Time for a new engine?
This happened shortly right after the oil feed line from Flyin Miata sprouted a leak.
It's a FM voodoo2 kit http://www.youtube.com/watch?v=HLWgNKebNwo My guess is either a piston ring, or maybe a oil seal in the turbo? I ran a compression test, got about 135 on each cylinder. The motor doesnt knock or make any loud noises, but it acts like it is running on 3 cylinders (shakey). It doesnt really smoke until you put load on the motor. The intake tract is full of oil, I haven't taken the intercooler off yet, but I am sure it's got a shit ton of oil accumulated in it. Time for a new motor? Or could it be the turbo's oil seals? Think FM will feel any obligation to repair the turbo (If that's the problem) for sending me a faulty oil feed line? Is that just wishful thinking?:bang: |
It does sound like its on three pistons.
I cant really tell whats wrong with a car on video unless its so obvious. |
Just start with the basics. Wires, plugs, coil pack, etc.... In experience when i see white smoke i would think turbo seal.
|
I wouldn't count on FM replacing the turbo unless you can prove it (the line) was faulty. They could easily say it was an error on the installer and not the part itself.
|
subaru swap?
|
Originally Posted by nicacus
(Post 242512)
The intake tract is full of oil, I haven't taken the intercooler off yet, but I am sure it's got a shit ton of oil accumulated in it.
Time for a new motor? Or could it be the turbo's oil seals? Think FM will feel any obligation to repair the turbo (If that's the problem) for sending me a faulty oil feed line? Is that just wishful thinking?:bang: you're most likely blowing oil through the crankcase through the rings, sounds like something in there is seriously damaged. Was the compression check done with the throttle WOT? |
Originally Posted by nicacus
(Post 242512)
Think FM will feel any obligation to repair the turbo (If that's the problem) for sending me a faulty oil feed line? Is that just wishful thinking?:bang: How many miles since the install? |
Give us a call, we'll help you troubleshoot so we can figure what the problem is. Once we've got that figured out, we can figure out how to fix it.
|
7 Attachment(s)
The throttle was wide open when I did the tests. it hasnt been more than 1000 miles, I havent driven it since early november.
The line was leaking from the crimp. Here are some more pics. Attachment 213473 Attachment 213474 Attachment 213475 Attachment 213476 Attachment 213477 Attachment 213478 Attachment 213479 as you can see there is oil all over the place, when it's running you can see it bubbling out of the down pipe and actuator arm. Keith I will call you guys as soon as I am with my unlimited long distance phone.. |
the oil is most likely entering the intake from the crankcase breather....which means a few things, one is easy, the pcv is no sealing in boost, but alas, you motor sounds like ass, so i assume you have major blow-by from failed rings/ringlands.
|
I forgot to mention I disconnected the line from the valve cover to see if oil was blowing out.. not a drop, the oil on the dipstick is crystal clear, there aren't any metal flakes as far as I can tell..
Could that mean the oil is coming from the inside of the turbo? |
ive had that problem before my engine went out on me, when you drive the car at full throttle does the oil guage jump around very badly and not stay steady ? thats how i knew it was my rings.......
also take the intake off of your turbo and crank the car ( if you can ) and see if oil is comming out of the turbo, you may have blown the seals on both sides of the turbo..... done that aswell.... mine was cause from all the pressure from blow by going through the crank and into the oil feed line....... |
Originally Posted by 01TurboMiata
(Post 242717)
ive had that problem before my engine went out on me, when you drive the car at full throttle does the oil guage jump around very badly and not stay steady ? thats how i knew it was my rings.......
also take the intake off of your turbo and crank the car ( if you can ) and see if oil is comming out of the turbo, you may have blown the seals on both sides of the turbo..... done that aswell.... mine was cause from all the pressure from blow by going through the crank and into the oil feed line....... |
You think it could be this:
Turbo seals somehow went bad so a lot of oil went into the intake tract and maybe coated the spark plug so that it has a difficult or impossible time firing that one cylinder? Just shooting ridiculus idea's out of my ass. If that is the cause then the only thing that needs to be done is clean up the oil, rebuild that turbo, and change the spark plugs. Prolly wishful thinking...... |
Looking at the pictures, I agree. The oil is probably fouling your plugs, thus the terrible idle. Call that a symptom, not a cause. Looks like bad seals in the turbo.
An oil gauge will often work as a knock sensor, actually. If you're setting the pressure jump around, it means you are in the process of damaging your engine. |
One comment from Bill - there's supposed to be a 90 degree fitting on the top of the turbo for the oil feed. One was included with the kit. The way it's installed right now, there's a lot of stress on the line.
