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Which valve stem seals leak

Old 05-11-2017, 04:56 PM
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Default Which valve stem seals leak

I'm looking to replace the valve steam seals in my 2000 after noticing that it burns a bit of oil when revving it out, and I'm going turbo.
I looked on eBay, and found some Supertech valve stem seals (Supertech Viton Valve Stem Seals 1.6L 1.8L Mazda Miata / Ford Escort BP B6D MX5 | eBay), and considering the name, and the price I jumped right on them.
I was watching a video on youtube (
), and he mentioned ebay supertech valve steam seals. He says that his car burned a lot of oil after installing them, but it could be a lot of other things as well.

This has me concerned that I just dropped money on some junk.
Has anyone heard anything about these seals and whether or not they're any good?
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Old 05-11-2017, 05:01 PM
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Most people will recommend OEM. Valve stem seals on the bp engine are a common failure point when non-oem seals are used. I bought supertech spring for my head during my engine build and they came with supertech valve seals. I used them and I am about to replace them with less than 3k miles on the motor because they are leaking.
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Old 05-11-2017, 06:44 PM
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I'm installing some in my VVT head that's currently being built. We'll see what happens!!
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Old 05-11-2017, 07:18 PM
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I had 2 sets of supertech valve seals leak on me. Never again. OEM works perfect, and are cheap.
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Old 05-11-2017, 08:06 PM
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Supertech seals leaked like a sieve here too
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Old 05-11-2017, 08:12 PM
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Well damn, now I'm getting worried mine will leak I wonder how fast I can get OEM valve stem seals shipped to my house.
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Old 05-11-2017, 08:17 PM
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I think mine are leaking too. Installed 400 miles ago.
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Old 05-11-2017, 08:25 PM
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Would you guys happen to know the part # for the intake and exhaust valve stem seals? I did a bit of searching and I think KL01-10-155 is the intake valve seals and KL02-10-155 is the exhaust valve seals. The price is $8.15 for the intake seals and $6.68 for exhaust seals. I'm wondering if that's the price per seal or a set? I'll most likely have to call and ask unless someone here knows.
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Old 05-11-2017, 08:26 PM
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The price is for 8 seals total, I remember that.

The price is per seal

Last edited by aidandj; 05-14-2017 at 10:12 PM.
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Old 05-11-2017, 08:28 PM
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Originally Posted by patsmx5 View Post
The price is for 8 seals total, I remember that.
Thanks! ordering a set of each now. Hopefully the machine shop hasn't installed the supertech seals I provided.
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Old 05-11-2017, 08:30 PM
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So all of a sudden everyone reports leaking Supertech valve seals? Just finished my head and it's on the block. Supertech it shall stay.
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Old 05-11-2017, 08:33 PM
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Originally Posted by bahurd View Post
So all of a sudden everyone reports leaking Supertech valve seals? Just finished my head and it's on the block. Supertech it shall stay.
haha that's what it seems like, and it's making me nervous. I really don't want to take a chance and have to tear into a freshly built engine if they do happen to fail and leak.
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Old 05-11-2017, 09:03 PM
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Goddammit. Why don't you people speak up sooner?

My Stupertechs are leaking, was going to replace them with more Stupertechs this weekend. Fak.
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Old 05-11-2017, 09:04 PM
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Sigh. I have a head in my garage with Supertech valve seals in it, too.

Feels bad, man.
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Old 05-11-2017, 09:24 PM
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Originally Posted by EO2K View Post
Goddammit. Why don't you people speak up sooner?

My Stupertechs are leaking, was going to replace them with more Stupertechs this weekend. Fak.
I covered my discovery of this failure in my build thread, along with all the others I've had. Mine actually failed twice... Intake and exhaust valves alike, so it wasn't just heat related from turbo/antilag. I think they are junk, my second set was leaking after 2 weeks of daily driving and a trip to the drag strip.
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Old 05-12-2017, 09:08 AM
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Also covered this in my build thread. Not even sure why I installed them because I had read other threads of people saying use only OEM. Read more noobs
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Old 05-12-2017, 09:25 AM
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I thought supertech valve seals were known to leak. At least that has been what I have been reading for the last several years.
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Old 05-12-2017, 10:03 AM
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I'd like to hear from a couple of the forum vendors who supply them. The usual google search returns some talk of leaks but more of the "I run them no problem " stuff. A lot of instances with leaks also involve dual springs with the seal contacting the inner spring id.

There's also the installation of the intake on the exhaust and vis a vis that I doubt people are quick to admit to if they installed wrong.

So I'd like to see vendors comments.

Last edited by bahurd; 05-12-2017 at 02:56 PM.
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Old 05-12-2017, 11:24 AM
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Originally Posted by patsmx5 View Post
The price is for 8 seals total, I remember that.
I called my local Mazda dealership yesterday and also emailed priority Mazda parts store and they are both telling me that they ​are sold per seal not as the set. So it seems pricey considering I only paid like $20 for the Supertech seals. This would be about $120 for all 16 seals. May I ask where you bought your seals from and when?

I'd also like to hear what the vendors have to say about the Supertech valve seals. I mean if this was such a widespread problem, you would think that Supertech would look into fixing this with another revised version of the seal or something. I'm using these with both Supertech +1mm oversized​ intake and exhaust valves and the Supertech double springs. Not sure that would make a difference.
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Old 05-12-2017, 11:58 AM
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scared of the Supertechs's, i used some Fel Pro's i had. Ill come back later with reports, good or bad.
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