Rotor housing cracks
#1
Airflow is my life
Thread Starter
Rotor housing cracks
I've done some looking and cant find an answer to this. I have 2 used rotor housings. They both have 2 small cracks in the same place. One on each side of the leading plug hole on the trochiod surface. They are located at 90* and 270* and approx 1/8" long. Now Ive read at Mazdatrix that this type of cracking at the trailing plug holes is bad juju, same thing for the leading?
#2
RX for fun
iTrader: (13)
its early in the morning so im kinda having a hard time with my pictorial memory. is it actually cracking or flaking. if its more than 1/8 flaking then, thats bad. also, you maybe able to re-use it if the cracking is between the leading and exhaust port. the reason behind is that the flaking will go out of the exhaust.
Are you building a new motor?
Are you building a new motor?
#4
Airflow is my life
Thread Starter
I'll try to get a pic up this week. No flaking, chrome is like new, just these damn cracks. They radiate from the spark plug hole (leading) going forward and aft, like 1/8" long. Never seen this before. I'm thinking of building a fresh engine to replace the worn out POS in my daily driver. Or at least have it as a ready spare as I only have that car to get back and forth to work.
#5
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,789
Received 2,569 Likes
on
1,828 Posts
the 97 mazda motor sports catalog says its ok if the cracks not too big, i forget their spec though. you need colder plugs
mike
mike
Thread
Thread Starter
Forum
Replies
Last Post
cdn
2nd Generation Specific (1986-1992)
14
09-10-15 06:23 AM
cdn
2nd Generation Non-Technical and pictures
0
08-11-15 08:59 PM