Blew a Apex seal

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HeliDev

Well-Known Member
Joined
Jul 7, 2003
Messages
108
Relax it was in my car.
However I though I would share the experience.
When I got the RX-7 I new the motor was a little tired, the comp was down a little, but that was only to be expected with the number of Ks on the clock.
I must say that I have been hard on the engine, mainly out of curiosity as Im planning on putting one in an aircraft (looks like a gyro at the moment), and I wanted to see how they handled the hard work.
Ive been nothing but impressed with the engine so far, smooth, lots of power, and its been bullet proof in the reliablity.

I had been getting a bit fussy to start in the mornings, and combining that with the slightly reduced power, I knew the end was near.
Pulling away from the lights on the way into work, 1st gear, 6k RPM, bang, engine still running, doesnt sound very good, only got about half power.
I coaxed it along to the nearest side street, and parked it. Currently waiting to find out how much its going to cost.
The reason I thought that some might find this interesting is that like rotary nuts always say is that the dont stop, even with a big malfunction.
I must say that I have found this to be true. The engine even restarted, twice.
Ive had a couple of piston engines break in comparable ways, and neither time did they continue to run, or restart.
Cant wait to get a rota flying:D
 

HeliDev

Well-Known Member
Joined
Jul 7, 2003
Messages
108
Yes, it appeared he was very upset because I hadnt fed him enough fish.
Now he's off to the zoo.
I really blew that one :gig:
 

CriCriOz

Well-Known Member
Joined
Sep 3, 2005
Messages
67
Location
Sydney Australia
i have owned RX-7 for quite a few yrs now, and if you look after them, warem them up etc, they will go for a very long time, comparable to any piston engine, and with ablown apex seal, or similar, you will still get approx 50% out of the engine. i have driven my RX-7 with a blown apex seal for a week before pulling the engine out and getting anew one.. ( i needed to get to work) unfortunatly, a blown apex seal means an entire engine rebuild as the damage usually also includes the rotor housings and rotor side seals.
 

HeliDev

Well-Known Member
Joined
Jul 7, 2003
Messages
108
Depends on how much damage you do!!!!
After the strip it turned out that the apex seal had slit and then done a neat little 90deg turn, completely screwing the housing, and the rotor.
The other housing had the chrome worn down, so it too was stuffed.
So the rebuild was 1 rotor, 2 housings, and a large rebuild cost.
If I had the time I would have done it myself, but I ended up chucking another motor in it, and sold it.
Miss it now, getting the urge to get another though!!!
 

Captain_John

Well-Known Member
Joined
Feb 3, 2003
Messages
699
Location
KPYM
Thank God it was on the car!

Normally when you blow a seal at the aquarium, they won't let you come back! The seals will miss you, though!

:D CJ
 
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