Excessive catchcan oil - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 12-07-2011, 06:37 PM   #1
Senior Member
Thread Starter
iTrader: (14)
 
Join Date: Oct 2006
Location: South East Florida
Posts: 690
Total Cats: 6
Default Excessive catchcan oil

Recently I have been making a 40 mile drive, mostly highway, around 80mph. This is the result. Overflowing my catchcan.

My guess is around 36 ounces based on the oil on the shelf and ground. Around 3 beer cans worth. Oil is only coming out of the driver's side.

Running a garett 2554r around 12psi.


Yesterday, thinking I was smart, I disconnected the passenger side and ran it to a can. This solved nothing. Changed the driver's side to run uphill over the intake made no change.

I still have the 323gtx valve on the passenger side.


Driving home in an hour and expect to be mopping more oil. Going to be making this drive often now because of a family issue. Any help is greatly appreciated. What am I doing wrong?

Thanks,
Shane
Attached Thumbnails
Excessive catchcan oil-img_00000004.jpg   Excessive catchcan oil-img_00000007.jpg   Excessive catchcan oil-img_00000008.jpg   Excessive catchcan oil-img_00000005.jpg  
94mx5red is offline   Reply With Quote
Old 12-07-2011, 08:30 PM   #2
Senior Member
Thread Starter
iTrader: (14)
 
Join Date: Oct 2006
Location: South East Florida
Posts: 690
Total Cats: 6
Default

Overflowed it on the way home.
94mx5red is offline   Reply With Quote
Old 12-07-2011, 08:48 PM   #3
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,371
Total Cats: 1,332
Default

1. Leakdown the motor, if you have anything worse than 20% leak at the rings you have a blowby issue

2. Assuming your motor is healthy, you should be able to hook the factory PCV hose up to the intake manifold, run a breather on the driver's side, and have no oil consumption/blowby issue.

In reality, I'm expecting you to fail test 1. If you have issues filling cans on the highway, you have motor issues. Road course cars are a little different but for street turbo cars, you should be able to run the factory PCV setup with no issue.
Savington is offline   Reply With Quote
Old 12-07-2011, 09:17 PM   #4
Senior Member
iTrader: (3)
 
Join Date: Nov 2009
Location: Royal Palm Beach, FL
Posts: 725
Total Cats: 5
Default

I have a similar issue but i dont have a catch can. I notice minor oil residue coming from the base of the oil cap(def not enough ti fil a soda can). I have a breather in driver side. Sav you know why this is happening?
Clos561 is offline   Reply With Quote
Old 12-08-2011, 12:17 AM   #5
Junior Member
 
Join Date: Jul 2008
Location: Bergen County NJ
Posts: 103
Total Cats: 0
Default

what is with that first IC pipe?!?! its almost a 180 degree turn in like a 3 inch area.
Slacker2223 is offline   Reply With Quote
Old 12-08-2011, 12:20 AM   #6
Junior Member
 
Join Date: Jul 2008
Location: Bergen County NJ
Posts: 103
Total Cats: 0
Default

also it looks like you are running a breather filter on your idle valve. those are known to leak under boost. route that back into your cold side IC piping.
Slacker2223 is offline   Reply With Quote
Old 12-08-2011, 08:22 AM   #7
Senior Member
Thread Starter
iTrader: (14)
 
Join Date: Oct 2006
Location: South East Florida
Posts: 690
Total Cats: 6
Default

Quote:
Originally Posted by Savington View Post
1. Leakdown the motor, if you have anything worse than 20% leak at the rings you have a blowby issue

2. Assuming your motor is healthy, you should be able to hook the factory PCV hose up to the intake manifold, run a breather on the driver's side, and have no oil consumption/blowby issue.

In reality, I'm expecting you to fail test 1. If you have issues filling cans on the highway, you have motor issues. Road course cars are a little different but for street turbo cars, you should be able to run the factory PCV setup with no issue.

Other than this, the engine feels fine. *sigh*

Is the blowby purely from boost? Do you think it would be worth it to disconnect the wastegate?

