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Discussion Starter · #1 ·
I had my timing belt go out while my mdx was idling, 207k miles on it! I am unfortunately I'm love with my car still, so I decided to just replace the engine. I have a mechanic friend doing the swap, but I have to order the motor and have no idea where to shop for one? And also need to know the part# ? to be sure I get exact same motor to bolt up proper. Where can I find the #? Any suggestions would be appreciated.. Thank you??
 

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First, have you done a compression test to make sure you bent valves? Or did you hear the "bang" indicating contact was made. Others have reported that at idle is your chances are decent no damage was done.

That said, finding a good used motor is somewhat of a crap shoot. LKQ is a good source and there are plenty of sellers on Ebay. Best practice would be to get the VIN for the donor car if possible and pull a CarFax to check for maintenance history, title history, etc. Watch out for flooded cars especially.
 

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Discussion Starter · #3 ·
Thank you. I appreciate the help. And no, I just read about interference motors and thought the expense of timing belt repair and miles on motor, would be better getting a new motor. What is the easiest way to check the valves? I also heard that a lot of mechanics may not be able to tell about the valve damage until they go through with the timing replacement? Which I would be out the 900 on that repair? So my guess is that one of those imported from Japan motors that have("approximately 55-65k miles")on them, which I have never heard of "approximate" miles on motors? Would be unwise? It is from a eBay seller? Only $ 1300.
 

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The cheap way out would be to buy JUST a (cheap - $10.43 for the cheapest option from rockauto.com) timing belt, and re-time the motor, then spin it up to see if it's got good compression on all cylinders. Yeah, kind of a waste of time, but a WHOLE lot less effort than swapping a motor (makes my fingers itch just to type that). You'll spend 5x more time chasing little detail stuff swapping a motor than you would doing the "mini-timing belt" job, and then replacing it - and the water pump, tensioners, etc. for real.
 

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If the engine is still strong, you might want to ask your buddy about a compression test and valve job to have any bent ones replaced, valves reseated. Maybe only a few are affected if any.

Heard good and bad about JDM engines. Though I might give one a try someday. Can come with a trans. The bad are mainly fakes or trashed. Be wary of eBay and craigslist. Research, Yelp, word of mouth, suppliers that actual shops use.

Good luck!
 

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I have an 03 MDX with 102k miles with a the roof caved in about 6"...cheap.
One owner before me with a folder full of service receipts. Including recent timing belt and water pump(100k service).
good tires too!
Tampa area.
 

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I have an 05' MDX Touring with a solid engine, dry as a bone, & feels like new still. I'm up the creek on a Transmission though & debating whether to part out or rebuild. Vegas area.
 

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Pretty sure bro, not all the way there, but I think it's cooked...purchased it this year (knowing it was going to need some lovin')...My Trans mechanic agrees, but wouldn't be 100 until opening it up (said tone ring loose & damaging the speed sensor)...I DID drive it from Salt Lake City to St. George with VTM/VSA/SEL/Triangles/Squares/& sausages all flashing, doing avg. speed 77mph without issue... Shifting to N when slowing down for stops.
After St. George gas refill, soon as I hit the on ramp, the killer light came on "A/T Temp"...4/5 gears would go, then hesitate, then just rev as temperature light kicked on.
I've seen it can be fluid, sensors, solenoids, & all that (will definitely consider 1st), but pretty sure it needs trans. The damn engine feels absolutely amazing though, better than my Maxima which I think is crazy.
I keep seeing that 05 & 06 MDX are outfitted with the BDKA & the rest of 1st gen are MDKA or BGHA? or something....mine has an MDKA... Were some 05 built that way, or possible prior owner swapped incorrectly? The rebuild kits online combine MDKA/BDKA, does it matter? The Trans. mechanic in Salt Lake said ratios & something else matter... There's just this 06 BDKA locally in Vegas i could get today is all.
 

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Yeah, if you do have parts roaming around in that tranny, damaging sensors... it's time to put the beast down. If you're not absolutely certain that's the case (maybe just a SWAG on the part of your mech?) then I would suggest doing one drain-and-fill. For the cost of four quarts of Honda fluid, you'll have at least a fighting chance of the problem getting better. Even if doesn't totally correct everything, it would be encouraging, and (if it was my car) would set me on the path of doing a couple more drain-and-fills, as well as probably replacing some solenoids and/or pressure switches. Of course, it would be a really fine idea to confirm any diagnosis with a laptop running the Honda diagnostic software (which lets you see what's going on with pretty much everything in the transmission).

Can't really help you out with the model of your tranny though... I'd suggest getting the same model in any event. Sometimes it's trivial to get 99% of the way there with a non-standard swap, and then you get to spend days trying to work out that last 1%.
 
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