Home > Guide, Technical > How To: Swap a Daihatsu YRV Turbo K3-VET into Myvi

How To: Swap a Daihatsu YRV Turbo K3-VET into Myvi

October 12th, 2011

First question is always, whether you should buy a Daihatsu YRV Turbo K3-VET half cut or an engine “kosong” or engine “lantai”. With a half cut, you can start the engine and test the gearbox, so you will know if it is in running condition complete with the wiring; whereas engine “kosong” or engine “lantai” has been removed from the car and may not be complete with wiring or may not be mechanically sound.

While the K3-VET and K3-VE are the same family of engines, the Daihatsu YRV Turbo uses subframe mount while the Myvi uses a 3 point body mount so this needs to be addressed. To transplant the K3-VET engine in, you will need a few things:

  1. Engine Mounting #1: Timing Chain Cover
  2. Engine Mounting #2: Gearbox
  3. Wiring
  4. Turbo Exhaust System
  5. Air Filter
  6. Basic Service
  7. ATF Cooler
  8. Cooling System

Engine Mounting #1: Timing Chain Cover

The timing chain cover on the driver side of the K3-VET does not have an engine mounting point. What you can do is transfer the timing chain cover from your original K3-VE engine to the K3-VET engine, or buy a new one for around RM8xx.

K3-VET Timing Chain CoverK3-VE Timing Chain Cover

Left:K3-VET without mounting tab, Right:K3-VE with mounting tab & engine mount

 

Engine Mounting #2: Gearbox

On the original K3-VE gearbox’s passenger side, there are 3 holes for the mounting to fit the engine onto the Myvi. You can either custom make a bracket or find a Daihatsu YRV K3-VET gearbox case that comes with the mounting holes. Daihatsu YRV Turbo R has the mounting holes, and some Daihatsu YRV Turbo have the mounting holes as well. It is always better to have the stock mounting holes than to make a bracket.

YRV Turbo K3-VET GearboxYRV Turbo R K3-VET Gearbox Mounting

Left:Gearbox without mounting points, Right:Gearbox with mounting points


Wiring

The wiring is essentially reversed between the YRV and Myvi, and to make everything work electronically, the wiring must be modified to utilize roughly 1/3 of YRV’s wiring and 2/3 of Myvi’s wiring. This is time consuming, and its best to go with a workshop that has done it before as they would have memorized the wiring diagram at the back of their heads. Don’t be a guinea pig!

Myvi YRV K3-VET Transplant Wiring

A glimpse of the wiring work required


Turbo Exhaust System

Myvi’s stock exhaust system is ~1.6″ which is not enough for a turbocharged engine. Get an exhaust system of at least 2″ in diameter. For reference, the Daihatsu YRV Turbo has a 1.8″ stock exhaust system.

D-Sport Daihatsu Boon Titanium Tip Muffler

D-Sport 2″ Titanium Tip Muffler


Air Filter

The stock YRV Turbo air filter box will not fit into the Myvi, so you’ll need to get a small pod filter to fit. The best place is on the driver side as the radiator on the passenger side gets very hot. The smallest Apexi Power Intake Filter model number 500-A024 will fit with the Apexi YRV adapter, or a custom adapter. Several smaller diameter K&N pod filters will also fit.

Apexi YRV Power Intake

Apexi Power Intake for Daihatsu YRV in Myvi

 

Basic Service

Get new spark plugs,  v-belt, coolant, engine oil, atf etc. Don’t be cheap on essential items. I’ll post a service guide for the K3-VET engine soon.

 

ATF Cooler

The weather in Malaysia is hot all year long, coupled with the heat generated from the engine and the stress of handling the torque produced, the gearbox is under a lot of pressure. Even the latest Proton Saga FLX and Proton Inspira comes pre-installed with an ATF cooler from the factory. It is definitely a must to ensure trouble free service for Malaysia conditions. You can use an oil cooler from kedai potong or buy a brand new one. Remember its better to get a good used one, rather than a cheap new one.

JDM Denso 13 Row Oil Cooler

Denso 13 row oil cooler salvaged from some Japanese car

 

Cooling System

The stock Myvi cooling system was designed to handle the heat of a 91 hp K3-VE engine. The K3-VET generates 138 hp, a 51% increase. You can add an additional fan for the radiator or even better, upgrade the radiator. The original YRV radiator can also be made to fit with extensive modification to the Myvi’s mounting.

Additional Myvi Radiator Fan

Additional 9″ radiator fan in front of the radiator

 

This is the basic necessity to transplant the K3-VET into the Myvi. It should take around 2 weeks to complete the job. If someone tells you they can do it in 3 days, walk away. To know if a workshop knows their stuff, you just need to ask about the mounting and wiring and see what they tell you.

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  1. October 13th, 2011 at 22:01 | #1

    Perkongsian info yg baik.. dah lama saya cari pasal info untuk K3-VET ni.. saya pakai myvi manual so bercadang nak convert kepada K3-VET.. tujuan supaya myvi saya jadi auto.. boleh ke?

  2. Jason
    October 14th, 2011 at 11:33 | #2

    @myvitrd
    Yes you can convert your manual to auto. You transplant the K3-VET together with its automatic transmission to your car.

