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View Full Version : Where do these o-rings go? (ATC90)



Frankencelery
05-10-2006, 07:22 PM
I'm back at my ATC90 rebuild project, and I'm assembling the engine. I had a shop do the head and bore the cylinder, and now I'm trying to figure out where things go. In the Vesrah complete gasket kit I got there was a little bag of o-rings, and I'm not sure where they all go.

Here's a pic: http://kottum.mystarband.net/images/orings.jpg

Ok, the big ones are easy, those are for the valve covers. The bottom left o-ring goes on one of the dowels between cylinder and head. The green one and the other two black ones I have no idea. Any thoughts? My Clymer manual says to make sure to put orings back where you originally removed them. That's useful. :confused:

Howdy
05-10-2006, 08:03 PM
The green one is actually a valve seal. I'm having a brain fart on the 2 small black ones though ( caused by lack of sleep ).
Howdy

Frankencelery
05-10-2006, 09:30 PM
I was thinking that maybe that's what the black ones were, and that the shop didn't use them....

MTS
05-10-2006, 09:55 PM
They dont go on the carb-studs bewteen the carb and the intake manifold do they??? im also havin a brain fart as to where they go..(even tho i have rebuilt Sevral 90's..)...

Frankencelery
05-10-2006, 11:43 PM
I don't think so. There's a spacer and a gasket for that.