782D fun - Page 3

Oak · #21 02-15-2023, 01:23 PM

I agree 1711. I’m tempted to see if I can use a long stiff piece of wire and compressed air but I know there are places I need to get that I won’t be able.
Could a cracked head be my issue? I have no mixing of any of the fluids that I know of.

1711Cub · #22 02-15-2023, 03:12 PM

I suppose it is possible, but not likely. You can pressure test the cooling system, and see if it holds.

ol'George · #23 02-15-2023, 08:19 PM

You can try a cooling system caustic cleaner that they have for vehicles.
Also try the 2 way flush as others mentioned, that is a no cost thing.
Garden hose pressure is usually over #40 and that should dislodge some accumulation, but I'd bypass the radiator as radiators are not stout enough to withstand that high of pressure.

Oak · #24 02-15-2023, 10:45 PM

I'm going to pull the engine again and flush it.

I know the answer but I'm gonna ask.......If I pull the head can I reuse the gasket just for testing? A cheap knock off is $50-$60, Kumar $65 & OEM probably $100+.

This little sucker is getting to be a money pit.

Ambush · #25 02-15-2023, 10:48 PM

Quote:

Originally Posted by Oak

This little sucker is getting to be a money pit.

Should never have torn down that chicken coop. it could still be resting there.

I'd pull the head, then decide.

ol'George · #26 02-16-2023, 07:48 AM

I'd flush it before you pull the head.
Might flush out the surprise mouse or debris, nothing to loose!
Hard to flush with head off without blowing chit into pistons
No harm reusing the hd gskt as a test, use copper coat spray on both sides of gskt just in case it might want to leak a bit.
Being a diesel, ya it has high compression but you know that and just trying to find the "cheese" situation, and will replace later.
Edit:
Remembering either Tie otie or Hon doo had a TSB on flushing the heater core or cooling system using a recirculating pump using CLR/lime away.
Mechanic set up a 5 gal bucket and a cheap small recirculating pump.
put the solution in the bottom hose and let the top hose refill the bucket.
Seems like he let it recirculate 1/2 a day and it worked beautifully removing rust/lime
it might have been Eric from south main auto in New York but not sure.

Radioguy41 · #27 02-16-2023, 09:33 AM

I would not reuse the old gasket. The last thing you want to do with a diesel is suck some coolant into the combustion chamber while running. I've seen diesels go boom when that happens. Better safe than sorry, in my opinion.

Ambush · #28 02-16-2023, 01:55 PM

I did what Ole George just described on a forty year old four cylinder inboard engine (son of the Iron Duke).

At first I hooked up a 12V marine bilge pump in a bucket of CLR and though after several hours the water was discolored, it didn't seem to be doing much.

Then I took a 110V sump pump, which was way easier to hook up anyway because it used a pipe fitting and it had way more volume. I used some caustic from the hot tank at work and diluted it by half. It's bad stuff. Every hour or so I'd tap on the outside of the block's water jacket and got quite a bit of rust flakes, some pretty big. Back flushed it the same way for a while. I ran the CLR through it again for awhile to get the caustic out.

Oak · #29 02-16-2023, 08:06 PM

Okay, here was my setup today.
5A26533D-3B07-44BB-A46C-EEF23DD63E9F.jpg
2D1D5FAC-D398-41BD-8DFD-287B76B804E8.jpg

I ran the engine and when my bucket temp was at about 140 this is what the gauge shows.
583E9240-A750-4D3F-BD73-9D90A5E59A49.jpg

When I IR scan the block it’s pretty much what the temp is in the bucket.
837D2509-690C-400F-8067-906BF4CFCCAC.jpg

Looks like it may be a gauge issue. I’ll change that next.

darkminion_17 · #30 02-16-2023, 08:43 PM

Maybe make it straight and it will go down.