Rusty coolant pipe, L series

[Bogantaxi]

I was just wondering if anyone else has had this problem, and if so how they rectified it. I did do a search on a few forums, but could not find any info on this problem, so please excuse me if this has already been covered. On the right side block section of an EA82 there is a little steel water pipe (like a steel insert) which has a heater sized coolant hose attached. the problem is after years of probably running water only/shit coolant it has rusted to the point that it will just about disintegrate as soon as you touch it. The only problem is that I don't think this pipe is meant to be replaceable, I got the parts guy at work (I work at a subaru dealer) to check the original parts diagrams and this part does not have a part number, it is actually part of the block. surely there is a way the fix it without changing the whole motor, I was thinking maybe get a new alloy pipe alloy welded to the block? otherwise maybe try and find a new steel pipe, drill out the old insert then press the new one in? Any other idea's?

Also, the car seems to run warm, the temp needle often sits on the white line at the top between normal and hot, but never actually goes into the red. I dont think it is actually overheating because it does not lose power of anything and the engine bay feels physically cool. Although the other day I took it down a long hilly dirt road, and I was giving it a bit of a hard time and the overflow tank started boiling. It has a brand new water pump and a radiator full of brand new genuine subi coolant, I think I might replace the thermostat.

Also the car is a stock L series wagon D/R man, N/A EA82

[discopotato03]

I just had a look at my EA82 , which is an EFI turbo one BTW , and the heater hoses run from the inlet manifold to the heater and from the water pumps steel line than runs over the top of the pass side engine case .

I gather the carby manifolds are different but the flow path should be the same .
At worst I guess you could be up for an inlet manifold though you may be able to pick the remains of the steel tube out and tap the hole for a brass barbed fitting of the right size to suit the rubber hose .

A .

[Bogantaxi]

This is not actually the heater hose though, it goes from below the thermostat housing to the top of the block, under the intake manifold

[TOONGA]

yes I know that little pipe the ea81 block has one as well it is pressed into the block (some will say cast into the block)

the cure

find a brass or copper pipe just larger in diameter than the steel pipe if you cant get brass or copper use steel

if you cant get a good enough grip on the pipe with vice grips to pull it out (trust me it will come out) drill it out and replace it with said copper or brass pipe

note if you drill it out you will need to make sure the drill is slightly smaller than the diameter of the replacement pipe

cut you new pipe to length, I cut mine longer than the old one so when Id finished tapping it in I could cut the deformed bit off

now gently tap the new pipe in, you can layer silicon on the outside of the pipe but if you do it right the new pipe should be press fit into the hole

put you hose back on and refill your radiator

TOONGA

[Bogantaxi]

yes I know that little pipe the ea81 block has one as well it is pressed into the block (some will say cast into the block)

the cure

find a brass or copper pipe just larger in diameter than the steel pipe if you cant get brass or copper use steel

if you cant get a good enough grip on the pipe with vice grips to pull it out (trust me it will come out) drill it out and replace it with said copper or brass pipe

note if you drill it out you will need to make sure the drill is slightly smaller than the diameter of the replacement pipe

cut you new pipe to length, I cut mine longer than the old one so when Id finished tapping it in I could cut the deformed bit off

now gently tap the new pipe in, you can layer silicon on the outside of the pipe but if you do it right the new pipe should be press fit into the hole

put you hose back on and refill your radiator

TOONGA

So you mean just normal straight copper pipe like plumbers or gas fitters use or a pipe like/barbed fitting?

[TOONGA]

normal pipe like the plumbers use is what I used, if you can find a barbed fitting from somewhere use it as it will hold the hose on better

TOONGA