  3. bob
    October 20th, 2011 at 08:52 | #3

    bro nak tanye la skit pasal yrv ni.. i baru masuk enjin yrv dkt myvi tapi dah 2 kali mounting yg dekat gear box tu patah sbb die custom tak ngam.. so i nak tanye pendapat u atau pon u ade contoh gambar mounting utk gearbox tu.. tq

  4. Jason
    October 21st, 2011 at 11:38 | #4

    @bob I don’t use a custom mounting for the gearbox engine mounting #2. You can give my foreman a call, Ferd @ 0126868210 as he has a mold to make the bracket. Tell him Jason sent you.

  5. li
    October 31st, 2011 at 00:06 | #5

    good info..i nak tanya,berapa kos upah untuK pemasangan engine k3vet ni..dan brake kena upgrade atau pakai yrv punya..?

  6. Jason
    November 2nd, 2011 at 00:35 | #6

    @li Depends on where you go, charges range from RM1000 to RM2000 depending on the package & arrangement. The YRV Turbo brake rotors are 246mm, a little bigger than Myvi’s 234mm. I highly recommend you to upgrade to even bigger ones from Civic or Corolla AE.

  7. ck
    December 9th, 2011 at 14:20 | #7

    Thanks for sharing informative post, I am using 5 years Myvi Manual 1.3 and start do research to plant yrv turbo. What is the total cost including installation labor cost?

  8. D
    January 5th, 2012 at 01:25 | #8

    Wow bro. Thanks for sharing the infos. They sure are very useful. Btw. Mind if u can share your gb serial code? I’m currently trying to compare The differences between the n/a auto gb vs. Turbo version. How about ur ratio? What’s the engine rpm @ 110kph in 4th gear?

    Thanks In advance

  9. trapaidze misha
    February 15th, 2012 at 22:27 | #9

    Where and how can I buy daihatsu YRV, gear shift box 8ATOUL125A822. Car Engine 1.3, turbo. Year 2000, the Japanese.

  10. trapaidze misha
    February 15th, 2012 at 22:28 | #10

    Where and how can I buy the gear shift box daihatsu YRV-8ATOUL125A822. Car Engine 1.3, turbo. Year 2000, the Japanese.

  11. sy
    March 4th, 2012 at 13:29 | #11

    bro…. jason.. where i can get timing chain cover at reasonable price? ? i already ask my friend at perodua. my friend told me that price around rm 950+++. do you have any info about that? because my myvi is 1.0/..?

  12. Max
    July 30th, 2012 at 20:28 | #12

    Bro.. My car is myvi 1.0, can i use my manual gearbox with the 1.3 yrv engine back?

  13. Vince
    November 12th, 2012 at 09:36 | #13

    Hi Bro,
    Can Naza Sutera use K3-VET engine???

  14. Jicco
    March 15th, 2013 at 00:30 | #14

    Hi bro,
    Thanks for making such informative website.

    I have a myvi 1.0 and it’s almost 9 years old now. Thinking of modding it. So I’ve read your guide and then I come across some ads on a website saying that the whole process of swapping YRV K3-VET over takes only aroudn 7 days with the total cost aroudn 5k-6k.

    In your opinion, are they trustworthy or do you also have a quick check list of what are the things we need to check. Eg. brakes, etc.

    Thanks

  15. Jason
    March 18th, 2013 at 10:28 | #15

    @Jicco

    I doubt it’ll take only 7 days. Maybe you should do more research about the workshop in question and see if it’s trustworthy. As explained above, the bulk of the work is wiring, which must be done carefully.

    You did not mention which workshop it is, thus I can’t comment.

  16. Jicco
    March 20th, 2013 at 00:51 | #16

    @Jason
    Thanks for the reply Jason.

    The workshop is call Xtuned Motorsport. I came across it from web search and also a write up on magazine. My goal is to tune my car for performance and some exterior changes. If could, I prefer to stick to one workshop for future maintenance and such.

    However, I have yet to pay them a visit.

    Thanks again for your time.

  17. Jicco
    March 20th, 2013 at 00:58 | #17

    @Jason
    Oh, and one more thing, do you have any recommendation of workshop(s)?

    Thx

  18. Chester
    May 7th, 2013 at 13:28 | #18

    Need ask about the air-con compressor. Can I use yrv turbo air-con compressor or I must need to use back Myvi compressor?

  19. Farid Ngah
    May 15th, 2013 at 21:03 | #19

    Hi Jason,
    Can u leave me the contact no and where the workshop to build this engine. I’m plan and find out the YRV engine for My Myvi car.

  20. aery lee
    May 28th, 2013 at 09:47 | #20

    yes i know this car.. wado sakura usj 1 workshop.. haha

  21. faiz
    May 28th, 2013 at 14:31 | #21

    bro..nk tanya kat mana nk dptkan set belting engine yrv yg baru? myvi pye boleh gune tak?

  22. Ariffin
    May 28th, 2013 at 15:50 | #22

    boleh cadangkan workshop yang boleh masuk yrv ke dalam myvi, sebelum ni ada sasaorang cadangkan saya ke Dpro semalam saya cuba contact dpro tapi dah lama ditutup

    t/k

  23. shamfad
    June 2nd, 2013 at 01:54 | #23

    Hi bro.just a few question to ask..
    1.rather than k3vet..is there others engine can fit into myvi?
    2.have u heard about supercharger kit plant into myvi?BOT VS SC…

  24. Jason
    July 13th, 2013 at 19:01 | #24

    @shamfad

    1. 3SZ-VE.
    2. Yes, but turbo is better.

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