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01-25-2007, 03:57 PM
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Join Date: Jun 2005
Location: Milwaukee, WI area
Posts: 2,967
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Chrome dome
I got an offer today to pursue a 360 with chrome cylinders. I had chrome cylinders in my Cherokee 140, but didn't really know the difference. What are the differences, and are they better? I've heard both ways. 
I'm not really ready for an engine yet, but I thought I check in to it. My SB fuselage kit arrived today, so I am a ways from hanging an engine...
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Chad Jensen
Astronics AES, Vertical Power
RV-7, 5 yr build, flew it 68 hours, sold it, miss it.
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01-26-2007, 05:20 AM
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Join Date: Mar 2006
Location: Sandpoint, Idaho
Posts: 487
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If the engine is a mid-time engine and is already broken-in, I would consider it. If it is a fresh overhaul or top overhaul, I would steer clear.
Chrome cylinders have a reputation for being very difficult to break-in. My engine needed some cylinder work when I bought it. I now have over 85 hours on it and still have high oil consumption. I even tore it back down, had the cylinders re-honed and new rings fit. Ran the engine hard (25/25) for over 20 hours and still have the high oil consumption. Noone can explain whats happening or how to fix it. Currently using a quart of oil every 3-4 hours.
I'm sure others have had better results but I will never have chrome cylinders again.
Karl
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RV-8 #80240 SOLD
1999 BMW R1100RS
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01-26-2007, 07:08 AM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,762
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Like Karl says, if the rings seat properly with the cylinders, they hold up great. However, many times they just don't seat properly and yield high oil consumption forever.
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Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
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01-26-2007, 08:32 AM
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Join Date: Jun 2005
Location: Milwaukee, WI area
Posts: 2,967
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That's what I needed to know. This is a fresh overhaul.
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Chad Jensen
Astronics AES, Vertical Power
RV-7, 5 yr build, flew it 68 hours, sold it, miss it.
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01-26-2007, 09:34 PM
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Join Date: Aug 2005
Location: Pasadena CA
Posts: 2,484
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Why would anyone do an overhaul in chrome? I don't understand that...
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Stephen Samuelian, CFII, A&P IA, CTO
RV4 wing in Jig @ KPOC
RV7 emp built
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