His estimate is either a bad PCV (that's a lot of oil for a PCV in my opinion, but it could happen) or you have hurt rings. Excessive oil in the cylinders will hide a ring problem. Is that a piece of a PCV valve in the bypass valve outlet? |
My guess would be the leaky oil supply line starved the turbo and pooched it's bearings/seals. How's the shaft play?
|
2 Attachment(s)
The PCV valve is brand new.
The way the oil line is run there is no stress on it whatsoever??? :confused: The turbine shaft doesnt have any play at all. The turbine will coast for a couple seconds if you spin it I found the cause of the poor idle: oily plugs... Attachment 213461 I have no idea how this happened, but I have a feeling it was the cause of the suby noise. :vash: Attachment 213462 Here's a video of it running now: http://www.youtube.com/watch?v=zmBeCkzgo6o It sounds perfectly normal now, it wasn't smoking at all after I changed the plugs, so i took it for s short drive down the street. It feels as powerful as it ever did. I got it to boost up to about 5 psi ( I didnt dare go higher) without any problems. So now the only problem is the mass amount of smoke. |
Originally Posted by Keith@FM
(Post 242757)
.
Is that a piece of a PCV valve in the bypass valve outlet? |
It may be running better now that you have all four spark plugs, but again there is only three ways you are getting oil in chamber like that....blow-by, failed pcv, failed turbo seals. I highly doubt the turbo, you say the pcv is fine, and the compression test suggest your rings cannot hold compression like they should (especially when saturated with oil).
|
Umm, for a spark plug to bend like that something has to hit it.
|
If the rings are bad wouldn't it make some sort of horrible noise??
would a leakdown test be a wise? |
Originally Posted by Arkmage
(Post 243068)
Umm, for a spark plug to bend like that something has to hit it.
It looks more like it got too hot and bent.. that wouldn't make sense either though, why would it bend up??? |
Originally Posted by nicacus
(Post 243096)
If the rings are bad wouldn't it make some sort of horrible noise??
would a leakdown test be a wise? I highly recommend a compression and leak down test to see what's going on... I suspect you may have cracked a ring land and a chunk of piston hit the spark plug. Something had to have hit it to bend it like that. |
Originally Posted by Arkmage
(Post 243107)
I highly recommend a compression and leak down test to see what's going on... I suspect you may have cracked a ring land and a chunk of piston hit the spark plug. Something had to have hit it to bend it like that.
This was my thinking as well.... |
Ok, I am going to do another compression test right now.
If there was someting in the motor bouncing around wouldnt I hear it? |
1 Attachment(s)
Here's another "fun" picture
Attachment 213460 |
|
Ok I ran the compression test:
this time the engine was warm and I had the throttle wide open 1 -156 2 -157 3 -160 4 -160 That isnt bad is it?? |
No, but you gotta run a leakdown test now. If your oil control rings are failing, you'll have the symptoms you've showed but the extra oil on the rings seals them up. Leakdown test will diagnose leaky rings.
|
I started to do a leakdown test but the tester I have is bad, but it does pressurize the cylinders.
I can here air coming out of the turbo, making bubbly sounds. Does that mean the oil seals are bad? I'll have a new leakdown tester later tomorrow, so i will know all the numbers then. |
Is it possible that you bent the plug while you were installing it? Like, too many beers and banged it on the valve cover because you missed the spark plug hole?
-Mike |
Originally Posted by nicacus
(Post 243820)
I started to do a leakdown test but the tester I have is bad, but it does pressurize the cylinders.
I can here air coming out of the turbo, making bubbly sounds. Does that mean the oil seals are bad? I'll have a new leakdown tester later tomorrow, so i will know all the numbers then. http://autos.yahoo.com/maintain/repa...ques057_1.html |
The beer theory is possible, but more likely due to insomnia than alchohol.
So it's the rings then, because air couldnt get to the turbo if the rings were in good shape? |
That would be valves not rings unless the air is leaking down the rings into the block and up your oil drain.
that would require bad rings and a bad turbo oil seal, unless i'm mistaken. Did you read that article I posted? |
Yes I did, it tells you pretty much everything the owners manual of the tester tells you and then some :bigtu:
The reason I figured it was the rings, is because you can hear the air coming out of the PCV valve and the breather as well |
http://www.boostedmiata.com/blown_engine/pistons.jpg
you just need some JB Weld...it will fix right up. |
Damn.
The question now is do i re-build it or just buy another one? |
Nick, I have an extra engine just sitting in my 91 parts car, pm me and we can talk about it. I would just call, but can't find your number.
|
rebuild would be better in the long run; build it how you want. Used is cheaper, faster, easier.
|
All times are GMT -4. The time now is 02:53 PM. |
© 2024 MH Sub I, LLC dba Internet Brands