By heating and then letting it cool slowly it softens the copper, its then able to conform to irregularities and generally resurfacing wouldn't be necessary.

 

You guys are full of good information......thanks! Fred & Wilma said to say thanks also!

 

I just found out where the 5th O ring goes. The oil filter cap unscrews from the shaft that the filter goes on. If you unscrew it you will see it. I was also told that if the shaft isn't loose. Leave it alone. Don't replace the O ring if the shaft isn't loose.

 

Woooooooo Hooooooooo, so the final answer is; It is for the cap/shaft where it screws together (but don't replace if it is not loose)...



Mucho-appreciatio!



GREAT FIND!

 

Yep, same kind I purchased from the dealership. I purchased a bag of 10 so we're good for awhile...replaced every time I do an oil change.

 

I wondered

 

#4 here if you care to change it
I never have for 11 years / 90,000 miles (probably about 18 oil changes)

 

 

Well I find the answers actually and often the photos to
I do then share the info I find elsewhere here on the forum

 

Thanks....after all these years I'll be able to sleep tonight!....I'll give the picture to my son...he now has Wilma.

 

I wonder how you get at that O-ring, I twisted and pulled on the unit and never got it to budge. I never overdid the force applied as I did not want to break it as some have done.

 

I never saw part nr 4 Is very necessary?

 

I don't think so.....millions of Crossfire oil changes have probably occurred before members ASCHRAGER & VALK (above) figured out where the 5th O ring would go .....if needed.....

 

Over 100,000 miles and a LOT of oil changes here.

Never once have I changed that o-ring.

 

I not remember part with o-ring nr 4. Is possible that in my car not exist or is lost?What function it performs?