Subject: PCV valve
Author: brad kopp
Date: Nov 23, 2000, 12:30 PM
Post ID: 1704109016
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taliaferro" <ctal-@quik.com> | Block addressTo:"Brad Kopp" <fotog-@yahoo.com>Subject:Re: PCV valveDate:Thu, 23 Nov 2000 06:40:47 -0600 [input] [input] [input] [input] [input] [input] [input] Add Addresses I got this from Charlie Tallifiero:
Hi, Brad. On a couple of my older guzzis I removed the awkward breather box entirely, which leaves 2 tubes protruding from the top of the crankcase. The smaller-diameter tube is the oil return - I put a short section of appropriately-sized fuel hose on the end, plugged with a screw and RTV silicon. This prevents oil from coming OUT of the hose, which it wants to do at high RPM; make sure the hose is clamped snugly onto the metal tube. The larger-diameter tube is the breather. If you can find a PCV valve which is a perfect fit into the tube, great. I could not find a perfect fit, so again, I cut a short length of hose to mate the tube to the PCV valve. Then on the out-bound side of the PCV valve, I ran another length of hose under the transmission to the frame attachment, blowing out the right side where the original hose was vented. I used a section of clear vinyl hose for this, so I could watch and see if significant amounts of oil were blowing into it. Even at high RPM I only get a mist of oil, so I'm comfortable now that this is a viable modification. Make sure the PCV valve is oriented so as to let positive pressure OUT while not letting pressure (or moisture or debris) INTO the crankcase. Most PCV valves are ball valves, so, if inserted vertically, the ball will be shut (sealed) while the engine is off. When the engine is on, the internal crankcase pressure will lift the ball to exhaust the excess pressure. If you're not sure of the orientation, you can play with the valve a little, blowing into it from either side to see which way is open and which way is shut. It should be pretty easy to determine. I've been running this setup for a few years on 3 bikes (all Eldos), with no ill effect. I'm still not certain why oil-blowing seems more prreviewent on the loop-frame models; I've got an 850T and T3 which are essentially the same engine but no oil-blowing. Who knows?
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<TD>taliaferro" <ctal-@quik.com><SMALL> | <B><A href="http://us.f13.mail.yahoo.com/ym/BlockSender?NBR=1&NE=cta-@quik.com&box=Inbox&MsgId=5701_2989813_3427_1058_9002_0&inc=&num=&Search=&YY=16390&order=down&sort=date&pos=0">Block address</A></B></SMALL></TD></TR>
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<TD align=right noWrap vAlign=top><B>To:</B></TD>
<TD>"Brad Kopp" <fotog-@yahoo.com></TD></TR>
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<TD align=right noWrap vAlign=top><B>Subject:</B></TD>
<TD>Re: PCV valve</TD></TR>
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<TD align=right noWrap vAlign=top><B>Date:</B></TD>
<TD>Thu, 23 Nov 2000 06:40:47 -0600</TD></TR></TBODY></TABLE>
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<TD align=right bgColor=#ffffff><FONT face=Arial size=-1><INPUT name=v type=hidden value=YM> <INPUT name=A type=hidden value=a> <INPUT name=fn type=hidden value=taliaferro,> <INPUT name=ln type=hidden value=,> <INPUT name=e type=hidden value=c-@quik.com,> <INPUT name=m type=hidden value=1> <INPUT name=.done type=hidden value=http://us.f13.mail.yahoo.com/ym/ShowLetter?MsgId=5701_2989813_3427_1058_9002_0&order=down&inc=&sort=date&box=Inbox&YY=16390> <A href="javascript:document.frmAddAddrs.submit()"><B>Add Addresses</B></A> </FONT></TD></TR></TBODY></TABLE></FORM><STRONG>I got this from Charlie Tallifiero:<BR><!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN"><XMETA content="text/html;charset=iso-8859-1" http-equiv="Content-Type"><XMETA content='"MSHTML 4.72.3616.1301"' name="GENERATOR"><XBODY bgColor="#ffffff"></STRONG>
<DIV><FONT color=#000000 size=2>Hi, Brad. On a couple of my older guzzis I removed the awkward breather box entirely, which leaves 2 tubes protruding from the top of the crankcase. The smaller-diameter tube is the oil return - I put a short section of appropriately-sized fuel hose on the end, plugged with a screw and RTV silicon. This prevents oil from coming OUT of the hose, which it wants to do at high RPM; make sure the hose is clamped snugly onto the metal tube.</FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT> </DIV>
<DIV><FONT size=2>The larger-diameter tube is the breather. If you can find a PCV valve which is a perfect fit into the tube, great. I could not find a perfect fit, so again, I cut a short length of hose to mate the tube to the PCV valve. Then on the out-bound side of the PCV valve, I ran another length of hose under the transmission to the frame attachment, blowing out the right side where the original hose was vented. I used a section of clear vinyl hose for this, so I could watch and see if significant amounts of oil were blowing into it. Even at high RPM I only get a mist of oil, so I'm comfortable now that this is a viable modification.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Make sure the PCV valve is oriented so as to let positive pressure OUT while not letting pressure (or moisture or debris) INTO the crankcase. Most PCV valves are ball valves, so, if inserted vertically, the ball will be shut (sealed) while the engine is off. When the engine is on, the internal crankcase pressure will lift the ball to exhaust the excess pressure. If you're not sure of the orientation, you can play with the valve a little, blowing into it from either side to see which way is open and which way is shut. It should be pretty easy to determine.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>I've been running this setup for a few years on 3 bikes (all Eldos), with no ill effect. I'm still not certain why oil-blowing seems more prreviewent on the loop-frame models; I've got an 850T and T3 which are essentially the same engine but no oil-blowing. Who knows? </FONT></DIV><p><br><hr size=1><b>Do You Yahoo!?</b><br>
<a href="http://shopping.yahoo.com/">Yahoo! Shopping</a> -
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