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Unread 01-08-2012, 08:32 PM   #1
jeepero81
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1980 CJ7 
 
Join Date: Nov 2011
Location: Thomasville, Georgia
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Which breather cap to use?

I'm getting ready to complete my valve cover project and carter, or holley in my case, swap with a mc2100. I want to delete the air handler and put an aftermarket chrome breather cap in but I can't figure out which one to use.

The stock grommet dia. is 0.45" internal on my '80 CJ. Is it just trial and error until I find one that fits or does someone have a part number and/or brand they would like to suggest to help a forum brother out?

Thanks!


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Unread 01-08-2012, 09:44 PM   #2
Skerr
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Take the grommet with you to the parts store and test fit. Easiest method I know of to save aggravation.
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Unread 01-08-2012, 10:22 PM   #3
Mickey_Mouse
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I have the mc2100 and replaced the pcv valve(s) and connected into the carb.

I used this breather filter for the back of the valve cover from advance auto :

http://shop.advanceautoparts.com/web...7CGRP2019_____

it did not fit perfect and fell out a couple of times in the driveway b-c it wasnt seated all the way. I had to take a knife and trim some of the rubber from around it. I did not cut a excess amount off though, just enough to where it would fit super tight. I had to take a screwdriver and force it around into the valve cover. I have a aluminum valve cover and now the filter doesnt move at all.


they also come in the pcv style : http://shop.advanceautoparts.com/web...CGRP2019_____3

cannot remember exactly where I got the PCV valves either Napa or Advance Auto. I purchased two or three of them that looked similar to this :

http://www.napaonline.com/Catalog/Ca...235_0262373487

and one like this : http://www.napaonline.com/Catalog/Ca...228_0306245574
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Unread 01-09-2012, 10:05 AM   #4
jeepero81
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Thanks for the heads up guys, I'll check out the stores this week!
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Unread 01-09-2012, 11:04 AM   #5
Ken4444
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I used Mr. Gasket # 2057. It fit well into the grommet in my valve cover. You can see it in the lower corner of the second photo.



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Unread 01-09-2012, 12:34 PM   #6
Mickey_Mouse
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Quote:
Originally Posted by Ken4444 View Post
I used Mr. Gasket # 2057. It fit well into the grommet in my valve cover. You can see it in the lower corner of the second photo.





where did you get the air filter?
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Unread 01-09-2012, 12:42 PM   #7
Ken4444
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Quote:
Originally Posted by Mickey_Mouse View Post
where did you get the air filter?
Summit Racing. Comes in different colors.
Air Filter Assembly, 8 1/2 in. Diameter, Round, Steel, Chrome, Moroso Logo, 2 3/8 in. Filter Height, Each
http://www.summitracing.com/parts/MOR-66310/

The benefit is that it's larger than the tiny 6" ones you see on Jeeps where a standard 9" filter didn't clear the brake booster.

Be aware that you can't get a standard off-the-shelf filter element for it though; you have to pay $15 for one from Moroso as far as I know.
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