I will source a leakdown tester, and post up the results.
94mx5red is offline   Reply With Quote
Old 12-08-2011, 08:34 AM   #8
Senior Member
Thread Starter
iTrader: (14)
 
Join Date: Oct 2006
Location: South East Florida
Posts: 690
Total Cats: 6
Default

Quote:
Originally Posted by Clos561 View Post
I have a similar issue but i dont have a catch can. I notice minor oil residue coming from the base of the oil cap(def not enough ti fil a soda can). I have a breather in driver side. Sav you know why this is happening?
Carlos, are you frequently in the Northlake/Coconut area? Pretty sure I have seen you running around the acerage.



Quote:
Originally Posted by Slacker2223 View Post
what is with that first IC pipe?!?! its almost a 180 degree turn in like a 3 inch area.
Pretty sweet, right?

That originally went from the turbo inlet to the air filter. It just so happens to fit well here too. It is a Begi piece from the S kit.

Quote:
Originally Posted by Slacker2223 View Post
also it looks like you are running a breather filter on your idle valve. those are known to leak under boost. route that back into your cold side IC piping.
Oh yea... I remember reading about that a while ago, and promptly forgot to do anything about it.
94mx5red is offline   Reply With Quote
Old 12-08-2011, 11:54 AM   #9
Senior Member
iTrader: (3)
 
Join Date: Nov 2009
Location: Royal Palm Beach, FL
Posts: 725
Total Cats: 5
Default

Quote:
Originally Posted by 94mx5red View Post
Carlos, are you frequently in the Northlake/Coconut area? Pretty sure I have seen you running around the acerage.





Pretty sweet, right?

That originally went from the turbo inlet to the air filter. It just so happens to fit well here too. It is a Begi piece from the S kit.



Oh yea... I remember reading about that a while ago, and promptly forgot to do anything about it.
i have a few friends out there but i live in royal palm beach. la mancha to be exact. you?
Clos561 is offline   Reply With Quote
Old 12-08-2011, 01:06 PM   #10
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 8,782
Total Cats: 119
Default

Just plug them holes right up and no more problem
Faeflora is offline   Reply With Quote
Old 12-08-2011, 02:42 PM   #11
Junior Member
 
muoto's Avatar
 
Join Date: Jun 2008
Location: Finland
Posts: 382
Total Cats: 60
Default

Quote:
Originally Posted by Savington View Post
1. Leakdown the motor, if you have anything worse than 20% leak at the rings you have a blowby issue
I'm in similar situation. ~36 ounces /month

Can piston rings leak even though compression test show ok numbers? (195-195-190-190 PSI)
muoto is offline   Reply With Quote
Old 12-09-2011, 01:24 AM   #12
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,371
Total Cats: 1,332
Default

Yep, compression will show up fine because the oil helps the rings seal. Leakdown test betrays the engine's confidences every time, though.
Savington is offline   Reply With Quote
Old 12-09-2011, 08:44 AM   #13
Senior Member
Thread Starter
iTrader: (14)
 
Join Date: Oct 2006
Location: South East Florida
Posts: 690
Total Cats: 6
Default

I kept out of boost and speed down to 75mph, and it still puked oil.


Harbor Freight was the only place I could find a leakdown tester unless I wanted to order online. This is the exact one that I got. Feels cheap.




I tried it last night, and quit when the mosquitoes got bad. This was my first attempt ever, and I think I screwed up. I did not put the car in gear after finding TDC.

Here is the method I used:
- disconnect battery
- pull plugs and wires
- find TDC for #1
- test
- went to TDC from cylinders in order 1 - 3- 4 - 2
- did not put car in gear

First round:
1: 63
3: 29 ; 30
4: 59 ; 70 ; 65
2: 20 ; 21

Second round:
1: 22 ; 34 ; 53 ; 100
3: 27 ; 34 ; 37
4: 26 ; 22
2: 39 ; 33 ; 24

Third round:
1: 40 ; 100 ; 37 ; 37
eaten alive


I am guessing that these may be mostly useless since I did not lock the engine from spinning.

