Max Capacity Posted July 2, 2015 Share Posted July 2, 2015 Yes, interesting... 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
boxkita Posted July 2, 2015 Share Posted July 2, 2015 I work at SIA, in the body shop. I went over to the engine shop a few months ago when I was doing the 2009 OBXT. The new motors don't use buckets anymore. They have roller rockers but, the lash is set with small caps that cover the end of the valve stem. They are of various sizes like the bucket method. It was explained to me that the valve lash is calculated and set by an assembly machine. Then checked by a human readjusted if needed and then further down the line it is checked again by a machine (after the head is on the motor). They weren't running at the time. It would be hard to get over there while they are running as I am expected to be near my line diligently waiting for a break down:rolleyes: I'd like to get that calcuation/program, as its the same one the FSM uses. It was explained to me that the valve lash is calculated and set by an assembly machine. Build my car Boxkita Track days Link to comment Share on other sites More sharing options...
rmoore5 Posted July 2, 2015 Share Posted July 2, 2015 "Calculated" is a my fancy word for adjusting the stack up of the valve stem and the lash cap to cause output of a linear transducer fall between 2 values in the PLC. Another thing is the price of the "valve shim" vs the "lifter" is approx $8 vs $26 retail. Link to comment Share on other sites More sharing options...
boxkita Posted July 3, 2015 Share Posted July 3, 2015 "Calculated" is a my fancy word for adjusting the stack up of the valve stem and the lash cap to cause output of a linear transducer fall between 2 values in the PLC. Another thing is the price of the "valve shim" vs the "lifter" is approx $8 vs $26 retail. I'm guessing the machining costs are much less, too. The valve lash bucket has some very close tolerances. thanks for info. Build my car Boxkita Track days Link to comment Share on other sites More sharing options...
1-3-2-4 Posted July 3, 2015 Share Posted July 3, 2015 Something else I found interesting: The new motors have the big end of the connecting rods split at 45 degrees to the length of the rod. This allows the piston and rod to be installed as a assembly rather than the way the previous engines had to put together. As the rod bolts can be accessed after the crank and case halves are assembled. Also, the connecting rod big end is literally split (fractured) at the mating surface rather than having 2 ground surfaces. The mating irregular shapes apparently cause the halves to align, if you can envision the surface of 2 pieces of broken cast iron. I've been dieing to find a picture of the bottom end and trying to picture this. All it took was the friken contecting rod shape to change to be able to do that? Link to comment Share on other sites More sharing options...
1-3-2-4 Posted July 3, 2015 Share Posted July 3, 2015 Formulas, according to FSM, are: NBS = (CBS+MCLE)-.20mm for intake side NBS = (CBS+MCLE)-.35mm for exhaust side NBS stands for 'NEW BUCKET SIZE' CBS stands for 'CURRENT BUCKET SIZE' MCLE stands for 'MEASURED CLEARANCE' I modified the name of the variables NOTE: all above variables are assumed to be in mm, not inches. Ok got it I assume the number is located someplace on the bucket? Link to comment Share on other sites More sharing options...
heiche Posted July 3, 2015 Share Posted July 3, 2015 yup, it's printed under the top BtSsm - Android app/Bluetooth adapter. LV, logging, gauges and more. For 05-14 Legacy (GT, 2.5, 3.0, 3.6), 02-14 WRX, 04-14 STi, 04-14 FXT, 05-09 OBXT Link to comment Share on other sites More sharing options...
xt2005bonbon Posted July 3, 2015 Author Share Posted July 3, 2015 Ok got it I assume the number is located someplace on the bucket? You should measure their thickness though as they could be slightly thinner than when new. Link to comment Share on other sites More sharing options...
rmoore5 Posted July 3, 2015 Share Posted July 3, 2015 I work at SIA, in the body shop. I went over to the engine shop a few months ago when I was doing the 2009 OBXT. The new motors don't use buckets anymore. They have roller rockers but, the lash is set with small caps that cover the end of the valve stem. They are of various sizes like the bucket method. It was explained to me that the valve lash is calculated and set by an assembly machine. Then checked by a human readjusted if needed and then further down the line it is checked again by a machine (after the head is on the motor). They weren't running at the time. It would be hard to get over there while they are running as I am expected to be near my line diligently waiting for a break down:rolleyes: I've been dieing to find a picture of the bottom end and trying to picture this. All it took was the friken contecting rod shape to change to be able to do that? 1-3-2-4 Rather than litter this thread anymore I started a new one and posted some pdf links to FSM illustrations. http://legacygt.com/forums/showthread.php/2015-engine-bottom-end-242790.html Link to comment Share on other sites More sharing options...
xt2005bonbon Posted July 17, 2015 Author Share Posted July 17, 2015 Quick update. Got all the parts. Started to install the new buckets until I realized two of the buckets I ordered are NOT for our car . They have the right sizes, but smaller outer diameter (made for newer subies I think). Dang it!! That's what happens when you order parts late at night.. Link to comment Share on other sites More sharing options...
StkmltS Posted July 17, 2015 Share Posted July 17, 2015 Bummer dude My DiySB rebuild Got Misfires? Link to comment Share on other sites More sharing options...
outahere Posted July 24, 2015 Share Posted July 24, 2015 Federal-Mogul will soon begin manufacturing sodium filled exhaust valves with hollow stems. They claim the valve head will run 80-150 degC cooler, because of better heat transfer to the valve guide. http://www.greencarcongress.com/2015/07/20150723-fm.html Link to comment Share on other sites More sharing options...
