G engine swap - Mercedes-Benz Forum
 
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post #1 of 6 (permalink) Old 05-08-2005, 07:41 PM Thread Starter
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G engine swap

I am getting a ,79 230G. Where can I find a replacement engine for my ,79 230G? How much does it cost? Where can I get an A/C retrofit system for my G?
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post #2 of 6 (permalink) Old 05-08-2005, 07:46 PM
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RE: G engine swap

Hey guys, this is my friend that has the '79 230G who I was asking all the questions for. I told him you all would be able to help him out with his G more than I probably could. Thxs !! [^]

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post #3 of 6 (permalink) Old 05-08-2005, 10:21 PM
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RE: G engine swap

I used to have the 230. The basic engine is from the 230 series sedans. The intake and exhaust is unique to the gwagen however. I think the 230 Gwagen engine was detuned to allow the use of poor quality gas though. So a short block form the sedans would probably work.

This is the M115 engine and this place will rebuild one for you - http://www.mercedesengines.net (thanks for a previous post on engine rebuilding for this link)

It is not a very peppy engine - maybe this would be a good time to upgrade to a diesel !
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post #4 of 6 (permalink) Old 05-08-2005, 11:27 PM Thread Starter
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RE: G engine swap

Does anybody know where I may be able to find a diesel? The newer the engine design, the better.
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post #5 of 6 (permalink) Old 05-09-2005, 01:22 PM
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RE: G engine swap

I currently have a 230, but cat really say its not peppy...while it's no G55 it's not that bad considering the wieght it's pulling. I am considering an engine swap though what's really involded and will the 3.0l 5 cyl diesel bolt right up to my 4 spd amnual? what else is involved?
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post #6 of 6 (permalink) Old 05-09-2005, 03:06 PM
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RE: G engine swap

For the swap from 230G to OM617A (5cyl 3 liter all iron turbodiesel):

At the least you'll need engine support arms and motor mounts from a 300GD. Then you'll need an oil cooler and lines from a 300GD. A radiator from a 280GE works well too (need more cooling than 300GD rad gives). I THINK you can use your existing transmission and bell housing, but not certain, 4x4 rancher would know better as he's seen a 230G up close and I haven't. You'll need a clutch and flywheel for that 300 turbodiesel and since they mainly came with auto boxes from the factory, your best bet is clutch and flywheel from a 300GD (clutch stuff from cars like 240D is way too light duty for G). Make sure the engine you get still has the flywheel from teh auto box as you'll need it to match-balance the flywheel you'll be installing. You'll also need a bunch of parts out of the car that donated the engine. Stuff like the idle adjuster cable, glow timer relay, overpressure shut-down plumbing, tach adapter, and probably more things I'm forgetting right now. The turbocharged motor will also want a larger exhaust than the 230 is fitted with from the factory, so if this hasn't already been opened out to like 2.5" front to rear, you'll want to do that. There are a couple minor mods to the fuel delivery system to eliminate the fuel pump and the in-line filter on the 280GE (fuel injected) but these might not apply to the carbureted 230G.

Can you see a pattern here? In my effort to put a 300 turbodiesel into my 280GE, I'm finding it's really obvious that the right thing to do is to start with a 300GD. If you're not emotionally attached to the particular G you have now, it's probably best to sell it, buy a 300GD, and start the swap to the turbodiesel from there. Just my opinion.

-Dave G.
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