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engine rebuild questions, (wear marks normal?)

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Old Mar 24, 2010 | 09:10 PM
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engine rebuild questions, (wear marks normal?)

Ok, I have my 87 TII engine torn down. But the friend that helped me said some of the wear marks on the e-shaft might not be normal ( it's been a while since he's rebuilt one) So some help on the pics to follow would be nice. If this engine's junk I'm thinking of going JDM TII engine and just running it, might be cheaper.. idk yet.

Alex
Attached Thumbnails engine rebuild questions, (wear marks normal?)-black-rings-sized.jpg  
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Old Mar 24, 2010 | 09:18 PM
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excuse the hands but i'm trying to show the wear on the housings . I've yet to measure them but I'm fearing it's not good.
Attached Thumbnails engine rebuild questions, (wear marks normal?)-housing1.jpg   engine rebuild questions, (wear marks normal?)-housing2.jpg   engine rebuild questions, (wear marks normal?)-housing3.jpg  
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Old Mar 24, 2010 | 11:10 PM
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From: regina
someone correct me if im wrong but to me that looks like some chrome has flaked off, which means if you wanted to use the housings they would have to be resurfaced
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Old Mar 24, 2010 | 11:43 PM
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So is that meaning new housings or sending the current housings to have chrome re bonded to it? Also, are the black lines on the E-shaft signs of overheating? Thanks guys!

Alex
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Old Mar 25, 2010 | 01:42 PM
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WTF is a Piston?..Anyone?
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From: regina
wee i cant say from experiance about getting housings redone i have herd bad things i would not reccomend it. i know how the process works but to me it just seems better to get new ones.

on the e-shaft all motors i ever took apart look like that...mind u all had 180k on them or more. to me thats normal but agian someone can correct me if im wrong
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Old Mar 25, 2010 | 01:51 PM
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From: https://www2.mazda.com/en/100th/
shaft looks fine to me, actually it looks quite nice.

housings look better than i expect, but if you want a really tight motor you should replace em and sell those, they will run, but new rotor housings, and flat side housings make a huge difference
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Old Mar 25, 2010 | 03:05 PM
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Originally Posted by j9fd3s
shaft looks fine to me, actually it looks quite nice.

housings look better than i expect, but if you want a really tight motor you should replace em and sell those, they will run, but new rotor housings, and flat side housings make a huge difference
+1

might I suggest - www.rebuildingrotaryengines.com

good luck
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Old Mar 25, 2010 | 08:28 PM
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The shaft looks okay, but you should measure the journals. It looks like someone really banged it around getting the motor apart at some point. You have to be careful getting the intermediate plate off the shaft during disassembly.

The housings aren't bad... that amount of chrome flaking isn't a killer. You can probably find some nicer used ones, but depending how long you expect the motor to run you could re-use them.

If you decide to junk the shaft, I have a spare lying around that's in perfect condition and I've already measured it out.
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