JmP6889928 Posted July 25, 2015 Share Posted July 25, 2015 Sodium valves have been around for 40 years. We used them in drag cars back in the 70's and they are NOT for street cars. They corrode from the inside out and the heads pop off of them after a while. NOT a good idea. Link to comment Share on other sites More sharing options...
rmoore5 Posted July 25, 2015 Share Posted July 25, 2015 Has the heads popping of been a problem for the subaru sodium filled? The article also touts the use of as small as 5mm stems, 16% smaller that the EJ valves, making the new ones even weaker. Link to comment Share on other sites More sharing options...
outahere Posted July 25, 2015 Share Posted July 25, 2015 According to my copy of the Subaru 2005 Mechanism and Function Book, the turbo engine comes stock with hollow-stem, sodium filled exhaust valves. Not sure why F-M is making a big deal out of their new sodium filled valves. Seems like old tech, not new tech. Link to comment Share on other sites More sharing options...
rmoore5 Posted July 25, 2015 Share Posted July 25, 2015 The article sounded like the technology they were touting was the "small diameter deep drilling" allowing for smaller stem diameters with the sodium. Not sure if it's new tech or just new for Federal Mogul. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted July 25, 2015 Author Share Posted July 25, 2015 Not sure if it's new tech or just new for Federal Mogul. That may be the case. Just for reference: http://legacygt.com/forums/attachment.php?attachmentid=213374&d=1437832584 Link to comment Share on other sites More sharing options...
xt2005bonbon Posted August 5, 2015 Author Share Posted August 5, 2015 Update... Finally gathered all the needed buckets and stuff. Yeah, I am slow... Put the buckets and cams back. Tightened to spec. Next was to insert the cam oil seals. Two questions there: 1. Manual states to grease the 'lips' of the oil seals. I wasn't too sure where the 'lips' were. My thoughts were the inner part of the oil seal. Was I right? (see where you see the blue grease on the pic below). 2. I've been using my 32mm socket to push the oil seals in. But are there far enough in (see pic)? http://legacygt.com/forums/attachment.php?attachmentid=214057&d=1438783489 http://legacygt.com/forums/attachment.php?attachmentid=214058&d=1438783489 Link to comment Share on other sites More sharing options...
StkmltS Posted August 5, 2015 Share Posted August 5, 2015 That looks right to me. I didn't take any pics but if I remember correctly mine looked exactly like yours does in pic #2. My DiySB rebuild Got Misfires? Link to comment Share on other sites More sharing options...
heiche Posted August 5, 2015 Share Posted August 5, 2015 yup - same here, that looks good. Yes, grease goes on the inside lip. I sometimes put a very thin layer of ultra grey on the outside perimeter, and tap it in evenly with a socket just like you did. You don't want to go too far. And it needs to end up straight or it will leak. BtSsm - Android app/Bluetooth adapter. LV, logging, gauges and more. For 05-14 Legacy (GT, 2.5, 3.0, 3.6), 02-14 WRX, 04-14 STi, 04-14 FXT, 05-09 OBXT Link to comment Share on other sites More sharing options...
xt2005bonbon Posted August 5, 2015 Author Share Posted August 5, 2015 Thanks guys. Then I 'just' need to put back the timing belt and stuff and recheck clearance . So far, I checked cylinder 4 intake and exhaust clearance and they are spot on. I am not checking cylinder 2 yet, as its clearance get affected with timing belt load. Link to comment Share on other sites More sharing options...
outahere Posted August 6, 2015 Share Posted August 6, 2015 Interesting trivia about the engine in the Nissan GTR: “When GT-R production started in 2007, valve clearance adjustment was by machine, but now everything is by hand – measuring, tightening, measuring again. After manual checks and confirmation, only then do we deliver to our customers.” http://reports.nissan-global.com/EN/?p=10948 Link to comment Share on other sites More sharing options...
xt2005bonbon Posted August 6, 2015 Author Share Posted August 6, 2015 Watched the Youtube vids of the AMS version of the GTR. Man that thing is fast. [ame=http://www.youtube.com/watch?v=pcHumlKI5EE]AMS GT-R Takes Down THREE 2,000hp Lambo's!!! - YouTube[/ame] Back on topic. Made some progress last night: cam pulleys are installed. Timing belt is now ready to put back on. Once it's on, I'll check clearance again. Getting a bit anxious now.. Link to comment Share on other sites More sharing options...
boxkita Posted August 6, 2015 Share Posted August 6, 2015 Interesting trivia about the engine in the Nissan GTR: “When GT-R production started in 2007, valve clearance adjustment was by machine, but now everything is by hand – measuring, tightening, measuring again. After manual checks and confirmation, only then do we deliver to our customers.” http://reports.nissan-global.com/EN/?p=10948 Anybody see the "big hammer" in this pic - http://reports.nissan-global.com/EN/wp-content/uploads/2013/07/130619_Yokohama_Takumi-8090.jpg - or was that me being hopeful they put them together like the rest of us? Build my car Boxkita Track days Link to comment Share on other sites More sharing options...
xt2005bonbon Posted August 7, 2015 Author Share Posted August 7, 2015 One more update : everything is put back on! I am waiting another 6 hours for the rtv to cure on the valve cover before I start her up (24hrs curing..). Pretty anxious right now Oh also. I did check the valve clearance after the timing belt was put back on. Everything is in specs (slightly on the looser side as planned). Link to comment Share on other sites More sharing options...
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