The heater feed hose was leaking in my Trueno for the past couple of weeks, what started out as a small drip down the block just got worse until most of the block and a lot of the bay was a horrible orange rusty colour, and I was having to top up the radiator every morning before driving to work.
|top left hose|
The coolant was not very clean and the header bottle needed serious washing out, so I suspect that for a period somewhere in its life the engine had only water in it, so it was losing out on the anti-corrosion properties of the coolant/antifreeze. I wonder what the inside of the water galleries are like!? I have flushed it out and refilled it with a mix and will do it again in a couple of weeks and see if I can get most of the muck out of the system, though a fresh radiator is now in mind for the future.
One new hose and two new clips were ordered direct from Toyota and came in the post a couple of days later for less than €30. Access to the hose is much easier when you unbolt the vacuum sensor from the bulkhead, otherwise its a simple job. The hose that I took out was in very bad condition, with many snakebite holes after appearing. I suppose after 23yrs the rubber starts to perish a little lol :)
Anyway I checked the other heater hoses, they seem ok for now, but at least they are cheap for replacements, and I think I will get a set of those nice Samco hoses that Kev got (but in black) when I put in a new radiator someday.
I'm still waiting on some 40mm RCA's to arrive in the post which is holding up the coilover install otherwise my '86 is going great...