Radiator surge tank ,freightliner

[Pushdiesel]

I sure this topic has been beat to death , but I was having issues with tank leaking , could not buy a new one so I started with a new metal tank and cut it up and rebuilt it. I know there are some people here with more knowledge about these tanks so I was looking for some input on my project . Photo 1 is the tank I purchased and cut up photo 2 is the finished tank mounted back into the coach

[georgesafari]

nice looking tank and clean install. What is the tanks original application? I am curious if theres any issue with the cap not being at the highest part of the tank?

[Pushdiesel]

The water level is below cap and freightliner tells me the orginal plastic tank are pressured approx 3 psi with cap rating 13psi the open bung u c is for the site gauge , I plugged that off and drove the coach 125 miles it ran great no water issues no over heating , and I did not pusjh,out any coolant , as I had set a bottle in back to catch it . So I could c if it did. And this tan drops down inside the engine compartment . So technically the cap is way above . Orginal application was was freighliner , sterling casada chassis yes it took some time and effort , but hell i have plenty of time.

[Pushdiesel]

Well finished the project ,

[georgesafari]

Looks great, clean install

[vettenuts]

Curious if you have any photos taken during the modification process? What was modified on the tank?

[Pushdiesel]

I do , I need to reformat the photos so they will fit this site.or if u can ,, not sure if it is allowed ,, u can email me I can upload all the photos . I,m in az at this time, not in a positions to try and post . Thanks for asking. H.

[Chief6722]

Can you also please post the exact metal tank you bought on Amazon? I’ve found many plastic ones that are fairly similar to the OEM, but I don’t want plastic again if I can help it even if it cost double.

[Pushdiesel]

I,m soory if I gave the impression that the metal tank came from Amazon, it did not I purchased this from American radiator company they deal in diesel and large trucks , this is made for freightliner ut does not fit RV mounting plate as it is to long . Ut if u know some one who can weld and cut or yourself. This can be made to fit it takes some time and effort u will need to move all hose fittings and install bungs and use a different sensor , I also installed a site glass. So far I had no issues I,m in az now we drove from Burbank ca. 298 miles. So here is the orginal metal tank before I cut it up and put it back togather. As soon as I return to Burbank I will reformatt the photos and and upload to site. I will post the sensor and weld in bungs . I think this is what shou,d have been done in the first place . Velocity freightliner Los Angeles tells me there will be no more plastic tanks . And dorman if u can find one is junk.

[Pushdiesel]

Ok all the photos I have ,

[Pushdiesel]

Test fit

[Chief6722]

These pictures are really appreciated because it’s what I was considering with a local shop that builds pressurized fuel cells and has built some previous pressurized coolant tanks. I just have to finish getting the measurements for them. They actually said they could make it from stainless for just a little more if I wanted and also a sight glass.

Thanks for sharing the efforts and I’ll share whatever I come up with.

[Pushdiesel]

If your low water sensor is the two wire all brass ,, then bung is 1 9/16 18 , how ever I found when installed it grounded out on the metal tank and just was not going to work so more work and research led me to this company for a two wire plastic unit and I ordered weld in bungs that are now 14mm by 1.50 pitch thread , u will need to install as I have in the final photo , I also added a site glass just for me. And painted every thing inc all area as u can c in photos. I hope i have been of some help rebuilding and cutting up a 285.00 tank did not seem right but had to be done. I wanted a one and done project . No more plastic , my next project t is to build a metal tank for the trans fluid. I want that one gone as well.