I think i need a rebuild
#1
Senior Member
Thread Starter
iTrader: (3)
Join Date: Dec 2007
Location: Seven Valleys, PA
Posts: 638
Total Cats: 11
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
So i was seeing some oil smoke coming from the exhaust. I thought that it was coming from the turbo from that time that i accidental kinked the drain line. No such luck, here are the number from my compression test: 166,159,156,167
then i put a tbsp of oil in each cylinder and i got this: 186,177,175,190
I think the rings are just about shot.
So, how much have i screwed up this 78k mile engine?
Is this now a ticking time bomb?
How much longer will this thing last?
Should i just drive at super low boost (WG wired open)till i can afford a new bottom end?
Suggestions?
then i put a tbsp of oil in each cylinder and i got this: 186,177,175,190
I think the rings are just about shot.
So, how much have i screwed up this 78k mile engine?
Is this now a ticking time bomb?
How much longer will this thing last?
Should i just drive at super low boost (WG wired open)till i can afford a new bottom end?
Suggestions?
#3
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
So i was seeing some oil smoke coming from the exhaust. I thought that it was coming from the turbo from that time that i accidental kinked the drain line. No such luck, here are the number from my compression test: 166,159,156,167
then i put a tbsp of oil in each cylinder and i got this: 186,177,175,190
I think the rings are just about shot.
So, how much have i screwed up this 78k mile engine?
Is this now a ticking time bomb?
How much longer will this thing last?
Should i just drive at super low boost (WG wired open)till i can afford a new bottom end?
Suggestions?
then i put a tbsp of oil in each cylinder and i got this: 186,177,175,190
I think the rings are just about shot.
So, how much have i screwed up this 78k mile engine?
Is this now a ticking time bomb?
How much longer will this thing last?
Should i just drive at super low boost (WG wired open)till i can afford a new bottom end?
Suggestions?
Those aren't terribly "out of spec" numbers and they are fairly consistent. I know new is ~190psi but I recall acceptable being as low as 140psi (correct me if I'm wrong). Is there much oil burned? It's only going to get worse and you'll rapidly accelerate the problem with the application of boost.
#4
Senior Member
Thread Starter
iTrader: (3)
Join Date: Dec 2007
Location: Seven Valleys, PA
Posts: 638
Total Cats: 11
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
it is roughly 1/4 to 1/2 qt every thousand miles. I noticed it today quite a bit when decelerating off of the interstate. The smoke might be a combination of rings and turbo. How would you suggest i go about checking to see if the turbo is the issue?
#13
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
The engine definitely has wear but is acceptable. I'm my experience valve guides only show their leakage after sitting for a while (overnight) not constantly, you never know though.
If you have a complete begi kit installed it should have any required restrictor included. This is not to say the turbo isn't leaking oil.
I'm on the stock pcv system and have had 0 oil burn in 3000km, I'm planning to make a catch can but haven't gotten around to it.
If you have the means and a spare car or engine I'd look into a rebuild but that's me not wanting to possibly destroy a rebuildable engine. People do drive Chrysler's and Honda's with them smoking, I just don't know for how long.
If you have a complete begi kit installed it should have any required restrictor included. This is not to say the turbo isn't leaking oil.
I'm on the stock pcv system and have had 0 oil burn in 3000km, I'm planning to make a catch can but haven't gotten around to it.
If you have the means and a spare car or engine I'd look into a rebuild but that's me not wanting to possibly destroy a rebuildable engine. People do drive Chrysler's and Honda's with them smoking, I just don't know for how long.
#14
Senior Member
Thread Starter
iTrader: (3)
Join Date: Dec 2007
Location: Seven Valleys, PA
Posts: 638
Total Cats: 11
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
this test was with the motor just below operating temp and with the throttle open. And i did each cylinder twice before recording the number.
And no, i do not have a spare car or motor. this is also my only vehicle. Yes, i know i am an idiot...
And no, i do not have a spare car or motor. this is also my only vehicle. Yes, i know i am an idiot...
#19
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Unless someone, who knows what their doing, can drive it and see the engine operate they are just giving an opinion. Even seeing it run it's an opinion (better than over the internet though), I don't think it's ever a good idea to beat on / drive an (shall we say) injured engine but it's your car.
Anyone you know that could take a look?