Not too pretty, should I worry?

[nicktennear]

Having a bit of an adventure replacing some hoses but making progress after a recommendation of finding a proper motor factors, really can't fault a bloke in blue overalls can you? Anyway, started putting new pipes in this evening and was a bit worried about a rusty ring mark so thought I'd have a look at the old insert and this is what I found. They found better on the Mary Rose.



Any ideas of possible damage to innards? Anything I can do to counter possible damage? I'm planning on a good flush before replacing coolant but should I look at an additive to the plain water I was going to use? Thanks.

[CovKid]

where, what?

[itchyfeet]

Hard to see scale but my guess is heater hose?
Damaged or rubbed through ( mine rubbed through on a driveshaft when heavily loaded before i had it)
This was added as a joiner, I had a similar piece of corroded metal now have an off cut of stainless tube.

[nicktennear]

Sorry, not a quiz. It leaves the engine at 25mm then reduces down to 16mm to go into the LPG reducer. When I bought the van 4ish years ago the coolant was brown tinged but since then hasn't been too bad. Probably changed coolant very year since then, obviously not by choice.

[tforturton]

Hope you're not serious about using plain water. These engines need the correct coolant, and in the correct ratios as well, or the head studs corrode pretty quickly.

[Oldiebut goodie]

For flush!

[tforturton]

Ah yes! Sorry. I did read the post a few times, but still missed the vital part. Old age doesn't come alone....

[nicktennear]

Yes, just flushing with water then refill with appropriate coolant.

Web searches reveal a lot of flush additives but I can't help but think these are snake oils that could do more harm. I've got aluminium connectors now too.