I will try again on Saturday.
Attached Thumbnails
Excessive catchcan oil-image_14852.jpg  
94mx5red is offline   Reply With Quote
Old 12-10-2011, 04:44 PM   #14
Senior Member
Thread Starter
iTrader: (14)
 
Join Date: Oct 2006
Location: South East Florida
Posts: 690
Total Cats: 6
Default

Well, I guess I have a blowby issue.

Did the leakdown on a cold engine, and remembered to put the transmission in gear. It is difficult to get consistant results with this tool, but these are the averages:

1: 24
2: 32
3: 32
4: 25

To add insult to injury, the small fitting you see in the picture of the tool, unscrewed from the hose and is sitting in the #1 plug hole. I can't get it out. I tried putting some thread locker on the hose and screwed it in. Will let it sit until tomorrow.
94mx5red is offline   Reply With Quote
Old 12-10-2011, 04:58 PM   #15
Senior Member
Thread Starter
iTrader: (14)
 
Join Date: Oct 2006
Location: South East Florida
Posts: 690
Total Cats: 6
Default

Quote:
Originally Posted by Clos561 View Post
i have a few friends out there but i live in royal palm beach. la mancha to be exact. you?
I am up in Stuart, but I am doing all the work at my family's house in the acerage.

Know anyone that wants to buy a miata with blown rings? I have a spare low milage 95 engine to go with it. turboz not included.
94mx5red is offline   Reply With Quote
Old 12-11-2011, 01:02 AM   #16
Senior Member
iTrader: (10)
 
Join Date: Oct 2005
Posts: 718
Total Cats: 5
Default

Cheap and easy fix. Just fix it and turn up the boost..
TURNS101 is offline   Reply With Quote
Old 12-11-2011, 01:13 AM   #17
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,371
Total Cats: 1,332
Default

With the leakdown tester hooked up, take the oil cap off and listen for air in the oil cap, through the intake, and out the tailpipe. At 30+% one/all of them will sound like a very, very leaky air compressor fitting.

Oil cap = rings
Exhaust = Exh. valves
Intake = Int. valves

If you hit the wrong TDC, the leakdown will be ~45%. If you get 45%, spin it over again and try again. Then go 1-3-4-2 from there.

Your numbers (assuming its rings) would probably produce blowby, yeah. It's time for a shortblock.
Savington is offline   Reply With Quote
Old 12-12-2011, 07:19 PM   #18
Junior Member
 
muoto's Avatar
 
Join Date: Jun 2008
Location: Finland
Posts: 382
Total Cats: 60
Default

Does somebody know where I can get cheap leakdown tester online?
muoto is offline   Reply With Quote
Old 12-12-2011, 08:17 PM   #19
Junior Member
iTrader: (10)
 
Join Date: May 2010
Location: Gainesville, GA
Posts: 106
Total Cats: -3
Default

The one he posted from Harbor Freight is about as cheap as you're gonna get. I haven't found any tool places that beat their prices though just about all of them beat their quality. I usually buy their stuff anyway because I don't make a living with my tools.
fastnfurious7 is offline   Reply With Quote
Old 12-13-2011, 12:55 PM   #20
Senior Member
iTrader: (3)
 
Join Date: Nov 2009
Location: Royal Palm Beach, FL
Posts: 725
Total Cats: 5
Default

Quote:
Originally Posted by 94mx5red View Post
I am up in Stuart, but I am doing all the work at my family's house in the acerage.

Know anyone that wants to buy a miata with blown rings? I have a spare low milage 95 engine to go with it. turboz not included.
no lol. i should probably do a leakdown test on my car also :(
Clos561 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
My solution for Oiltemp and Oilpressure input into Megasuirt (MS3) Zaphod MEGAsquirt 41 01-24-2016 01:25 PM
Moroso Air Oil Separator Catch Can Aroundcorner Miata parts for sale/trade 2 10-01-2015 04:20 PM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 07:54 PM.