Ive been looking for a replacement engine for a couple weeks now but not coming up with anything beside 100k + used engines that I dont want to roll the dice on. Someone please tell me or let me know where i can find the information of which j37s i could use to replace the a4. I see Some imports of j37a but can find no definite answer on whether they are compatible or not. Thanks

 

If my J37A4 breaks, I will definitely install a J35Z6. What's wrong with your J37A4?

 

Oil Consumption and Bad cam. I want to rebuild it but i also dont want the car to sit. I read about the j35z.

 

What state are you from, what miles on the engine?
The J35Z6 is the only truly reliable engine (+400k miles without oil consumption) that is as similar as possible to the J37A4, which is inexpensive and can be installed without modifications.

 

ky 190k The more i read about it the more i think i might just do the 35 with the 37 heads. Plus that opens up a lot more options from me to find one locally.

 

This makes sense if you do it yourself and you have a free J37A4 head with good camshafts. If you want to pay someone to do the head swap and buy cams, it will be much more expensive than a used J37A4 with low miles.
I'm asking what state you're from because I might want to buy your J37A4.

 

I still need to post some pictures to the other thread when i was trying to figure out what the sound it was making was. You replied on that one too. The squeaker lol.

 

?

 

https://acurazine.com/forums/4g-tl-2...noise-1008776/

 

There's a 2013 j35z6 at my local junk yard. Took a look at it today. Idiots at yard were so concerned about pulling cats and battery that they cut the eng harness and broke the map sensor off the throttle body. Only grabbed the intake, mainly for the top plate. May go back for the motor later. It would be nice to pair it with the 6spd awd trans I pulled a while back.

 

In fact, you only need a long block, and everything else should be installed from the J37A4.

 

where's this one located. I'm in the process of looking for one now.

 

https://www.car-part.com/
What is your zip code?

 

41063

 

Here's a great option for $1200, give them a call, you might be within their free delivery radius.
Search Auto Parts :: Allgeier Auto Parts | Cincinnati OH
if you need it cheaper, then try this one for $750, but on the condition that they give you the VIN to check the service history and verify the mileage.
carthageautoparts.com strange, but this link does not work here, so just copy the address into the address line and then it will work

 

J37a4 overbored TB. Increase size of lower runners jpipe 69k zero oil burn .upgraded exhaust
Coparts Hamlake. Oil changed ever 5k Amsoil. Was mint until got hit from behind hit the front airbag errored out. I have closet full upgraded parts new high-cut bullet cams, hardened heads, sway bars shocks
& more.

 

What does J37a4 overbored TB mean? Did you completely machine out the aluminum cylinders and press cast iron cylinders into them?

 

The throttle body has been enlarged, choke thinned out larger than stock. I also have modified intake plenum, intake, hardened bolts for the heads. I put supertech springs, valves, stage 1.5ish vtec cams all in boxes. I was going to put a supercharger on it. Not regroumd cams but billet cams. My engine was mint, until my wife got into accident. Have all oem parts seals, modified cams plus aftermarket seals, shocks swaybars

 

It's scary to imagine how much you sell the engine for? These modifications just sound expensive, but are useless without a turbocharger.

 

cool story bro

 

Tucson, AZ

Pulled the motor today. Was a little over $300 with a $57 core charge. So around $250 with a 30 day warranty.

 

Yeah, i already built a j36 combining a j35z3 block, bored over .5mm and j37a2 crank, rods, dual vtec heads. I have about 8k miles since w/ no oil burning or other issues.

 

What's the point of bored over .5mm, the cylinders were very worn?

 

More displacement, plus it had 160k miles on the block. So, why not.

 

Then it's clear, but it's quite expensive.

 

Real rookie question to piggy back off this discussion... the 3.7 in my 2012 TL just broke down and I'm looking at either getting it rebuilt or putting in a new engine. Is my best option to find a J37a4 at a junk yard? Any advice would be super handy... I'm kinda out of my depth here.

Background info on the engine as it stands : check engine light started flashing on the highway. Code read cylinder 1 and 4 misfire so I checked coils and plugs, they're all fine. Had a mechanic replace all coils and plugs and run a compression test but the compression did not come up. That's where I am now... any advice?

 

I wonder why the compression didn't go up? Did the mechanic check the timing?
What is the mileage on the engine?

 

105k miles. Didn't ask about the timing to be honest but I will. I bought this car in 2021 and as far as I know it did not get the piston ring replacement done and Acura told me it's too far past the extension to get it done on warranty so I left it at that... It burns oil, usually end up topping up 1-1.5 quarts between changes.. Wondering if that's finally taking it's toll on the valves, could that explain low compression? Not sure what my next step should be. I'm getting a price for a rebuilt engine, and probably a price to rebuild this one.

 

Don't rebuild a j37a4 or any of the affected j37s from the excess oil burning acura tsb. The pistons and rings are very pricey in the aftermarket. The cams are also typically pitted on dual vtec head motors. I've seen a few TL J37s at the junkyards. The ones I saw had valve covers and rockers removed, making the pitted cams evident. Suggest finding a base 4G TL j35z6 engine and swap out the j37.

 

Your oil consumption is not critical and can be avoided with a more viscous oil. I think you need a more detailed diagnosis. It sounds like they want to deceive you. Does your mechanic have an endoscope to check the valves, cylinders and pistons?

 

The mechanic didn't say anything about the oil, that's my own inexperience trying to think of what could be the problem. I'll have to ask about timing and the endoscope to check the cylinder heads and valves.

 

Yeah that's what I've been reading on here, yikes. Anything funky to consider going to the 3.5 or is it not problem direct drop in?

 

I will only add that the J37A4 is not rebuildable because its cylinders are aluminum and there is no reliable technology for proper sleeving.

 

I'm seeing a lot more j35z6s locally for about half the price of the a4... does that sound accurate? Anything funny with using the 3.5 in the tl awd?

 

The only difference is that you will lose 9% of power and 7% of torque, but you will get a cheap engine with three times the resource.

 

No, outside the power difference. Obviously do the common things like timing belt and tensioner replacement, valve clearance adjustment. Retain the j37 intake and tb.

For gee whiz reference i've had both a j37a2 and j35z3 in my 8th gen accord, which are very similar to the j37a4 and j35z6. I'm now working on a side project, 2013 J35z6 paired to a 2011 TL SH awd 6spd manual trans.

Few pics:

 

Dope! Where'd you find the Z6? Anything you have to inspect before you go all in? Just got a quote to swap my 3.7 for a used 3.7 - $9000 CAD so I might be cooked. Might have to look at doing this myself.

 

$9000 CAD? Is this a Ferrari? J35Z6 costs here $1200-1500USD + 12 hours of labor. This is a maximum of $5000CAD. Moreover, you can’t be 100% sure that a used one is no worse than yours.

 

A junkyard j35z6 looks to be around 1200-1500CAD here as well but I have no experience buying a used engine... that kinda scares me. Mechanic is quoting 22 hours @ $125 shop rate, and $5k for a junkyard j37a4 so that's the ferrari price tag right there. He also gave me the option to replace just the heads for $6k... but I might just pull the heads off myself to see what I can see.

 

Congratulations, your mechanic is a scammer.
Regarding the used engine, the most important thing is to find out its mileage and VIN number, which is written on the rear head.J35Z6 are very reliable engines and it is very difficult to break them with poor maintenance.