JazzAvi8r Posted December 22, 2017 Author Share Posted December 22, 2017 Damnit man.... Link to comment Share on other sites More sharing options...
xt2005bonbon Posted December 22, 2017 Share Posted December 22, 2017 Perhaps xt2005bonbon would send you a copy of his valve lash computation spreadsheet Ah I don't have it handy. It's on a different computer. In any case yeah, you don't even have to pull the engine to check your valve clearance. Looking forward to hearing the results though. And as others said already, if it checks out good, then time to pull the engine unfortunately. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted December 22, 2017 Share Posted December 22, 2017 Damnit man.... in metrics please? Link to comment Share on other sites More sharing options...
xt2005bonbon Posted December 22, 2017 Share Posted December 22, 2017 so all exhaust valves too tight? yeah. looks like they are way too tight. Which means the valves cannot provide a good seal. So if that is your culprit, then that is good news really. less work than changing a headgasket. Do it a la xt2005bonbon: change buckets with engine in place . Link to comment Share on other sites More sharing options...
JazzAvi8r Posted December 22, 2017 Author Share Posted December 22, 2017 edit: For reference, the last cold, dry, compression test was 50psi on Cyl2 and 25psi on Cyl4. I honestly expected Cyl4 to have near zero clearance on both exhaust valves. its interesting how the cyl2 has tighter valves, but higher compression.... Cyl2: I1=.004"/.102mm (out of spec) Cyl2: I2=.006"/.152mm Cyl2: E1=.0015"/.038mm (out of spec) Cyl2: E2=.005"/.127mm (out of spec) Cyl4: I1=.008"/.203mm Cyl4: I2=.007"/.178mm Cyl4: E1=.005"/.127mm (out of spec) Cyl4: E2=.007"/.178mm (out of spec) ME(H4DOTC)-2 states clearances should be between .0055" - .0095" for intake; .0118" - .0158" for exhaust Link to comment Share on other sites More sharing options...
xt2005bonbon Posted December 22, 2017 Share Posted December 22, 2017 yeah and in metrics, fsm says 0.20 +.04/-.06 mm for intake 0.35 +/-.05 mm for exhaust. So yeah, a lot of your clearances are pretty tight which would explain low compression especially with a warm engine I'd imagine (since exhaust valve stems are supposedly stretching a bit in length when hot, which in turn decreases clearance too). Link to comment Share on other sites More sharing options...
JazzAvi8r Posted December 22, 2017 Author Share Posted December 22, 2017 so time to math a little bit and figure out if i can swap a bucket. but worst case scenario, i replace five buckets on this side -- ~$100 easy enough. And yeah, no need to pull the head or yank the engine again. Link to comment Share on other sites More sharing options...
JazzAvi8r Posted December 22, 2017 Author Share Posted December 22, 2017 xt2005bonbon, that's an awesome writeup you got. Definately going to be doing some research through there. thanks for that! Link to comment Share on other sites More sharing options...
xt2005bonbon Posted December 22, 2017 Share Posted December 22, 2017 Let me see if I can find the spreadsheet. If I find it, I'll post it here. All in metrics though. Also, you can't do any math at this point until you can measure the buckets. You probably know that though. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted December 22, 2017 Share Posted December 22, 2017 OK. here it is. I just revised it just a bit to make it more user friendly. Did the editing on a chromebook and saved as .xlsx. So, not sure how it'd look in excel. Hopefully, it'll be fine. let me know. Note: in order to upload the file here, I had to change the file extension from .xlsx to .pdf. So before you open the file, make sure you change the extension back. Note 2: you will see that you can actually edit the target clearances. You will see that I selected slightly looser clearances. That's what I did for my cars. You don't have to do this.valve clearance calculator subaru outback xt.pdf Link to comment Share on other sites More sharing options...
Moderators BarManBean Posted December 22, 2017 Moderators Share Posted December 22, 2017 Yay, new buckets for you! "Bullet-proof" your OEM TMIC! <<Buy your kit here>> Not currently in stock Link to comment Share on other sites More sharing options...
xt2005bonbon Posted December 22, 2017 Share Posted December 22, 2017 OP, since you are planning to do the work with the engine in place, be careful not to rush. For instance, the exhaust buckets may fall off when you remove the exhaust camshaft. But if you take the cam off very slowly, they should stay in place. What I did though before I even removed that camshaft, I put some paint marks on the buckets just to be safe. Link to comment Share on other sites More sharing options...
