Quote:
Originally Posted by dieseldan44
an alternative - POR 15 makes an epoxy fuel tank liner product. obviously you have to pull, wash, line and re-install but it will kill your issues dead. its meant to seal pin-hole leaks as well where the metal has corroded through - i had pinhole leaks.
my application has lasted more than 10 years and my filters look brand new after 10k miles. other than draining the tank and taking a bit of a diesel shower, its really not the worst job to pull the tank. its easier than it sounds and seems.
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Be careful doing this, I don't know about the w123s but on the r107s and even some Porsches the swirl pot that is inside these is made of Bakelite. That epoxy reasin doesn't adhere correctly and will flake eventually.
OP, drop the tank and take it to a radiator shop for a boiling. They should also be able to coat the interior but I would check the inside for a swirl pot and maybe skip the coating. Personally, I think it's unneccessary as gas/diesel will prevent rusting .
These are now 30+ year old cars. I wouldn't be surprised to see 30 years of grit build up.The stuff you see isn't rust but probably detrius from the surrounding environment. In socal it's sand, back east it was a weird mud.
I could have sworn diesel tank herpes was curable with an application of marine biocide. Is that product still around?