X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.2 cv=ApKs561P c=1 sm=1 tr=0 a=VHgJ5dpGuzIPFiadR7w/Iw==:117 a=tJvibCFsorSNjpxMvkubbw==:17 a=xqWC_Br6kY4A:10 a=2JCJgTwv5E4A:10 a=qwIPO8wnmNWcbcqIOi4A:9 a=QEXdDO2ut3YA:10 a=yMhMjlubAAAA:8 a=SSmOFEACAAAA:8 a=FCS5fItzv_JRpP5rXzAA:9 a=Kj79ghpinADGfAYH:21 a=gKO2Hq4RSVkA:10 a=UiCQ7L4-1S4A:10 a=hTZeC7Yk6K0A:10 a=frz4AuCg-hUA:10 From: "Clouduster clouduster@austin.rr.com" Received: from [107.14.73.228] (HELO dnvrco-cmomta02.email.rr.com) by logan.com (CommuniGate Pro SMTP 6.2c4) with ESMTPS id 10164025 for flyrotary@lancaironline.net; Sat, 30 Sep 2017 11:35:03 -0400 Received-SPF: pass receiver=logan.com; client-ip=107.14.73.228; envelope-from=clouduster@austin.rr.com Received: from [IPv6:::ffff:192.168.100.22] ([70.113.118.46]) by cmsmtp with ESMTPA id yJmtdGl7QDL0GyJmwdhTZb; Sat, 30 Sep 2017 15:34:46 +0000 MIME-Version: 1.0 To: Rotary motors in aircraft Subject: RE: RX-8 Oil Pump Replacement Date: Sat, 30 Sep 2017 10:34:46 -0500 Importance: normal X-Priority: 3 In-Reply-To: References: Content-Type: multipart/alternative; boundary="_EF946DFA-2953-47C5-9695-743D68C76C4F_" X-CMAE-Envelope: MS4wfOAP9P3Co810W0/3eHKgfH8f4HWbEIcfLJGi7Oag2WBI71k/5Pu+L8UZxCDoRgr7Spyv4KeXe9GnXFtbboBKVzxBH36NaF53tw3H0Mx/OzFU0xVI5qLO vOn05GE8lcg4K2YCk2P5p5kzaMhbPOPgJ0gjPkK11uJoAcXHn1Ev4kuiE9w7kU3eXfqWWo+CQahcuHnZSkv22tVJMvpv0qZ02rs= Message-ID: --_EF946DFA-2953-47C5-9695-743D68C76C4F_ Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Has anyone experienced low oil pressure due to wear of the Renesis oil pump= ? My Renesis engine on my RV-7 has had decreased oil pressure for a while. I changed the oil pump and now my oil pressure is back to normal. I have 780 hours on the engine and about 2500 engine heat cycles =E2=80=93= most of my flights are very short. On takeoff with relatively cool oil = the pressure went to 80 PSI but as the oil heated up the pressure decreased= to as low as 65 psi on a hot day during climb out. I change the oil at 50 hours I always inspect the oil filter material and= had some very small shiny flakes in the pleats. The particles appear to b= e non-magnetic A month ago I decided to remove the engine and replace the oil pump. I found the aluminum oil pump housing had a slight amount of wear where the= steel pump gear seals against the housing. Replacing the oil pump has r= esulted in much better oil pressure. --_EF946DFA-2953-47C5-9695-743D68C76C4F_ Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="utf-8"

Has anyone experienced low oil pressure due to wear of the Renesis o= il pump?

&nb= sp;

My Rene= sis engine on my RV-7 has had decreased oil pressure for a while.

I changed the oil pump an= d now my oil pressure is back to normal.

I have 780 hours on the engine and about 2500 eng= ine heat cycles =E2=80=93 most of my flights are very short.=C2=A0=C2=A0=C2= =A0 On takeoff with relatively cool oil the pressure went to 80 PSI but as = the oil heated up the pressure decreased to as low as 65 psi on a hot day d= uring climb out.

I change the oil at 50 hours=C2=A0 I always inspect the oil filter materi= al and had some very small shiny flakes in the pleats.=C2=A0 The particles = appear to be non-magnetic

A month ago I decided to remove the engine and replace the oil pu= mp.

I found the = aluminum oil pump housing had a slight amount of wear where the steel=C2=A0= pump gear seals against the housing.=C2=A0=C2=A0 Replacing the oil pump ha= s resulted in much better oil pressure.

= --_EF946DFA-2953-47C5-9695-743D68C76C4F_--