JazzAvi8r Posted December 22, 2017 Author Share Posted December 22, 2017 Nah, I'm pulling the engine again and will do this work won the stand. It doesnt take but 3 hours to yank the engine, and frankly, its so much easier to put the intake manifold on and button up all the vacuum lines while the engine is out. Btw, earlier in the thread, soneone mentioned something about a possible vacuum leak. I found the culprit. The vac line going into the wastegate actuator is broken. Easy enough fix, just thought i would point that out. Finally, this car is on the back burner this weekend. I'm doing a EJ205 swap on a WRX wagon this weekend to make a little cash. As part of my payment, i get to keep the old engine that is making some really funny noises. Anyone know if there's any money to be had for this motor? Heads? Case halves? Link to comment Share on other sites More sharing options...
JazzAvi8r Posted December 22, 2017 Author Share Posted December 22, 2017 Oh, and as for measuring the buckets, I need to go buy a micrometer. The micrometer I have won't get close enough to measure those. I bought it when i was working on a 2stroke diesel Link to comment Share on other sites More sharing options...
aj_mariner Posted December 22, 2017 Share Posted December 22, 2017 Good to see that you’ve got it sorted! I’m still scratching my head at how it drove fine into the garage for new head gaskets only to get CEL and tight valve lash. Is this a common thing after head gasket replacement?? Link to comment Share on other sites More sharing options...
ehsnils Posted December 22, 2017 Share Posted December 22, 2017 Good to see that you’ve got it sorted! I’m still scratching my head at how it drove fine into the garage for new head gaskets only to get CEL and tight valve lash. Is this a common thing after head gasket replacement?? It shouldn't be related. But the valve problems may not have been seen due to the larger issue with the head gaskets. I would recommend to check the valve clearance on the other side as well to make sure that it's inside specs there. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted December 22, 2017 Share Posted December 22, 2017 Oh, and as for measuring the buckets, I need to go buy a micrometer. The micrometer I have won't get close enough to measure those. I bought it when i was working on a 2stroke diesel The bucket size should be printed inside the bucket (e.g. 489 which means 4.89 mm). After so many miles, it may be ever so slightly off from that thickness. But from my experience (one engine @ 73k and one engine @ 140k), the thickness barely changed if at all. But yeah, you should still get a micrometer. Link to comment Share on other sites More sharing options...
Moderators BarManBean Posted December 22, 2017 Moderators Share Posted December 22, 2017 IIRC, none of my used buckets were still at the "printed" spec on the bucket. I would absolutely measure them, especially since a decent tool is probably what, $30? Edit: they weren't TOO far off, but still. "Bullet-proof" your OEM TMIC! <<Buy your kit here>> Not currently in stock Link to comment Share on other sites More sharing options...
ehsnils Posted December 22, 2017 Share Posted December 22, 2017 Before buying any buckets, keep track of the existing buckets and see if it's enough to rearrange them and limit the number of buckets you need to buy. Link to comment Share on other sites More sharing options...
Moderators BarManBean Posted December 22, 2017 Moderators Share Posted December 22, 2017 Before buying any buckets, keep track of the existing buckets and see if it's enough to rearrange them and limit the number of buckets you need to buy. Also you might want to message boxkita to see if he wants to swap / provide any buckets at a discount. I think I sent him 20-30 buckets all measured and marked along with a bunch of other stuff from my part out. "Bullet-proof" your OEM TMIC! <<Buy your kit here>> Not currently in stock Link to comment Share on other sites More sharing options...
JazzAvi8r Posted December 22, 2017 Author Share Posted December 22, 2017 Thanks bean, ill do that. Maybe next weekend. Link to comment Share on other sites More sharing options...
JazzAvi8r Posted January 2, 2018 Author Share Posted January 2, 2018 well, after a two week hiatus on this car, I'm finally back at it. Did the engine swap on that WRX. took me all day because I had to Frankenstein his motor to get it to work: swapping out emissions pieces, changing manifolds, resoldering some wiring to replace broken connectors, deleting A/C, etc. wasn't too bad of a project. got the guy in and out in under 24 hours. then after cleaning up the garage, I pulled the engine on the OBXT again -- I must be getting really good at it. it only took an hour and 10 minutes this time around! Gonna double check the valve lash now that the engine is out. then I'll pull the belt, pull the cams, measure the buckets, do some math, order new buckets, put this mofo back together, and get her sold! Link to comment Share on other sites More sharing options...
xt2005bonbon Posted January 2, 2018 Share Posted January 2, 2018 Don't sell it! Keep it! Link to comment Share on other sites More sharing options...
JazzAvi8r Posted January 2, 2018 Author Share Posted January 2, 2018 I cant afford to keep it. I have too many cars already. If I don't sell it for at least $7500, i'd be losing money on it Link to comment Share on other sites More sharing options...
xt2005bonbon Posted January 2, 2018 Share Posted January 2, 2018 What else do you own? Link to comment Share on other sites More sharing options...
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