mikeyd Posted June 24, 2015 Share Posted June 24, 2015 Hey. I've had an unfortunate incident recently. I think there may have been an oil feed blockage to the passenger side head and turbo. As a result my turbo is likely seized and I've got something that sounds like valve slap on that side. The turbo is a BNR 16G remanuf, about 55k on it now. I took the timing cover off to check the belt tension cam sprocket alignment and it appears that the passenger side intake cam sprocket (the one with the VVT/OCV) is off clockwise by 1 tooth or so. The engine does run, just with the clickity clank noises. QUESTION: Is it possible for a cam sprocket to jump a tooth with a tight belt and that corner bracket from some temporary oil issue when it is rolling fine right now? If I'm wrong and its not off by a tooth.. what else may have happened? Can I bump that sprocket back without taking the pulleys off just to get that center cover off? AHHH! Thanks. Add one-touch operation (and more) to your stock sunroof Link to comment Share on other sites More sharing options...
Max Capacity Posted June 24, 2015 Share Posted June 24, 2015 Once again I have to say PM Underdog, he might have a clue. 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...
OhNineGT Posted June 24, 2015 Share Posted June 24, 2015 Having the timing belt off by one tooth is about 11% off. That is enough to cause a bent valve. Link to comment Share on other sites More sharing options...
mikeyd Posted June 25, 2015 Author Share Posted June 25, 2015 I bumped it back a tooth, which looked better but the noise did not seem to change at all. Not sure what to make of that fact. Add one-touch operation (and more) to your stock sunroof Link to comment Share on other sites More sharing options...
Max Capacity Posted June 25, 2015 Share Posted June 25, 2015 These are interference engines. timing off = bent valve Compression test may be due. 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...
mikeyd Posted June 25, 2015 Author Share Posted June 25, 2015 Compression test might be something.. although it might not even be possible to squeeze a tester in there without pulling the damn engine out. Ugh, I don't know what happened here. Anybody want to buy my baby (the car)? Add one-touch operation (and more) to your stock sunroof Link to comment Share on other sites More sharing options...
Max Capacity Posted June 25, 2015 Share Posted June 25, 2015 People do compression test and leak down test on these cars a lot. 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...
compsurge Posted June 25, 2015 Share Posted June 25, 2015 I didn't have a problem doing a compression test on mine. Which kit are you using? Link to comment Share on other sites More sharing options...
mikeyd Posted June 25, 2015 Author Share Posted June 25, 2015 Oh I've got some harbor freight kit, I'm just referring to the close proximity of plug holes to wheel well. Add one-touch operation (and more) to your stock sunroof Link to comment Share on other sites More sharing options...
mikeyd Posted July 15, 2015 Author Share Posted July 15, 2015 Can the head be removed without pulling the block out? Also, I did put a new O2 sensor in a day or two before all of this happened. Add one-touch operation (and more) to your stock sunroof Link to comment Share on other sites More sharing options...
Max Capacity Posted July 15, 2015 Share Posted July 15, 2015 Yes the head can be removed without pulling the engine. The benefit of pulling the engine is, its much easier to work on the heads that way, as well as installing the head or heads back on the block. If your going to be removing the head, make sure you use new head bolts going back together. We also recommend ARP head studs, but the block will have to be removed to install them. I know there can be issues with torqueing the head back on the block in the car. If the head bolt strips out the threads the block has to come out anyways. IMO do it tight the first time. Remove the engine from the car. If you have a engine hoist and tools, think about what's the minimum you need to disconnect, its really not that hard. You can see pictures in my click here link of how I removed mine. 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...
MTBwrench Posted July 15, 2015 Share Posted July 15, 2015 Took me three hours to pull the engine the first time. It's really not that bad! MTBwrench's Stage 3 5EAT #racewagon 266awhp/255awtq @17.5psi, Tuned By Graham of Boosted Performance Everyone knows what I taste like. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted July 16, 2015 Share Posted July 16, 2015 for reference, the FSM says that you are OK if the belt skips up to three teeth. Last year, mine skipped 3.5. I was OK. Link to comment Share on other sites More sharing options...
mikeyd Posted July 16, 2015 Author Share Posted July 16, 2015 Really.. wow.. which page is that on? That would blow my current theory. Either way its got to come apart I suppose and the root cause might still be tough to determine. Thanks for the comments guys. I never did end up writing up my engine build 5 years ago and I didn't really take notes during the process like I should have. I'd really like to avoid removing the entire block if I can, I've got to decide soon. Add one-touch operation (and more) to your stock sunroof Link to comment Share on other sites More sharing options...
xt2005bonbon Posted July 16, 2015 Share Posted July 16, 2015 Here you go . That's on page ME(H4DOTC)-46 http://legacygt.com/forums/attachment.php?attachmentid=212834&d=1437053612 Link to comment Share on other sites More sharing options...
mikeyd Posted July 16, 2015 Author Share Posted July 16, 2015 Ahh yes thanks. I did see that the other day, I guess OhNineGT may have spooked me stating that 1 tooth would do it. Add one-touch operation (and more) to your stock sunroof Link to comment Share on other sites More sharing options...
xt2005bonbon Posted July 16, 2015 Share Posted July 16, 2015 Yeah. Mine skipped because whoever did the timing belt job, before I got the car, put the timing guides too close to the belt . Remember to correctly adjust these little suckers! Link to comment Share on other sites More sharing options...
Max Capacity Posted July 16, 2015 Share Posted July 16, 2015 FWIW don't waste time making sure the marks on the belt line up with the marks on the pulley. The belt doesn't care how it goes on. The belt is made so it rotates and hits a different cog every time it goes around. So it doesn't wear in the same spot. 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...
mikeyd Posted July 16, 2015 Author Share Posted July 16, 2015 That's interesting and pretty cool. I'm sure hose marks are worn off, I only checked the pulley and timing cover marks. BTW, was it ok to remove crank pully with bolt with impact air gun? I don't believe I used one last time but I don't have the special holder wrench either. Also.. anyone with a BNR turbo, how long has it lasted? Add one-touch operation (and more) to your stock sunroof Link to comment Share on other sites More sharing options...
xt2005bonbon Posted July 16, 2015 Share Posted July 16, 2015 Do you have a manual? If yes, put it in 5th, parking brake on, and loosen the bolt using a breaker bar. Have done it 5 times on three different subies. always worked. Link to comment Share on other sites More sharing options...
mikeyd Posted July 16, 2015 Author Share Posted July 16, 2015 Ah.. ok, I suppose that is what I did then. As long as its safe. This really stinks.. I was looking at the new STI Limited on Subaru's website yesterday. That'd be nice, but it'd be $40k to come close to whats in my driveway.. and with 55 less hrs power. :-( Add one-touch operation (and more) to your stock sunroof Link to comment Share on other sites More sharing options...
quick4dr Posted July 16, 2015 Share Posted July 16, 2015 That's interesting and pretty cool. I'm sure hose marks are worn off, I only checked the pulley and timing cover marks. BTW, was it ok to remove crank pully with bolt with impact air gun? I don't believe I used one last time but I don't have the special holder wrench either. Also.. anyone with a BNR turbo, how long has it lasted? my BNR 16g has over 30k on her just started using oil, shes getting swapped out for 1.5xtr Link to comment Share on other sites More sharing options...
mikeyd Posted July 16, 2015 Author Share Posted July 16, 2015 About 54k on mine and then this.. not sure of the root cause yet.. just sayin Add one-touch operation (and more) to your stock sunroof Link to comment Share on other sites More sharing options...
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