TC88 Oil Pump O-Ring Question - How many ?
#1
TC88 Oil Pump O-Ring Question - How many ?
Last weekend I removed the cam plate assembly for a cam chain tensioner replacement project on my 2001 Ultra.
There was a black O-ring placed on the oil pump spigot, please see pic. There was also a yellow O-ring (part # 11293) inserted in to the cam case where the oil pump spigot plugs in. So, there were two O-rings installed. However, the parts manual indicates just one-ring at this location (part # 11293), and the dealership parts person assures me that just one O-ring is correct.
Question – How many O-rings should be installed … one or two?
As always, thanks in advance for your assistance.
There was a black O-ring placed on the oil pump spigot, please see pic. There was also a yellow O-ring (part # 11293) inserted in to the cam case where the oil pump spigot plugs in. So, there were two O-rings installed. However, the parts manual indicates just one-ring at this location (part # 11293), and the dealership parts person assures me that just one O-ring is correct.
Question – How many O-rings should be installed … one or two?
As always, thanks in advance for your assistance.
#2
The OEM parts/service manuals are, of course, correct; the yellow o-ring is the correct o-ring and there is only one. However, adding an o-ring to improve the seal between the scavenge port and pump spigot is a little "hack" that has been practiced for years to mitigate against sumping. I use the o-ring that seals the oil pan drain plug, PN11105; it has to be stretched to fit over the pump spigot but is effective in achieving the intended purpose. Your call if you want to continue the hack but if you do, suggest you use the 11105 o-ring. If the second o-ring is too big, it could contribute to sumping.
The following users liked this post:
BezerkoBob (03-23-2018)
#4
#5
#6
Join Date: May 2015
Location: Then Wisconsin, now North Carolina
Posts: 3,172
Received 887 Likes
on
621 Posts
The following users liked this post:
run1fsr (03-23-2018)
#7
That's why I use the oil drain plug o-ring 11105. It is viton and much smaller in diameter and thinner than the broken one in the photo you posted. It has to be stretched over the pump spigot. I install the 11293 yellow o-ring in the scavenge port bore but slip the 11105 o-ring over the pump spigot. Makes a nice tight seal that will mitigate against sumping by tightening the seal of the 11293 o-ring; no downside to the practice.
The following users liked this post:
run1fsr (03-23-2018)
Trending Topics
#9
Join Date: May 2015
Location: Then Wisconsin, now North Carolina
Posts: 3,172
Received 887 Likes
on
621 Posts
That is correct. The yellow coating adds in preventing damage upon install. I have black and yellow still in the toolbox and still use both - just need to lube properly and install carefully. I said use the yellow one because I was referring to H-D kits.
The following users liked this post:
hrdtail78 (03-23-2018)
#10
Thread
Thread Starter
Forum
Replies
Last Post