Mazda Rotary Club

Cars by Model Type => 3rd generation RX-7's => Topic started by: carl0s on May 06, 2009, 08:12:25 PM

Title: "cracked a tip" ?
Post by: carl0s on May 06, 2009, 08:12:25 PM
Could somebody please explain to me what a "cracked tip" means ?

I am assuming it means the corner of the rotor. Is this correct?

If that is the case, does replacing the side seals therefore fix this, or am I barking up the wrong tree? I understand that the housing might be gorged and what not, but I\'m just trying to understand this tip business.

cheers,
Carl
Title: "cracked a tip" ?
Post by: Brett on May 06, 2009, 08:46:41 PM
Tip seal usual means apex seal, so if you have a cracked one you will want to replace the apex seals as a bare minimum, probably a lot more once oyu have the engine open.

:wave
Title: "cracked a tip" ?
Post by: DRAGON on May 07, 2009, 08:32:06 AM
Loosely translated it means. \'Engine blown, but I dont want to say that cus its sounds expensive, so I will trick you with semantics\'
Title: "cracked a tip" ?
Post by: carl0s on May 07, 2009, 08:47:13 AM
Quote from: DRAGON;605773Loosely translated it means. \'Engine blown, but I dont want to say that cus its sounds expensive, so I will trick you with semantics\'

Fair enough ;)

I was thinking that the faces of the rotor were replaceable, but having watched the repair videos I see they\'re not, so it might be the case that a new rotor and even housing is required. Still, the job looks like an interesting and doable one that I could quite enjoy doing.
Title: "cracked a tip" ?
Post by: BlitzBoy on May 07, 2009, 10:03:35 AM
Have you opened up the engine yet? post pics and we can see what needs replacing
Title: "cracked a tip" ?
Post by: carl0s on May 07, 2009, 10:12:16 AM
Quote from: BlitzBoy;605794Have you opened up the engine yet? post pics and we can see what needs replacing

I haven\'t bought the car yet ;)
Thinking about going to have a look at the weekend.
Title: "cracked a tip" ?
Post by: BlitzBoy on May 07, 2009, 10:29:08 AM
ahh I see, then consider that the whole engine is fooked when haggling the price, apex seals,housing,plates,rotor. You may be lucky and only need to replace the apex seals, but normally when seals let go they take out the housing and damage the rotor in some way.
You cant tell what has actually broken in the engine until you rip it apart, so the current owner saying its just a cracked tip wont really know unless he has xray vision.

Parts to replace ALL of that would be in the region of 3K due to the poor exhange rate with Japan.
Title: "cracked a tip" ?
Post by: cowboy on May 07, 2009, 02:56:18 PM
if it my engine your on about it is just the seals gone.had the engine out and apart just dont have the money to run it fix it and the time to.
Title: "cracked a tip" ?
Post by: carl0s on May 07, 2009, 05:57:20 PM
Quote from: cowboy;605866if it my engine your on about it is just the seals gone.had the engine out and apart just dont have the money to run it fix it and the time to.

Hi Cowboy, yes it is your car. Thanks for the explanation.
Title: "cracked a tip" ?
Post by: carl0s on May 07, 2009, 08:01:03 PM
Quote from: cowboy;605866if it my engine your on about it is just the seals gone.had the engine out and apart just dont have the money to run it fix it and the time to.

I\'m definitely interested BTW, thinking of coming over at the weekend. I\'ll drop you an email or a txt.

cheers,
Carl
Title: "cracked a tip" ?
Post by: Silverstone Autosport on May 07, 2009, 08:21:14 PM
if we can help with a compression test just give us a call
good luck carl
Title: "cracked a tip" ?
Post by: carl0s on May 08, 2009, 03:29:44 PM
Quote from: Silverstone Autosport;605924if we can help with a compression test just give us a call
good luck carl

Thanks very much. You\'re reasonably local to me so I might be in touch.

cheers,
Carl
Title: "cracked a tip" ?
Post by: Silverstone Autosport on May 08, 2009, 03:32:47 PM
brilliant will look forward to your call
thanks
Title: "cracked a tip" ?
Post by: Jürg Hensdiek on May 08, 2009, 05:48:12 PM
Quoteif it my engine your on about it is just the seals gone.had the engine out and apart just dont have the money to run it fix it and the time to.
How are you gonna compression test an engine that is in bits?!
Title: "cracked a tip" ?
Post by: slingo on May 08, 2009, 06:24:35 PM
Quote from: Jürg Hensdiek;606175How are you gonna compression test an engine that is in bits?!

bolt on the gearbox and starter and hey presto :) unless the engine is in proper bits :Hammer