highspeedlowdrag Posted April 3, 2015 Share Posted April 3, 2015 Hey all 08 LGT engine blew a few months back took it to the dealer they decided it needed just a new short block at no cost to me thankfully. Before this all i ran was synthetic when they put it in they used conventional without telling me. My question is since you arent supposed to switch under normal circumstances is it the same after a rebuild? Now it sounds like i have another knock been meaning to upload video of the sound will do soon. Link to comment Share on other sites More sharing options...
fahr_side Posted April 3, 2015 Share Posted April 3, 2015 You should not break a new motor in on synthetic oil as it can make it really hard to get the rings bedded properly. Run dino oil for 5,000km or so and then go back to synthetic once fully broken-in. Obligatory '[URL="http://legacygt.com/forums/showthread.php/2008-gh8-238668.html?t=238668"]build thread[/URL]' Increased capacity to 2.7 liters, still turbo, but no longer need spark plugs. Link to comment Share on other sites More sharing options...
highspeedlowdrag Posted April 3, 2015 Author Share Posted April 3, 2015 So even tho only ran synthethic its not affecting the parts that werent replaced? Link to comment Share on other sites More sharing options...
stevenva Posted April 3, 2015 Share Posted April 3, 2015 Going from full synthetic to conventional is OK as long as the car does not call for full synthetic from the factory. That old wives tale of "once you use synthetic you can never go back to conventional" is a myth. http://www.valvoline.com/faqs/motor-oil/types-weights-and-viscosity/ If a customer insists on the cheap conventional oil and it calls for 0W- whatever, (which are full or synthetic blend only), I advise them that I can't/won't perform the service. Why did your engine fail in the first place? RIP 96 Legacy 2.2 4EAT lost reverse @ 374,000 miles Link to comment Share on other sites More sharing options...
highspeedlowdrag Posted April 3, 2015 Author Share Posted April 3, 2015 They never told me why it failed even when i asked and it wasn't in the paperwork but when I called actual subaru not the dealer they told me specifically do not switch back to conventional. Im not trying to argue because i don't know but that's what they told me. Link to comment Share on other sites More sharing options...
highspeedlowdrag Posted April 3, 2015 Author Share Posted April 3, 2015 Link removed bad video Link to comment Share on other sites More sharing options...
highspeedlowdrag Posted April 3, 2015 Author Share Posted April 3, 2015 Im sorry they did say it was starved of oil but why it was is what they didnt answer. I had just done an oil change after checking to make sure i was using the exact amount of oil recommended and somehow it was dry. Link to comment Share on other sites More sharing options...
bluesuby Posted April 3, 2015 Share Posted April 3, 2015 You should not break a new motor in on synthetic oil as it can make it really hard to get the rings bedded properly. Run dino oil for 5,000km or so and then go back to synthetic once fully broken-in. Old wives' tale. I broke in 4 new cars on Mobil 1. 2 have over 100k and none burn/consume any oil. Link to comment Share on other sites More sharing options...
fahr_side Posted April 4, 2015 Share Posted April 4, 2015 Mobil1 is such shit it's no better than dino and in many cases worse! Obligatory '[URL="http://legacygt.com/forums/showthread.php/2008-gh8-238668.html?t=238668"]build thread[/URL]' Increased capacity to 2.7 liters, still turbo, but no longer need spark plugs. Link to comment Share on other sites More sharing options...
GTTuner Posted April 4, 2015 Share Posted April 4, 2015 5w30 Mobil 1 sucks. I would use 5w40 or 0w40 in the turbo motor. You can always switch from conventional to synthetic at any time, or vice versa. That is an old wise tale. Link to comment Share on other sites More sharing options...
AMileHighLGT Posted April 5, 2015 Share Posted April 5, 2015 Crappy engine sound from my LGT: http://youtu.be/hzIjKuEs21g will add one from under hood when im not at work Link doesn't work. You shouldn't break in a new motor on synthetic unless the builder (Subaru) specifies it. As for the oil starvation, how many miles are on the car? Did they do a leakdown test? What was the oil consumption like? Im sorry they did say it was starved of oil but why it was is what they didnt answer. I had just done an oil change after checking to make sure i was using the exact amount of oil recommended and somehow it was dry. Link to comment Share on other sites More sharing options...
highspeedlowdrag Posted April 5, 2015 Author Share Posted April 5, 2015 yea i gotta upload a new one but if it helps its like a woodpecker sound and does increase with throttle. it was about 88k when it blew i cant say if they did a leakdown test. I was like a quart low every like 10 days, I had read subarus burned through alot of oil so i thought nothing of it. Link to comment Share on other sites More sharing options...
