Leftcoast_LGT Posted November 21, 2017 Share Posted November 21, 2017 I need some help/advice. I just had a compression and leak down test performed, and i didn’t get the best results... Compression test Cyl 1: 144psi Cyl 2: 146psi Cyl 3: 143psi Cyl 4: 130psi Leak down test Cyl 1: 12% Cyl 2: 8% Cyl 3: 13% Cyl 4: 29% I’m sure I’ll need to rebuild or a new short block soon but how bad is it really? How long do you think I have before my engine is toast? My car runs totally fine right now but it comsimes about a quart of oil every 500-600 miles. I’m not seeing any smoke come out of the oil filler tube but its pushing a good amount of air out. I have 102,000 miles on it and my mod list includes: Blouch 380xt GS ebcs GS top mount Up pipe Down pipe Invidia q300 catback Link to comment Share on other sites More sharing options...
relative4 Posted November 21, 2017 Share Posted November 21, 2017 How long you been on this setup? Sounds like your #4 exhaust valve is getting pretty burnt and your rings are no spring chickens. The sooner you do the engine, the better your turbo will fare. If you want to run it till they both die, that's an option too. If you save up 6 months or a year for a shortblock, odds are your turbo will be fine. Get a shortblock and rebuild the heads, back in biz. Your mod list didn't include fueling, is that stock? If so, might want to consider upgrades during the rebuild to support that turbo. Link to comment Share on other sites More sharing options...
Leftcoast_LGT Posted November 21, 2017 Author Share Posted November 21, 2017 How long you been on this setup? Sounds like your #4 exhaust valve is getting pretty burnt and your rings are no spring chickens. The sooner you do the engine, the better your turbo will fare. If you want to run it till they both die, that's an option too. If you save up 6 months or a year for a shortblock, odds are your turbo will be fine. Get a shortblock and rebuild the heads, back in biz. Your mod list didn't include fueling, is that stock? If so, might want to consider upgrades during the rebuild to support that turbo. I’ve been on this set up for almost 25,000 miles now. So I basically have ringland failure, right? That’s good to know, I didn’t know it would affect my turbo that much, my shop told me to run my car till it starts smoking then buy a new block. I was actually just about to upgrade my fueling system but decided to get a comp/leak test done first just for peace of mind. Cant quite say I have peace of mind right now, but I’m sure happy I went with the safer rather then sorry option! Link to comment Share on other sites More sharing options...
relative4 Posted November 21, 2017 Share Posted November 21, 2017 If the block suffers nothing worse than worn ringlands and burnt valves, the turbo will probably be fine. If you end up spinning a bearing, the turbo will likely not be fine. Nothing at this point to indicate you're likely to do that, so don't overstress. Link to comment Share on other sites More sharing options...
JazzAvi8r Posted November 21, 2017 Share Posted November 21, 2017 agreed. drive it conservatively and start saving. keep the oil topped off and you should be ok for a while as long as you don't boost spike. Link to comment Share on other sites More sharing options...
Wasted Potential Posted November 21, 2017 Share Posted November 21, 2017 As I have been looking into a rebuild as well, heuberger Subaru sells assembled short blocks for 1700 (?) For an ej257, and I believe 1800 or 1900 for the ej255. Have your heads rebuilt, slap it on and be done with it! I'll be in this predicament in the near future too... Link to comment Share on other sites More sharing options...
Leftcoast_LGT Posted November 22, 2017 Author Share Posted November 22, 2017 Thanks for all the feedback! The heuberger prices look great, but i think I’m going to go with an IAG stage 2 short block so I’ll have headroom to push more power Link to comment Share on other sites More sharing options...
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