Originally Posted by Lokiel
(Post 1271130)
The original BOV is "dinky" in comparison to the TurboSmart BOV:
https://www.miataturbo.net/attachmen...ine=1443670948 TurboSmart EFR6258 BOV vs OEM BOV<br/> Can't say I've noticed any whining from this BOV. ...though maybe the engine will take care of that for me? #badjoke #ohgodwhy #whatamIdoingwithmylife?
Originally Posted by rleete
(Post 1271284)
If that was the case, it'd smoke like Checch & Chong on startup.
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Originally Posted by EO2K
(Post 1271250)
Valve cover is unmodified, 323GTX PCV on the intake side, VTA catch can on the exhaust side. Dipstick stays in its home. I'm just as boggled as everyone else. If I had to take a wild ass guess, I'd say oil is making it past the valve stem seals while the engine is shut down and super hot. If this is the case, I should see oil on top of the valves when I pull the manifold, no? How is oil coming out between the manifold and head? That's supposed to be a gas-tight seal, how is oil coming out? Maybe it leaks a bit when cold or something, but... Got a leak-down tester? If so, I'd do a quickie test with it just to validate the head gasket... --Ian |
Originally Posted by codrus
(Post 1271287)
Ah, OK, when you said VTA breather I was thinking you just had a filter on the breather and it could be dripping from there. If it's a hose to a remote catch can then not so much.
How is oil coming out between the manifold and head? That's supposed to be a gas-tight seal, how is oil coming out? Maybe it leaks a bit when cold or something, but... Got a leak-down tester? If so, I'd do a quickie test with it just to validate the head gasket... --Ian
Originally Posted by EO2K
(Post 1271250)
Check the mixing manifold, its being dripped on from the top. There are similar drips below each exhaust port on the side of the block. No way you are pushing oil past the valve stem seals while under power unless I had an absolutely ridiculous amount of blow-by, literally enough to overpower the exhaust back pressure. If that were the case I'd think that would manifest itself in other ways.
Valve cover is unmodified, 323GTX PCV on the intake side, VTA catch can on the exhaust side. Dipstick stays in its home. I'm just as boggled as everyone else. If I had to take a wild ass guess, I'd say oil is making it past the valve stem seals while the engine is shut down and super hot. If this is the case, I should see oil on top of the valves when I pull the manifold, no? |
Originally Posted by codrus
(Post 1271287)
..
How is oil coming out between the manifold and head? That's supposed to be a gas-tight seal, how is oil coming out? Maybe it leaks a bit when cold or something, but... ... --Ian |
Or, more than likely, my manifold is warped.
Originally Posted by codrus
(Post 1271287)
Got a leak-down tester? If so, I'd do a quickie test with it just to validate the head gasket...
Originally Posted by patsmx5
(Post 1271315)
I think someone posted in this thread that the machine work on the head was questionable.....
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Originally Posted by EO2K
(Post 1271318)
Or, more than likely, my manifold is warped.
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Didn't you fill with T6?
Not sure how much smoke you're going to see with T6. My MSM's rings were horrible and leaked a lot of oil but I never saw smoke when driving. Only black soot/carbon & condensation coming out of the muffler, and I burned through 1 qt or so a week. |
Originally Posted by EO2K
(Post 1271318)
Or, more than likely, my manifold is warped.
I do not. Ungh. It's not completely outside the realm of possibility. |
Originally Posted by EO2K
(Post 1271318)
I do not. Ungh. I have one that you're welcome to borrow. I can bring it down Friday afternoon, or if you're going to be up around here in the south bay you can stop by and we can test it. --Ian |
Originally Posted by gesso
(Post 1271319)
You seemed to indicate that is was wet beneath all the ports. that would be a strange warpage for them all to be leaking?
Originally Posted by Girz0r
(Post 1271321)
Didn't you fill with T6?
Originally Posted by Girz0r
(Post 1271321)
Not sure how much smoke you're going to see with T6. My MSM's rings were horrible and leaked a lot of oil but I never saw smoke when driving. Only black soot/carbon & condensation coming out of the muffler, and I burned through 1 qt or so a week.
Originally Posted by patsmx5
(Post 1271338)
I hope it's something simple too. But I've never seen a warped exhaust manifold result in liquid oil leaking out between the head/manifold interface, but not exhaust gasses, on all the ports at the same time.
I'm glad 18psi noticed and pointed out the drips super early on, so at least I know this has been there for a while. |
Originally Posted by EO2K
(Post 1271350)
Agreed. It would be odd.
Currently filled with Amsoil Dominator 15w-50 Tip is carboned up on the inside but I'd suspect that at this point. 18psi said he added a little bit of oil while he had it for the last couple weeks or so, but before this during break-in (Amsoil SAE 30 Break-In Oil followed by Rotella T 15w40, note I did not say T6) it used nothing. I switched to synthetic about 350 miles sooner than I had intended, but it wasn't burning anything and it stopped making metal, and 350 miles should not have been enough to condemn the rings. It's also not currently low, so not 'using' a boatload of oil. Right, all I'm saying is that a warped flange would be why the oil is escaping at that point. As to how the oil is GETTING there in order to escape is the actual problem. I'm glad 18psi noticed and pointed out the drips super early on, so at least I know this has been there for a while. |
First thing that happens when I get home tonight is that I pull the plugs, this should tell me something about the rings. I have no missfires at 18psi (226 kPa) with the stock 99/00 coils so I'm guessing the plugs will be dry, and that tells me oil is getting into the exhaust after the cylinder. The only thing this could possibly be is the exhaust valve stem seals.
