Who is running the new 2mm 2 piece OEM Mazda Apex Seals?
Dang.. I just read the whole thing..
I'm going to print it out and show it to my engine builder.. He's not much of a computer guy..
Luckily I still have new set of 3 piece seals.. i'll put that in my next engine.. if this 2 piece fails.
I'm going to print it out and show it to my engine builder.. He's not much of a computer guy..
Luckily I still have new set of 3 piece seals.. i'll put that in my next engine.. if this 2 piece fails.
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Joined: Nov 2002
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From: bay area
Originally Posted by sicminded
i too am using the new stock oem 2 pc mazda seals, just got my engine done at a reputable shop recently. i had asked about them and my mechanic said they are suppose to be stronger than the 3 pc obviously, but other than that he did not say anything about warping. though i didnt ask about it either.
this read has gotten me all worried, but what i'm getting from this thread is that the 2 pc mazda seals are warping due to heat. either from running some kind of port, or running more than 13.5 lbs of boost. my motor is stock (no porting) and will probably not be running more than 13.5lbs of boost any time soon. do i have to worry much? and if this rumor/fact is true about the seals warping, with stock ports what's the max boost i could run?
chris
this read has gotten me all worried, but what i'm getting from this thread is that the 2 pc mazda seals are warping due to heat. either from running some kind of port, or running more than 13.5 lbs of boost. my motor is stock (no porting) and will probably not be running more than 13.5lbs of boost any time soon. do i have to worry much? and if this rumor/fact is true about the seals warping, with stock ports what's the max boost i could run?
chris
thats some bs right there. Damn mazda, why do they always have to be screwing **** up. My engine has already been put together with 2mm mazda seals......I really really hope these don't give way or I'm gonna be very very pissed off! If they do give before my warrenty I will have them throw RA seals the next time. RA are climbing to the top of the best apex seal chart almost. If they improve upon them again then I will be very happy.
I just explained the situation to my builder and he's sure its the porting shape.. I don't remember if there was a pic of the port or not, but if there is, can someone email it to me so that I could show it to my builder: philipsohn2004@yahoo.com
without seeing it and as soon as I said reverse "D" port, he (my engine builder) immediately said, its most likely due to the port shape and usually cause heat to build up.
without seeing it and as soon as I said reverse "D" port, he (my engine builder) immediately said, its most likely due to the port shape and usually cause heat to build up.
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From: IN
Originally Posted by ReodDai
From what I've been reading the porting seems to be even more of a problem then the amount of boost. Added higher then stock boost with a certain port and the little seals go bye bye lol.
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From: IN
Originally Posted by ReodDai
Gotta remember that these seals are engineered for a stock engine. Doubt the mazda engineers even thought about engine porting while they created the seals.
Eats, Sleeps, Dreams Rotary
Joined: Apr 2001
Posts: 3,736
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From: Dallas, Texas
Originally Posted by SleepR1
2-mm OEM 2-piece seals are going in my motor? What are the RA seals? Are these the Aviation grade versions?
here is a thread about the problems they had...and fix
https://www.rx7club.com/forum/showth...otary+aviation
Originally Posted by ReodDai
Gotta remember that these seals are engineered for a stock engine. Doubt the mazda engineers even thought about engine porting while they created the seals.
Well, I'm not too concern.. More I think of it and talking with my builder, it seems more like the port issue than seal issue.. If mine goes bye bye.. I have another spare engine that I'm going to use my 3 piece. Luckily I have brand new 3 piece seals.
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From: IN
Originally Posted by herblenny
Didn't someone say 2 piece seals have the same composite as 3 piece seals??
Well, I'm not too concern.. More I think of it and talking with my builder, it seems more like the port issue than seal issue.
Well, I'm not too concern.. More I think of it and talking with my builder, it seems more like the port issue than seal issue.
SleepR1, Is that Zavier from RX7 Store??? Mine are enlarged but shape didn't change either.. I think we are going to be ok.. I'll know in Nov.. Its put together and I think it will be broken in tomorrow.. but not going in until NOV. this year..
anyone have pics of the ports that cause this problem??
anyone have pics of the ports that cause this problem??
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Joined: Sep 2001
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From: IN
Originally Posted by herblenny
SleepR1, Is that Zavier from RX7 Store??? Mine are enlarged but shape didn't change either.. I think we are going to be ok.. I'll know in Nov.. Its put together and I think it will be broken in tomorrow.. but not going in until NOV. this year..
anyone have pics of the ports that cause this problem??
anyone have pics of the ports that cause this problem??
The previous KDR motor failed from a chipped front rotor apex seal after 18000 miles/18months of use. KDR built the motor from a Malloy reman which used 3-pc seals.
KDR's port job was only slightly larger than stock. I'm having Zavier increase the port size on the new motor (new front rotor housing and rotor).
Last edited by SleepR1; Jul 28, 2004 at 09:52 AM.
Thread Starter
Joined: Mar 2001
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From: FL-->NJ/NYC again!
Originally Posted by rotor_dee
Running stock 2piece 2mm seals over 30psi and about 800rwhp. No problems I have yet to find a seal better then stock.
Thread Starter
Joined: Mar 2001
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From: FL-->NJ/NYC again!
Originally Posted by 93 R1
Big ones 
. These problems might be traced to the shape of the exhaust port---the now infamous "Upside Down D"......
Originally Posted by GoodfellaFD3S
Very funny, he he . These problems might be traced to the shape of the exhaust port---the now infamous "Upside Down D"......
. These problems might be traced to the shape of the exhaust port---the now infamous "Upside Down D"......Maybe or a very few seals from the first batch could be out of spec just like the RA seals were.
Has anyone with these failed Mazda seals measured them before installation to see if they were in spec?
Originally Posted by rotor_dee
Running stock 2piece 2mm seals over 30psi and about 800rwhp. No problems I have yet to find a seal better then stock.
Can someone please post a pic of the ports from this engine??
