Rebuild breakin's, faster for new housings?
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King of the Loop
Joined: Apr 2004
Posts: 2,620
Likes: 1
From: brooklyn, New York
Rebuild breakin's, faster for new housings?
Hey guys ive been babying my rebuild since I got her, never passing 4k till recently. Im at 1000 miles now and im pushign it a bit higher to 5500 ish. Ill slowly graduate to redline by 2k miles like its traditionally suggested.
My question is really, was this all necessary? I talked to a couple rotary guys i recently met, who do their own rebuilds and such and they were telling me that since I got brand new housings along with everything else in the motor, the seals will settle sooner and I should have been able to push her long ago. IS this true, its just curiousity reasons at this point since im already doing my 1000mile oil change sunday (around 1200 by then). thanks for any replies.
My question is really, was this all necessary? I talked to a couple rotary guys i recently met, who do their own rebuilds and such and they were telling me that since I got brand new housings along with everything else in the motor, the seals will settle sooner and I should have been able to push her long ago. IS this true, its just curiousity reasons at this point since im already doing my 1000mile oil change sunday (around 1200 by then). thanks for any replies.
Shorten the World....
Joined: Mar 2005
Posts: 96
Likes: 0
From: Raleigh, NC
I think the slow breaking in is more of a precaution, which should not be overlooked... It will pay off in the end, and I for one don't want to cut any corners when it comes to something like that....
i am legendary
Joined: Sep 2003
Posts: 8,478
Likes: 1
From: Kirkland, WA
New bearings? Used bearings? That's where a big difference is made in break-in time required, at least in my mind.
I can say this, though. From the factory all engines were pre-broken in for a little bit, but Mazda still recommended a short break-in time to new customers when they were bought. Whether or not anyone followed this, though, is questionable. For example, my RX8 owners manual indicated a 600 mile break-in off the lot, and this is after the pre-break-in from the factory. Since your housings are brand new and nothing was broken in at the factory, you don't have that little luxury.
If the bearings were reused, 1000-1500 is usually good enough, you can tell easily by taking a compression test in the beginning as well as along the way (every 100-200 miles) and watch compression rise. Once the compression peaks, you're basically done.
I can say this, though. From the factory all engines were pre-broken in for a little bit, but Mazda still recommended a short break-in time to new customers when they were bought. Whether or not anyone followed this, though, is questionable. For example, my RX8 owners manual indicated a 600 mile break-in off the lot, and this is after the pre-break-in from the factory. Since your housings are brand new and nothing was broken in at the factory, you don't have that little luxury.
If the bearings were reused, 1000-1500 is usually good enough, you can tell easily by taking a compression test in the beginning as well as along the way (every 100-200 miles) and watch compression rise. Once the compression peaks, you're basically done.
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