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Originally Posted by okyoureabeast
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?
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Good to know. I'm thinking to take it out and have it checked out and go from there. A bit silly to buy a tank in advance. I was mistaken on the $300 unit. Wrong car. Looks like $500 is more like it.
OTOH, having a new in tank strainer on hand seems like a prudent move.
I haven't used biocide. The detritus looks like rust residue and has hard grittiness. If it is sand, there's a lot of it and removing and cleaning the tank as a minimum seems in order.
This car sat for 2 years. The story they told me at the indie garage/used car lot was that the woman inheritied it from her OP parents who were going into a nursing home. Her husband was being an ass about something and really liked driving the Benz - to F with him she opened the hood and disconnected some wires which he and others hadn't been able to find. The guy at the Indie place says he found it - was something in the glow plug circuit. Odd story, but life is odd. It runs pretty well after the filter is cleaned. I'm going to do the valves and check compression this week. It uses very little oil. I'm hoping this might be a sign of decent compression.
I gather that a somewhat empty tank will tend to rust over that time.