View Full Version : Oil pipe o-rings

02-24-2007, 02:55 PM
Anybody had a seemingly good o-ring leak in the oil pipes? My left side oil pipe is leaking at the top, so I torn the head off to replace, only to find the o-ring seems to be in excellent condition. :? Are the o-rings a special compound or can I use run of the mill o-rings? Does a head gasket come with all related o-rings etc? Do I need to replace the copper washers on the studs when I throw it back together?


02-24-2007, 06:21 PM
Are you talking about the oil cooler lines?

02-24-2007, 06:53 PM
Nope. The two steel oil pipes that go from the under side of the head to the crankcase on the front of the engine. They return the oil from the head to the crankcase/ oil sump.

The CyberPoet
02-24-2007, 09:14 PM
If I understand what you are asking for, it's item #13 in this fiche file:
RonAyers: 2000 Kat 600 oil pump & related fiche file (http://www.ronayers.com/fiche/300_0298/oil_pump/oil_pump.cfm?man=su&groupid=5020&parent=4850). Your local dealer will probably get about $3-$3.50 each for them.

(A) I've never seen that o-ring go bad, unless someone tore it while they had the head apart.
(B) Anything that is copper gets replaced each time reassembly happens (they are use-once crush washers).
(C) I have no clue whether the o-rings are special to deal with the high oil temps & engine temps that can happen, but I would venture to guess that they are probably metric anyway, meaning you may not be able to find a replacement readily at a local hardware store in the US. At the prices listed above, I'd simply order the stock ones & be done with it.

=-= The CyberPoet

02-24-2007, 11:30 PM
I know those pipes :smt011 . Yeah , you SHOULD replace the o-rings anytime you take those pipes out . AND , if you don't have them back in just so ,or pinch them , they WILL leak , and you CANNOT stop the leak with high-temp RTV :smt011 . :lol: But yeah , mine still looked good when I pulled the head , but I replaced them anyway so as not to have to tear the head off AGAIN just to replace a $1 part , which you can get at ANY auto store , BTW . Oh yeah , that reminds me , I need to get some more of those myself before putting my engine back together again :doh .