Heat Exchanger Cleaning

[dottieshusband]

My weekend project. The seals I removed had a rectangular cross section. The ones I see as replacements have a circular cross section. Anybody got a part number for the double stack seals? I've got the dunking formula, how long should I let the HE soak?

 

[MikeP]

Soak until it quits "boiling." That will typically take less that 5 minutes if you mix the solution per the DD specs. Mine usually quit boiling in 2-3.

 

[rsmith]

Their should be a gland seal between the orings. Got mine at DDA surprise suprise they were cheaper than diesel pro

 

[dottieshusband]

On this one, it's a double stack, so 2 inlet tubes, each with a retainer, a seal, a retainer, and another seal. The seals have flat surfaces on both faces and both edges, but the ones I see online as replacements are round in profile. Our Covington DD dealer does not carry any 2 stroke parts, penalty of not living on the coast. So I've been using K & S diesel, or Diesel Parts Direct. I'm just not sure if the round profile seals are a replacement for the square.

 

[rsmith]

Look like this? Mine are round

 

[jim rosenthal]

Like to see the "after" photos on these....

 

[DCMY #92]

It's been a while since I acid cleaned my cores, but I recall the new seals were round in cross section and old ones appeared square having been pressed into that shape in service.

 

[rsmith]

Like to see the "after" photos on these....

I should have taken an after shot

 

[dottieshusband]

That's just like mine. The seals are circular of course, but if you cut it, they are square, not round. I'm calling K&S today and I suspect the new ones are round. I just finished dipping mine and whaooo...boiling is the right word. I didn't realize how based it was until it was clean!