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-   -   Which valve stem seals leak (https://www.miataturbo.net/engine-performance-56/valve-stem-seals-leak-93186/)

ByteVenom 05-11-2017 03:56 PM

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?

Ryan_G 05-11-2017 04:01 PM

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.

konmo 05-11-2017 05:44 PM

I'm installing some in my VVT head that's currently being built. We'll see what happens!!

patsmx5 05-11-2017 06:18 PM

I had 2 sets of supertech valve seals leak on me. Never again. OEM works perfect, and are cheap.

dc2696 05-11-2017 07:06 PM

Supertech seals leaked like a sieve here too

konmo 05-11-2017 07:12 PM

Well damn, now I'm getting worried mine will leak :cry: I wonder how fast I can get OEM valve stem seals shipped to my house.

aidandj 05-11-2017 07:17 PM

I think mine are leaking too. Installed 400 miles ago.

konmo 05-11-2017 07:25 PM

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.

patsmx5 05-11-2017 07:26 PM

The price is for 8 seals total, I remember that.

The price is per seal

konmo 05-11-2017 07:28 PM


Originally Posted by patsmx5 (Post 1413477)
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.

bahurd 05-11-2017 07:30 PM

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.

konmo 05-11-2017 07:33 PM


Originally Posted by bahurd (Post 1413481)
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.

EO2K 05-11-2017 08:03 PM

Goddammit. Why don't you people speak up sooner?

My Stupertechs are leaking, was going to replace them with more Stupertechs this weekend. Fak.

concealer404 05-11-2017 08:04 PM

Sigh. I have a head in my garage with Supertech valve seals in it, too.

Feels bad, man.

patsmx5 05-11-2017 08:24 PM


Originally Posted by EO2K (Post 1413487)
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.

Ryan_G 05-12-2017 08:08 AM

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 :party:

shuiend 05-12-2017 08:25 AM

I thought supertech valve seals were known to leak. At least that has been what I have been reading for the last several years.

bahurd 05-12-2017 09:03 AM

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.

konmo 05-12-2017 10:24 AM


Originally Posted by patsmx5 (Post 1413477)
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.

ryansmoneypit 05-12-2017 10:58 AM

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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