Engine swap for 3.0 JDM

OddyseyNW · Dec 10, 2020

My 2006 EX-L needs new engine. Does anyone have experience with JDM alternatives?
I found several 3.0L VCM engines, all claim to be direct swap to 3.5L. I would like to make sure it fits before I buy one.

My engine is 3.5L with VCM - J35A7. Japanese imports I found are 3.0L J30A.

Thank you for your tips.

jiantao · Dec 10, 2020

I don't think the 3.0 and 3.5 are directly interchangeable?

If they are, that would be the first I've heard of that.

Even the VCM-1 and VCM-2 engines aren't directly interchangeable with each other.

Oddy-EarL · Dec 10, 2020

jdm 3.0 is the equivalant to the 3.5. it fits. they don' have 3.5 in japan, only 3.0. It's the same way with subaru outbacks 2.5 to jdm 2.0 swaps. but there are somethings that need to be looked at carefully when swapping. Ihave done several jdm swaps and on a nissan i had to drilll and thread a motor mount bolt hole. on an outback 2.0 i had to swap use orignal intake and cam gears.

WiiMaster · Dec 10, 2020

I think there was a thread here a while back about someone who swapped to a J30 and couldn't get it to run perfectly.

Oddy-EarL · Dec 10, 2020

I have done 5 here at work. no problems at all.

jiantao · Dec 10, 2020

Interesting! Does using the JDM 3.0 require ECU replacement too, or it works with the existing ECU?

Oddy-EarL · Dec 10, 2020

no ecu replacement.

GoHerdMan · Dec 10, 2020

These engines are common and due to that not too expensive. Why would you want to do that?

jiantao · Dec 10, 2020

Oddy-EarL said:
no ecu replacement.

Do those JDM 3.0 engines use VCM-1 as well? Where there is only 3 or 6 cylinder mode?

I thought that even the 2006 and 2007 US Odyssey engines, despite being the same engine, were not a straight swap since they had different connectors and wires due to the different transmission.

MrRangerZr1 · Dec 11, 2020

OddyseyNW said:
My 2006 EX-L needs new engine. Does anyone have experience with JDM alternatives?
I found several 3.0L VCM engines, all claim to be direct swap to 3.5L. I would like to make sure it fits before I buy one.

My engine is 3.5L with VCM - J35A7. Japanese imports I found are 3.0L J30A.

Thank you for your tips.

Not direct swap. Best to find a A6 motor, they are plenty out there.

WiiMaster · Dec 11, 2020

Found the thread I mentioned before

P0175 p0172 Help! 2006 odyssey exl

Hello Everyone! So, i swapped my motor to a cheaper j30. It runs fine but i cant get the codes p0175 and p0172 to go off. Here are my scan tool readings. Thanks in advance.

www.odyclub.com

OddyseyNW · Jan 11, 2021

Oddy-EarL said:
I have done 5 here at work. no problems at all.

Have you had any codes for rich fueling - P0175 or P0172?
I just installed 3.0L in my odyssey and got codes P0175 and P0172 - system too rich bank 1 & 2.
Long term fuel trim is -15%, which is exactly the engine volume reduction from 3.5 to 3L.
I retrofitted harness, injectors etc. from the original 3.5 engine.
I have 2006 EX-L, original was 3.5L VCM - J35A7. New engine is JDM 3.0L J30A
Thank you for any tips how to get the DTC away

WiiMaster · Jan 12, 2021

The person in the thread I linked seems to have the exact same issue, not sure if they got it resolved.

Kyontomlin · Jun 7, 2021

OddyseyNW said:
My 2006 EX-L needs new engine. Does anyone have experience with JDM alternatives?
I found several 3.0L VCM engines, all claim to be direct swap to 3.5L. I would like to make sure it fits before I buy one.

My engine is 3.5L with VCM - J35A7. Japanese imports I found are 3.0L J30A.

Thank you for your tips.

Kyontomlin · Jun 7, 2021

did you ever get the rich fueling issue resolved? I have the same issue with my swap

hpark21 · Jun 7, 2021

is the cost savings such significance that people are going to extreme measures to install JDM engine vs. ones that they KNOW will fit? Just wondering. I mean, I can not imagine JDM engine being as readily available as US bound engines.

MrRangerZr1 · Jun 7, 2021

JDM engines and USDM engines are different, like sensors, displacement, power output, etc. It will never run right due to difference in ECU mapping.

They are also more expensive when buying. Just find the same motor locally and put it in, what's the big deal.

Frankwhite120 · Dec 17, 2021

Any updates on the 2005 odyssey engine swap. I’m trying to get one done ASAP. I want to get a transmission also. Engine has close to 300k. Too many issues with leaks and noise also trans slipping

Frankwhite120 · Dec 17, 2021

Ok yea. I have 2005 Honda Odyssey touring. And is there anyone close to the BX to do the swap

MrRangerZr1 · Dec 23, 2021

Frankwhite120 said:
Any updates on the 2005 odyssey engine swap. I’m trying to get one done ASAP. I want to get a transmission also. Engine has close to 300k. Too many issues with leaks and noise also trans slipping

Like mentioned before, it won't run right. Just look for the same engine you have, they are all over the place, just have to look.

I know those JDM engines look nice pricewise but they won't work.

Engine swap for 3.0 JDM

OddyseyNW

jiantao

Oddy-EarL

WiiMaster

Oddy-EarL

jiantao

Oddy-EarL

GoHerdMan

jiantao

MrRangerZr1

WiiMaster

P0175 p0172 Help! 2006 odyssey exl

OddyseyNW

WiiMaster

Kyontomlin

Kyontomlin

hpark21

MrRangerZr1

Frankwhite120

Frankwhite120

MrRangerZr1

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