What happened to this valve seal? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 09-04-2010, 01:25 PM   #1
Junior Member
Thread Starter
 
Join Date: Jan 2007
Location: EXTREME Southern Illinois
Posts: 281
Total Cats: 0
Default What happened to this valve seal?

#2 has been burning oil for a while, bad enough to foul a plug if left idling too long. After shutdown the sparkplug was wet with oil on the intake side. It would smoke on a cold start, and you could smell oil burning after overrun to a stop. Sounded like a valve seal to me, so I pulled the intake seals on #2 to have a look, and this is what I found:



The one I removed is on the top, and the new one is at the bottom. At first I thought maybe I bent it removing it, but after taking a closer look, all of the valve seals on the motor seemed to be 'crimped' this way. It's a FM head, but I know the previous owner had a trick new ferrea valvetrain installed. The second one I took of looked the same except some of the rubber inside was torn too (again, not sure that I didn't somehow damage it during removal). Is this some method of keeping the seals on that I've never heard of (do they pop off on these motors?), did the guy that put it together mess up, or did something else cause this?
DammitBeavis is offline   Reply With Quote
Old 09-04-2010, 01:47 PM   #2
Senior Member
iTrader: (1)
 
Join Date: Oct 2008
Location: Trailer County
Posts: 530
Total Cats: -9
Default

I have never seen such thing, not on Kia, Capri, GT, Protege or Miata heads. They all are like the one on the bottom.
mazpr is offline   Reply With Quote
Old 09-04-2010, 05:01 PM   #3
Elite Member
iTrader: (39)
 
Zabac's Avatar
 
Join Date: Sep 2007
Location: High Point NC
Posts: 4,854
Total Cats: 8
Default

what did you use to remove the seals?
is the head still on the block or did you remove it?
Zabac is offline   Reply With Quote
Old 09-04-2010, 05:12 PM   #4
Junior Member
Thread Starter
 
Join Date: Jan 2007
Location: EXTREME Southern Illinois
Posts: 281
Total Cats: 0
Default

Head is still on the block. This was the next step after my thread asking about the keeper removal tool. I used a modified chip extractor as suggested in that other thread. They popped off pretty easy. No way I applied enough force to bend anything.
DammitBeavis is offline   Reply With Quote
Old 09-04-2010, 05:59 PM   #5
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,174
Total Cats: 2,575
Default

if you didn't bend em then someone before you did.

either way they're bent and messed up
18psi is offline   Reply With Quote
Old 09-05-2010, 12:21 PM   #6
Junior Member
Thread Starter
 
Join Date: Jan 2007
Location: EXTREME Southern Illinois
Posts: 281
Total Cats: 0
Default

For the benefit of those that do this in the future, the intake and exhaust seals are different! I'm working on a 1999, and the intake seals are KL01-10-155 (10-155 in the parts manual), the exhaust seals are KL02-10-155 (10-155B in the parts manual). The intake seals have a single ridge/ring on the top surface, the exhaust seals have a double ridge/ring. A deep 1/4" drive 10mm 6-point socket is the PERFECT tool to install the new seals. The socket holds it just tightly enough that you won't drop it, and puts the pressure needed to seat it on the outside edges.
DammitBeavis is offline   Reply With Quote
Old 09-05-2010, 06:00 PM   #7
Elite Member
iTrader: (1)
 
NA6C-Guy's Avatar
 
Join Date: Feb 2008
Location: Birmingham Alabama
Posts: 8,038
Total Cats: 43
Default

Quote:
Originally Posted by 18psi View Post
if you didn't bend em then someone before you did.

either way they're bent and messed up
This. They are thin and not hard to crush if you are using the wrong tool, or too much force.
NA6C-Guy is offline   Reply With Quote
Old 09-05-2010, 11:47 PM   #8
Junior Member
Thread Starter
 
Join Date: Jan 2007
Location: EXTREME Southern Illinois
Posts: 281
Total Cats: 0
Default

All swapped out now with nice un-bent seals. After looking at all of them that I took off, I'm almost positive that someone pulled off and tried to re-use the old ones. The BEST part is that after a test drive, there is no more smoke, and no more oily sparkplugs!
DammitBeavis is offline   Reply With Quote
Old 09-07-2010, 01:20 AM   #9
Junior Member
Thread Starter
 
Join Date: Jan 2007
Location: EXTREME Southern Illinois
Posts: 281
Total Cats: 0
Default

As a bonus, I noticed there is barely any oil coming out of the crankcase vent anymore. I thought I had lots of blowby but it must have been coming from the ports through the bad seals!
DammitBeavis is offline   Reply With Quote
Old 09-07-2010, 09:28 AM   #10
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,838
Total Cats: 1,787
Default

Mine looked like that last time I replaced them, just due to fatigue and removing them.
Braineack is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 57 07-19-2017 05:11 PM
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
Leaky Wilwoods mx592 Suspension, Brakes, Drivetrain 1 10-01-2015 01:45 AM
Got bad Crank Angle Sensor and Random Misfire codes, but runs fine. Greasyman General Miata Chat 2 09-28-2015 11:44 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 12:21 PM.