Does that sound reasonable? |
Originally Posted by EO2K
(Post 1271354)
First thing that happens when I get home tonight is that I pull the plugs, this should tell me something about the rings. I have no missfires at 18psi (226 kPa) with the stock 99/00 coils so I'm guessing the plugs will be dry, and that tells me oil is getting into the exhaust after the cylinder. The only thing this could possibly be is the exhaust valve stem seals.
Does that sound reasonable? Good idea on pulling the plugs. |
Originally Posted by codrus
(Post 1271347)
I have one that you're welcome to borrow. I can bring it down Friday afternoon, or if you're going to be up around here in the south bay you can stop by and we can test it.
Originally Posted by patsmx5
(Post 1271355)
Does it blow a cloud of blue smoke like there's no tomorrow?
Originally Posted by patsmx5
(Post 1271355)
Is it burning a quart every 200 miles?
Originally Posted by patsmx5
(Post 1271355)
Do you have a catalytic converter (these will burn the oil and make it not smoke)
Originally Posted by patsmx5
(Post 1271355)
If not, I doubt your exhaust valve stem seals are the problem.
Originally Posted by patsmx5
(Post 1271355)
Good idea on pulling the plugs.
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Originally Posted by EO2K
(Post 1271350)
Currently filled with Amsoil Dominator 15w-50
Tip is carboned up on the inside but I'd suspect that at this point. 18psi said he added a little bit of oil while he had it for the last couple weeks or so, but before this during break-in (Amsoil SAE 30 Break-In Oil followed by Rotella T 15w40, note I did not say T6) it used nothing. I switched to synthetic about 350 miles sooner than I had intended, but it wasn't burning anything and it stopped making metal, and 350 miles should not have been enough to condemn the rings. It's also not currently low, so not 'using' a boatload of oil. Were you already switched to synthetic when you put the manifold on & noticed oil in the exhaust ports?
Originally Posted by EO2K
(Post 1271354)
First thing that happens when I get home tonight is that I pull the plugs, this should tell me something about the rings. I have no missfires at 18psi (226 kPa) with the stock 99/00 coils so I'm guessing the plugs will be dry, and that tells me oil is getting into the exhaust after the cylinder. The only thing this could possibly be is the exhaust valve stem seals.
Does that sound reasonable? GL, Post what you find! (I'm taking notes... for my BEGi inevitable fail build) |
Originally Posted by EO2K
(Post 1271359)
Thanks Ian, I appreciate the offer, but I believe this is probably that point where I should break down and buy my own diagnostic equipment.
--Ian |
Originally Posted by Girz0r
(Post 1271367)
Gotcha, I was wondering if the synthetic would be noticeable if it smoked :dunno:
Originally Posted by Girz0r
(Post 1271367)
Were you already switched to synthetic when you put the manifold on & noticed oil in the exhaust ports?
Originally Posted by Girz0r
(Post 1271367)
Sounds reasonable. I'd start there too, if the plugs are wet then I'd pull the intake manifold along with the exhaust to check the tops of the valves. I doubt it's the rings. If oil is exhaust side only then valve seals :dunno:
We'll see! I enjoy a good mystery, but not this close to a trackday weekend.
Originally Posted by codrus
(Post 1271369)
Sure, although it's unlikely to arrive before Laguna.
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Originally Posted by EO2K
(Post 1271371)
I'm hoping to not have to pull the intake manifold, because thats a damn nightmare with the engine in the car. Hopefully I can see something with the top of the intake manifold off. I wish I had a snake camera, we'll see if I can do it with a dental mirror or something.
Amazon.com : GCA 5.5mm Diameter USB Waterproof 6 Led Endoscope Borescope Inspection Wire Camera (5m) : Camera & Photo
$20 and it works with a smartphone (need a $5 USB on-the-go adapter too). It's not amazingly-high quality, but for $20 it's worth it. As for compressors, yeah, that's going to make it harder. A leakdown tester doesn't need much air, you can get by with a little pancake compressor like is commonly used for nail guns. --Ian |
Work is crazy so I can't keep up the million pages of back and forth chatter, but:
1) I noticed the leaks within the first 2 seconds of popping the hood when you arrived, so it was there from the beginning, so boost didn't "create" it. So I don't think anything broke, per se. 2) I only added oil after a few days when it went from right on the "full" mark to about 2-3mm lower. It's not chugging oil, at least that I noticed. 3) I think it's valve seals. On startup this happens every once in a blue moon, and after a reallllly long pull, in decel 4) yes the head-to-manifold flange/gasket/surface is 100% leaking. Not sure if exhaust leaking form there too, but clearly it has to be if liquid is getting past it. AT least a little bit. 5) I did top off the coolant once, but it didn't seem to use any after that 1st top off. ANy other questions text me cause I'm super busy right now and won't be able to keep up with thread (I'll try tho) |
G
your more than welcome to use the compressor at my parents house.. just let me know and we can meet there... |
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