AMileHighLGT Posted April 5, 2015 Share Posted April 5, 2015 yea i gotta upload a new one but if it helps its like a woodpecker sound and does increase with throttle. it was about 88k when it blew i cant say if they did a leakdown test. I was like a quart low every like 10 days, I had read subarus burned through alot of oil so i thought nothing of it. They do. But a quart every ten days is ridiculous. That much and I would think both the engine and the turbo would be causing it. Engines are notorious for burned valves. Also cracked piston ringlands on cylinders 2 & 4. Turbos make it about 80k before they need a rebuild/replace, some go longer, others not as far. Depends really on how the vehicle has been maintained and driven. Link to comment Share on other sites More sharing options...
SBT Posted April 5, 2015 Share Posted April 5, 2015 Moved to 4th Gen Subforum - Pro amore Dei et patriam et populum - Link to comment Share on other sites More sharing options...
travrach Posted April 5, 2015 Share Posted April 5, 2015 Moving between synthetic to conventional or the other way is not a issue. Read up on it from real oil comparison company's not forums like this. The dealer did was correct for a new rebuild. Link to comment Share on other sites More sharing options...
highspeedlowdrag Posted April 6, 2015 Author Share Posted April 6, 2015 Thanks for answering my questions. Got a new video up this is what it sounds like from under the hood. http://legacygt.com/forums/showthread.php/anyone-know-lovely-sound-isi-p5111697.html#post5111697 Link to comment Share on other sites More sharing options...
highspeedlowdrag Posted April 6, 2015 Author Share Posted April 6, 2015 They do. But a quart every ten days is ridiculous. That much and I would think both the engine and the turbo would be causing it. Engines are notorious for burned valves. Also cracked piston ringlands on cylinders 2 & 4. Turbos make it about 80k before they need a rebuild/replace, some go longer, others not as far. Depends really on how the vehicle has been maintained and driven. Luckily my turbo is alive at 100k I'm looking at rebuild or replacement want to go bigger but I keep seeing that the 5mt cant handle the horsepower. Link to comment Share on other sites More sharing options...
Max Capacity Posted April 6, 2015 Share Posted April 6, 2015 Read my click here link. I went to Amsoil 5W-40 European full SAPS at 3000 miles, after using Castrol GTX for the break in. That SB has over 51,000 now. Oh, the 5mt is fine for more HP, I had Moore Performance Blast Plates installed on mine, they make the tranny shift much nicer as well as making it stronger. 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...
highspeedlowdrag Posted April 9, 2015 Author Share Posted April 9, 2015 If anyone wants to check it out i got a new vid of whatever that sound is when my revs drop http://youtu.be/YhInYmH2LbM Link to comment Share on other sites More sharing options...
Max Capacity Posted April 9, 2015 Share Posted April 9, 2015 I can't hear any thing in that vid, but I did check out your other thread again, 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...
highspeedlowdrag Posted April 9, 2015 Author Share Posted April 9, 2015 Aaarggg need a real camera ive tried 3 different phones to pick up the sound Link to comment Share on other sites More sharing options...
Max Capacity Posted April 9, 2015 Share Posted April 9, 2015 If it's that faint...why are you worried. These engine make that light ticking sound, its the injectors firing. If you have any thing knocking harder...then you may have issues. I couple of us have posted our engines sounds on here. Mine may be in my click here link. 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...
highspeedlowdrag Posted April 9, 2015 Author Share Posted April 9, 2015 Just because it didnt make that sound before so it seems like something i should be concerned with. I understand that a car with 100k is going to have problems but i dont want to lose another engine. Dealer will hopefully tell me tomorrow. Link to comment Share on other sites More sharing options...
highspeedlowdrag Posted April 10, 2015 Author Share Posted April 10, 2015 If it helps my car started shaking kinda violently during idle today hadnt been driving just sitting there letting t run. Link to comment Share on other sites More sharing options...
Max Capacity Posted April 10, 2015 Share Posted April 10, 2015 http://i185.photobucket.com/albums/x40/92Si/th_VID00022_zps9c855b80.mp4 That's my engine from April 2013. 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...
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