J37a2 build has begun for my '07 TL
#1
J37a2 build has begun for my '07 TL
Guess it is time to live up to my signature. This will be a semi slow build (6mo time frame). The build has begun today with the tare down of the J37a2 for a fresh rebuild. I will chime in the man behind the camera (yungone501). Once the short block and heads make it to my door step I will take over.
The plan for this block will be a good bead blasting, rings and a healthy cleaning. 37a1 heads are next in line to the machine shop for a scouting for any possible issues. Once I get a hold of the parts a pair of RL cams will be ready to set into their new homes.
Pics of the tare down:
The plan for this block will be a good bead blasting, rings and a healthy cleaning. 37a1 heads are next in line to the machine shop for a scouting for any possible issues. Once I get a hold of the parts a pair of RL cams will be ready to set into their new homes.
Pics of the tare down:
#7
J-series addict
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I checked all the tolerances and specs on the block. All checked out good. Also, due to the unique cylinder walls on the j37a2 blocks, the low friction/tension rings will adapt very easily to existing hone. At most, they will be glaze broken but there's hardly any glazing at all.
Heads will be dismantled and taken to the machine shop to be checked for any flaws or issues prior to mailing them out to you.
I recommend getting the block checked and cleaned professionally before starting any assembly. Especially since its all aluminum. Let me know what you want to do on this.
Heads will be dismantled and taken to the machine shop to be checked for any flaws or issues prior to mailing them out to you.
I recommend getting the block checked and cleaned professionally before starting any assembly. Especially since its all aluminum. Let me know what you want to do on this.
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#8
Dallas Chapter Leader (Midwest Region)
This looks interesting. Wondering how your going to wire it up? You can probably run the 07 ECM and not run into too many issues. Subscribed!
#9
J-series addict
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As for the question, I'll begin by saying that the j37a2 crank runs a crank trigger that looks similar to a front bicycle chain sprocket which is inside the crankcase right behind the oil pump. This trigger wheel is what the crank sensor "watches" to pull its high resolution data from which in turn is sent back to the ECM for fuel & ignition timing. The previous j-series engines such as the j32a3 or the j35a8 uses a much smaller and less resolution trigger wheel which is externally mounted on the crank snout where it is then watched by the crank sensor mounted on the oil pump. That being said, simply using the oil pump (along with crank sensor) and trigger wheel from a j35a8/j32a3 will allow this engine to work with what the OP decided on using which is the j35a8 ECM.
#10
Dallas Chapter Leader (Midwest Region)
Not much man! I'm over there quite a bit, i'll stop by next time! I know they changed a few things on the 3.7 but haven't really dug into one that deep yet like you have. You've obviously done your research on the subject. I would assume MOST sensors are similar location and connectors are the same maybe. The crank sensor would def be an issue, good thing the old style oil pump fits in the j37 block. I cant imagine too many differences aside from displacement, bore size, stroke and head design... COOLIO I wanna see this thing lol I'll swing by soon!
#11
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#15
Burning Brakes
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I ruined a set of valve covers having them powder coated already when I removed the baffles to clean them out all sorts of nastiness was in there and I accidentally drilled through the covers in 2 spots where its thin removing the rivets
There's a soda blasting process for blasting valve covers but the soda has to be neutralized afterwards before they can be powder coated
#17
Burning Brakes
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Would be nice if it was that simple they need the etch from blasting it to get the powder to stick soda blasting also doesn't etch it as much I'm looking at epoxy paint for a new set of valve covers I bought
The 07 08 covers are also a magnesium alloy they have Mg stamped inside of them
Sorry for the off topic, build should be nice
The 07 08 covers are also a magnesium alloy they have Mg stamped inside of them
Sorry for the off topic, build should be nice
#18
J-series addict
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This is very valid concern about sand blasting media contaminating the oil baffle on the valve covers. That's why they're chemically stripped instead. The factory coating on the covers is extremely durable and uses a special high-temp paint which is different from any form of powder coating I've ever stripped. It usually takes soaking them for days at a time before being able to scrape the coating off without strenuous effort. It's never a good idea to blast any part/component of an engine that has cavities that can trap the media, period.
#19
Senior Moderator
I ran mine thru a few cycles of the dish washer. I did it to my heads after porting and polishing as well.
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Majofo (02-14-2014)
#21
#22
Just noticed the nitrous bottles in the first picture.
#23
J-series addict
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And to Atlas, most of the bottles are full and they're all for sale. Feel free to contact me if you (or anyone else for that matter) are in need of some Go-Go juice. I have 10lb, 15, and 20lb bottles.
#24
Senior Moderator
^ I almost picked up a wrecked sh-awd tl for cheap a year or so back to convert my 2nd gen tl to sh-awd
#26
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Corey_Straker (02-06-2014)
#29
Dallas Chapter Leader (Midwest Region)
Is this motor going to be boosted or spraying nitrous? This is going to be one badass setup, ihope its not going to cost more than the car haha. I wanna build something now!
#31
Senior Moderator
If one were to do the work themselves it wouldnt be too bad. The car i found i could have picked up the whole thing for under 5k. 95% of everything i would have needed would have been right there. The rest would most likely have been just my time fabricating.
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#37
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#38
#39
J-series addict
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Or how about the worlds first boosted Mustang with j28 (j30 w/j25 crank) paired up with a s2k 6mt and rev that beeyotch to the moon and back...bet they wouldn't mind then!
Anyhow, now that I've got your block back, I'm going to do some block prep. First, it will be washed twice in a soap/water bath just in case any foreign material found its way into it between the machine shop, the powder coater, and my shop. While that's soaking, I'm going to prep the piston crowns, chambers, valve faces, exhaust valve stems (in exhaust pathway), and exhaust ports for ceramic coating. Basically just roughen the surfaces up a little and makes sure they are cleaned up very well so that the ceramic bonds well. All coated parts must be oven cured in a 300* oven before the coating is strong enough to not flake or fall off during reassembly or engine use. Most people simply allow the engine to complete the curing process but IMO the short gap between startup and full cure brings a good chance of flaking off. Depending on how much we have after all parts have been coated, I may try and coat at least the piston crowns twice for maximum heat insulation. Ceramic coating (or any sort of thermal coating) is often overlooked by many people but I'm a firm believer in not only its technology but also the principle of less heat that is transferred between a piston and combustion chambers, the longer life and less wear there will be on the entire engine itself. Not to mention a cooler running engine in general, more power due to a more complete burn on combustion, slight increase in compression depending on number of coats and the list goes on in more detail.
I'll update this thread as I get further into things. Until then, take care of my pony Jesse!
#40
Shop Talk update: Rob and I spent a good part of the the evening discussing a possible cam upgrade to something a little more 'beefier'. Anyone wanna chime in on this dilemma of balancing power with decent fuel economy as I commute approx 2500-3k miles a month?
If Rob had it his way we would "go big or go home" but I have to admit I love the two tanks a week I use for work apposed to what it could be :P
If Rob had it his way we would "go big or go home" but I have to admit I love the two tanks a week I use for work apposed to what it could be :P