Blown Civic
Hey all! Been lurking for a while, decided to post.
My DD is a '96 Taurus w/ 3L V6, ~24mpg :eek:. Daily commute is ~35 miles, through mountains. I've improved my mpg 10-12% just by driving behavior modification tips I learned about here :thumbup:. Mostly easy starts and stops, and motion conservation, neutral gliding and gentle hill climbing. I'm wanting to go to something better on gas, and I have a project. It used to be my daily driver. It's an '02 Civic LX sedan with a blown engine (broken rod, hole in side of block), that, funny enough, still runs on the 3 remaining cylinders. It got pretty good MPG with it, I once got 42 on a road trip. My question is, what do I replace the D17 with? I've read about swapping in a D15 VX engine in older (92-95?) Civics, but didn't know if there was an option for my 7G Civic. I plan on pulling the engine this summer/fall and either replacing/repairing the block or swapping in a whole used (JDM, prob) engine. I realize the sedan is heavy-ish and might not like a smaller engine. Of course, there's the custom motor mounts and other junk needed. Should I just drop in a direct replacement, or is there another option? :confused: Thanks! |
Welcome!
There are several of us on here that have 7th Gen Civics. Mine is an 05 Sedan with a 5 speed. As far as I know, the only engine that will bolt to a 7th gen transmission is a D17. I don't think a D15 will bolt to your transmission. But, you could always swap out the transmission too. Is this an auto or manual? If you have a manual and swap in older generation's manual, you will be going from a cable shifted to the rod shifted. Then there is the ECU to reprogram and replace. A swap might end up costing more than the MPG increase is worth. I'd throw in a junkyard/Craigslist D17 (new timing belt, water pump, etc) and call it a day. If you have a manual transmission, you should be able to hit 40 MPG at a minimum. Up until it got blazing hot here and I started using the AC, I was able to keep a 40 MPG average in traffic. But, if you wanted to do something different, grab an EX/HX motor and HX ECU (can 7th Gen Civic's ECU even be swapped? I am thinking out loud...) and throw it in your car. Then, you can have a lean burn sedan! |
Okay, I just went to your garage. You have a manual transmission.
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Hello and welcome to the site.
I'm fixing up an 02' Civic LX too. :) I'd just replace the blown engine as well. The Civic can get very respectable mileage without something non-stock. |
Thanks Daox! GL on yer fix-up. My car had been pretty good to me, until the engine blew in the mountains in winter. That sucked. Oil everywhere, nice hole in the block.
OK, just found a craigslist D17 for $600 OBO. Though it's a VTEC and mine's not. I don't remember what it takes to make that work. |
Your D17 will bolt-on a D15 transmission, but there will be some shifter linkage fabrication (you have cable whereas 5th and 6th gen had rods). I don't know if the older engines will swap in, and there is a security immobilizer to consider in the 01-05 Civic.
Other thoughts... you could get the whole D17 Civic HX engine and bolt it in, needing the wiring harness, ECU, and HX transmission. That would give you a learn burn "HX/LX" or "HLX." Increase the complexity of that idea further and get a 1992-1995 CX/VX trans. More simply, bolt in a new D17 LX engine, keep your current harness, ECU, and then decide if you want to keep your transmission or buy an 2001-2005 HX transmission for its taller gearing. A 2001-2005 HX trans will bolt right onto your "new" 2001-2005 LX engine. BTW, I compiled as rigorously as possible a variety of transmission specs for these cars: http://ecomodder.com/forum/showthrea...tml#post378478 Welcome to "the fold." james |
The VTEC has a different cam and head. It also has a VTEC solenoid. I am not sure if you can run a VTEC engine without a VTEC computer. If you get the computer, the wiring harness is different. I think it's only the VTEC wire. I was looking into what it would take to swap mine over to an HX.
Did you check Car-Part.com--Used Auto Parts Market for a non-VTEC engine? |
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If it will bolt one way, it will bolt the other way. It's just a matter of some fabrication. |
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Lots of other fabrication may need to happen though (engine mounts, sorting out the wiring, etc). Also, there were flavors of D15 installed in these cars for the European market. |
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