REAL Push Rod Tube STC

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6339
Posts: 27
Joined: Tue May 01, 2018 7:00 am
Name: Steve Rose
Location: New Port Richey,FL FA40
Aircraft Type: '48 140
Occupation-Interests: Retired Navy Maintainer
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Re: REAL Push Rod Tube STC

Post by 6339 »

Michael; Sorry to be late responding, I just saw your post. I also have a late serial number 48 with the C-90 and I had your symptoms when I first got my plane. Sure enough the motor had been top ended and "improved" with drilled rocker arms. Going back to the late-model intake rockers cured my oil in the intake/carb box. So...I would say that Randy has the measure of it :)
Steve Rose
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6597
Posts: 374
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Name: David Sbur
Location: Vancouver WA KVUO
Aircraft Type: '46 140 0-200A
Occupation-Interests: Agriculture
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Re: REAL Push Rod Tube STC

Post by 6597 »

Well now that explains a few things on my bird......
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4945
Posts: 48
Joined: Tue May 01, 2018 7:00 am
Name: Gary
Location: Stockton, CA
Aircraft Type: C-120
Occupation-Interests: Retired Congressional Staff, Navy Reserve Retiree, Former P-3 Flight Engineer, Former aerospace technician
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Re: REAL Push Rod Tube STC

Post by 4945 »

I was about to send my rocker arms in to Aicraft Specialties and noticed I have the same issue. All the rocker arms are drilled. At around $500 each, it's too bad the hole can't just be plugged.

Gary
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6597
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Location: Vancouver WA KVUO
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Re: REAL Push Rod Tube STC

Post by 6597 »

Gary,

I contacted Todd at Smokin' Rivets and he got me some exchanged overhauled rockers cheap, make sure you check the pushrod lengths on valve lash for overhauled rockers.

Todd Littfin
www.srairparts.com
smokinrivetairparts@gmail.com
715-450-3689
Chippewa Valley Regional Airport (KEAU)
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phil123
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Location: WA
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Re: REAL Push Rod Tube STC

Post by phil123 »

I have drilled intake rockers and don't see a problem with oil pooling in the airbox? Might be a int. guide wear issue but that's just a guess.
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