Cylinder break-in tips needed

How to keep the Cessna 170 flying and airworthy.

Moderators: GAHorn, Karl Towle, Bruce Fenstermacher

c170b53
Posts: 2560
Joined: Mon Apr 22, 2002 8:01 pm

Re: Cylinder break-in tips needed

Post by c170b53 »

Good idea George, but I'm gonna have to wait until I retire, then I might don a blue vest, happy face badge, name badge( Hey You) and get paid to give bad advice at Wallyworld :D
Jim McIntosh..
1953 C170B S/N 25656
02 K1200RS
User avatar
Bruce Fenstermacher
Posts: 10423
Joined: Tue Apr 23, 2002 11:24 am

Re: Cylinder break-in tips needed

Post by Bruce Fenstermacher »

BL and I are now using SuperSuper123 oil in and on anything mechanical on George's recommendation, blessed by TC Downey since he hasn't commented negatively on it despite having 8 hours to do so. And to cap it off Jim Mc plans on spending his retirement fighting corrosion with it's recommendation. What more does one need to switch. :lol:

PS rumor has it it is a base stock in MMO. 8O
CAUTION - My forum posts may be worth what you paid for them!

Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
User avatar
blueldr
Posts: 4442
Joined: Thu May 02, 2002 3:16 am

Re: Cylinder break-in tips needed

Post by blueldr »

As A lllooonnnggg time pilot and airplane mechanic, my advice is to use the good old 123 brand oil, jab the beast in the butt, and hang on! When the oil temperature subsides, throttle back and land. Keep an accurate log.
BL
User avatar
Kyle Wolfe
Posts: 706
Joined: Mon Mar 17, 2003 12:30 am

Re: Cylinder break-in tips needed

Post by Kyle Wolfe »

Okay maybe a brain lapse on my part and I just need to be steered a bit.....

Been trying to read the performance charts for the Continentals found in the member section but can't wrap my head around those charts.

Am trying to determine RPM for 65% and 75% power at various altitudes.

First I calculate that 65% of 145 hp is about 95 hp. I don't have a MP gauge but using 24HG shows a RPM of 2200.
The 75% of 145 hp is about 110 hp which works out on the chart to about the 2450 RPM.

Then these need to be modified for altitude and that's where I'm getiitng lost.....

Any better chart or way to calculate?

Any rules of thumb?

Someone got a better explain action?
Kyle
54 B N1932C
57 BMW Isetta
Best original 170B - Dearborn, MI 2005
hilltop170
Posts: 3485
Joined: Sat May 06, 2006 6:05 pm

Re: Cylinder break-in tips needed

Post by hilltop170 »

blueldr wrote:As A lllooonnnggg time pilot and airplane mechanic, my advice is to use the good old 123 brand oil, jab the beast in the butt, and hang on! When the oil temperature subsides, throttle back and land. Keep an accurate log.
What would you include in the "accurate log"?
Richard Pulley
2014-2016 TIC170A Past President
1951 170A, N1715D, s/n 20158, O-300D
2023 Best Original 170A at Sault Ste. Marie
Owned from 1973 to 1984.
Bought again in 2006 after 22 years.
It's not for sale!
User avatar
GAHorn
Posts: 21295
Joined: Fri Apr 12, 2002 8:45 pm

Re: Cylinder break-in tips needed

Post by GAHorn »

I emailed you the info from the performance section of the OM which indicates that at 2500 ASL 77% power is 2600 RPM.

I recommend that with the C145/O300 you run it at full throttle for the first hour and up to 5 hours if necessary until the CHT indicates a drop and/or the oil consumption indicates break-in has been achieved. It's unlikely you'll need more than 5 hours, and don't be concerned about full throttle operation in this situation. (Remember, 2600 with the standard prop is about all that full throttle achieves, anyway.) :wink:
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons. ;)
ghostflyer
Posts: 1423
Joined: Mon Apr 21, 2008 3:06 am

Re: Cylinder break-in tips needed

Post by ghostflyer »

Yep!!! Every thing that Gary said . Fly it if you had stole it . I was taught that 46 years ago and have run in many engines that way and so far only one has let me down . I still blame Lycoming for that but that's another story .
Post Reply
Cessna® is a registered trademark of Textron Aviation, Inc. The International Cessna® 170 Association is an independent owners/operators association dedicated to C170 aircraft and early O-300-powered C172s. We are not affiliated with Cessna® or Textron Aviation, Inc. in any way.