Junk in the cooling system
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From: Turlock CA
Junk in the cooling system
Ok this weekend I changed one of the rear side freeze plugs just in front of the starter on my 65 352. When I popped the old one out the fluid that came out was black and stunk like stagnet water. I flushed it real good with the water hose and could not believe the chunks that were coming out of this thing. I also used a radiator flush chemical before adding the new fluids. I also observed the flow in the radiator while it was hot, I didn't think they moved that much fluid..It circulates realy good.
How can this be?
The engine has never run hot on me. But my dad said that when he used to pull his fith wheel with it, it would get hot, not boil over hot but hotter than normal.
I have a new radiator water pump and everything else is new.
Back about twenty something years ago my dad had the truck painted and got into an argument with the painter. My dad has always claimed that the painter did something to the truck. Could he have dumped something into the radiator. The motor was rebuilt just prior to the paint job and only has 56,000 miles on it.
Is this normal?
How can this be?
The engine has never run hot on me. But my dad said that when he used to pull his fith wheel with it, it would get hot, not boil over hot but hotter than normal.
I have a new radiator water pump and everything else is new.
Back about twenty something years ago my dad had the truck painted and got into an argument with the painter. My dad has always claimed that the painter did something to the truck. Could he have dumped something into the radiator. The motor was rebuilt just prior to the paint job and only has 56,000 miles on it.
Is this normal?
Last edited by jd_sylvia; Jul 30, 2006 at 09:17 AM.
Cargo Master
Joined: Apr 2004
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From: Golden, CO
I've seen all kinds of gawdawfull stuff come out of 10 & 15 year old blocks. The fact that a 20 year old block has sediment is not surprising. One company I worked for was having the fire sprinkler system expanded. Every steel (?) pipe those guys took apart had a nasty, black, smelly, oily residue come out. I asked what it was, they said water and corrosion.
Sediment collects at the back of the block because the flow exits the deck to the heads. It's basically a dead spot at the bottom. I've been told the heater core is another sediment collector, especially for stop-leak.
As for the heat, most of that is at the top of the cylinder. I have heard of people hard blocking the water jacket up to the water pump holes for improved compression sealing and block stability. They weren't too concerned about overheating their weekend warriors with the high pressure pumps and 30lb caps.
Hope this helps, Mike
Sediment collects at the back of the block because the flow exits the deck to the heads. It's basically a dead spot at the bottom. I've been told the heater core is another sediment collector, especially for stop-leak.
As for the heat, most of that is at the top of the cylinder. I have heard of people hard blocking the water jacket up to the water pump holes for improved compression sealing and block stability. They weren't too concerned about overheating their weekend warriors with the high pressure pumps and 30lb caps.
Hope this helps, Mike
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From: Turlock CA
Thanks Mike
I haven't noticed any differance in the way it is cooling after I flushed all that junk out. I know exactly what you are talking about with fire sprinklers, that is one of the parts of my job is maintaining and inspections of our system.
I haven't noticed any differance in the way it is cooling after I flushed all that junk out. I know exactly what you are talking about with fire sprinklers, that is one of the parts of my job is maintaining and inspections of our system.
Postmaster
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From: Pittsburgh
About 4 months ago I replaced the freeze plugs on a '67 390 that had never been touched and I know right what you mean. It was just chunks and chunks of this rust colored sludge that never seemed to end. I took a jet nozzle for a garden hose and shot it al up in there, trying to break it p as much as possible.
It's never had an issue running hot, ever but it kinda blows my mind to think how little water moved around the rear cylinder of the passengers side.
Justin
It's never had an issue running hot, ever but it kinda blows my mind to think how little water moved around the rear cylinder of the passengers side.
Justin
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From: Turlock CA
Sounds like we had the same thing going on. I never had a heating problem either. My dad thought he had but I think it was just the fresh rebuild break in that was running hotter.
Thanks for the info.
Thanks for the info.
Postmaster
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From: Pittsburgh
re-reading this I actually just thought of something. right after (about a week) I flushed all of the sludge out of my cooling system my radiator sprung a leak. I wonder if the recirculating gunk had kept the hole sealed, then once it was all cleaned out the new antifreeze washed the gunk away from the hole.
Might be something to watch for if your radiator is older.
Justin
Might be something to watch for if your radiator is older.
Justin
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From: Turlock CA
I have ran into that problem before. I won't run a flush on an older radiator just for that reason.
As cheap as radiators are these days I just replace them.
As cheap as radiators are these days I just replace them.
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From: lino lakes, mn
all castings are made with sand molds they get washed at assembly time but some stays in the block and the constent heating and cooling of water creates sedement (look in a used tea pot) this is one reason you should flush your cooling system every few years