Radiator Cap same as Coolant Expansion Tank Cap?

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

sunrisew

New Member
Joined
May 31, 2016
Messages
11
Reaction score
2
Location
Los Angeles
I noticed today I needed to top off my coolant in the expansion tank. I replaced the radiator last year (the previous owner had the wrong kind of coolant in it, and it all got trashed). I don't seem to have any leaks that are noticeable, but I did notice that the coolant expansion tank cap was barely tight at all when I removed it (engine a bit warm but not hot). So, I figured it would be an inexpensive and wise choice to replace the cap. However, the cap I have is not OEM, and I am having difficulty determining the part number--I have searched for just the cap, but I can only find choices for replacing the cap on the radiator (not the expansion tank) or replacing the entire expansion tank. Am I missing something here?

2005 3.7L
 

LibertyTC

Well-Known Member
Staff member
Moderator
Joined
Oct 24, 2008
Messages
9,081
Reaction score
1,747
Location
B.C. Canada
Ya that was before I used brasso and made it better than new.
In detailing section title was metal.polish, anyways part number is.
05278697AA.
I'll post a better pic later once I'm off the dumb phone.
Also we have seen bad tanks.
Pressure testing tank may also be required.
If the tank is dirty inside or greatly discolored, you may want to get a new OEM tank and cap together.
 

Latest posts

Members online

Top