticed a few differences, like the EGR, which I figure I'll just put my old one on.
If anyone has any helpful hints, I'd surley appreciate Them!
Thanks in advance,
Jim
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Old 09-11-2011, 07:01 PM   #2
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When you have your old engine out, check over all the mounts and sensors. Transfer over everything that needs to be moved before installing the new engine.
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Old 09-11-2011, 07:10 PM   #3
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Thanks Dan! What do you think about trying to un[plug the wiring harness at the bulkhead?
I see people talking about it, but it looks a little spooky to me.
Jim
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Old 09-11-2011, 07:15 PM   #4
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Can't say for sure on your year. But what I do when I pull a engine is start at the front bottom of the engine and start unplugging, then work up and over the engine. And finish at the rear bottom. Toss the wiring harness up on the windshield and your all set. Take the rear manifold off at the head and leave the manifold in the car.
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Old 09-11-2011, 07:26 PM   #5
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Wow, am I glad I joined this forum! Thanks for that tip on the exhaust! Do you know if anyone has posted the complete r&r engine for a 93?
Thanks Again,
Jim
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Old 09-11-2011, 07:45 PM   #6
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Not that I know of. But there is a write up in tech info under mechanical on how to remove a engine. For the most part, it'* all the same.
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Old 09-12-2011, 08:04 AM   #7
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You take a stock rear manifold off? interesting, I take just the two studs to the DP on stockers.

You can unhook the harness at the firewall. It'* one 7mm bolt. However then you have to play with the one vacuum line and the connectors to the pcm and transmission. If you flop it like Dan suggests, it'* a bit quicker.
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Old 09-12-2011, 08:10 AM   #8
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Thanks Bill.
Hey another question.
Books say to block up the tranny, and looking at the mounts I'm thinking it would sit OK without. What am I missing?
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Old 09-12-2011, 08:12 AM   #9
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This is in a Bonne? No need to block the trans at all. In a Gp or other top mount based engine, you need to. But the passenger dogbone always keeps the trans sitting nice and level (along with front and rear driverside mounts) in all the Bonne'* I have ever worked on.
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Old 09-18-2011, 09:00 PM   #10
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OK, she'* ready to come out. Taking my time, besides getting side-tracked all the time by various things.
Question tho: everything says to index the torque converter to the flex plate/drive plate. I assume this is a balancing issue. My new engine has its own drive plate. Should I switch 'em out, in other words keep my torque converter together with it'* original drive plate mate-up?
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