Hear boiling coolant from water pump / top hose - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 7 (permalink) Old 10-12-2012, 04:09 AM Thread Starter
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Hear boiling coolant from water pump / top hose

It seems like just about every time I get home I hear the coolant boiling inside the engine when I shut it off. The engine gets hot every time I climb the mountain to get home. 205* water temp. 230* oil temp.


Today it was worse because I tried to take the cap off while coolant was hot. It started to boil at the pump and you could hear it bubble for about 5 minutes. It sounded and felt like the water pump, top hose, and top of the radiator all had boiling coolant.

Now, it should be said that I have diesel fuel in my coolant, but I think I heard it before my injector cup(s) cracked.

Could overheating have caused cup cracking?

Is coolant possibly not passing through the entire block? It's a freshly built engine that was dry just 1000 miles ago.

1997; New 5 Speed, New Long Block .30 over, Mahle piston Teflon skirt, Stelite valves/seats, Smith Bro Push Rod, HFHV IDM, ARP studs, 910 springs, 238/80; Gearhead Tunes; Adrenalin; S366; Turbo blankie; Fluidampr; Irate fuel; 6.0 Cooler+fan, Coolant Filter; Caltracs; GearVendor, TrueTrac, TrueBeast, never perfect. Need 06+ Axles.
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post #2 of 7 (permalink) Old 10-12-2012, 12:32 PM
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Re: Hear boiling coolant from water pump / top hose

Fix the cracked injector cup(s) and drain and flush the cooling system. Replace with the correct mixture of coolant and water and remember to put the additive in to prevent cavitation and worm holing.

97 F-350 XLT CC DRW 4X4 PSD, 285/75-16 Custom bumpers, Gauges-boost/egt/trans, Swamps IDM, 3.5"dp- 4" exh., 3" Body lift, ES bushings/mounts, Built trans, billet conv, B&M pan, Hayden cooler, Adrenaline, stage 2's, IC, H2E, E-fuel
ARP's, 910's, Smith Bros. to come
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post #3 of 7 (permalink) Old 10-12-2012, 06:07 PM Thread Starter
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Re: Hear boiling coolant from water pump / top hose

So does diesel fuel lower the boiling point? My concern is air bubles inside the block causing hot spots and lack of flow. There shouldnt be boiling at normal operating temperatures.

1997; New 5 Speed, New Long Block .30 over, Mahle piston Teflon skirt, Stelite valves/seats, Smith Bro Push Rod, HFHV IDM, ARP studs, 910 springs, 238/80; Gearhead Tunes; Adrenalin; S366; Turbo blankie; Fluidampr; Irate fuel; 6.0 Cooler+fan, Coolant Filter; Caltracs; GearVendor, TrueTrac, TrueBeast, never perfect. Need 06+ Axles.
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post #4 of 7 (permalink) Old 10-13-2012, 05:15 AM
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Re: Hear boiling coolant from water pump / top hose

The diesel fuel can create all sorts of issues with the cooling system. You need to fix the cause of the problem and go from there in order to correct the problem.

97 F-350 XLT CC DRW 4X4 PSD, 285/75-16 Custom bumpers, Gauges-boost/egt/trans, Swamps IDM, 3.5"dp- 4" exh., 3" Body lift, ES bushings/mounts, Built trans, billet conv, B&M pan, Hayden cooler, Adrenaline, stage 2's, IC, H2E, E-fuel
ARP's, 910's, Smith Bros. to come
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post #5 of 7 (permalink) Old 10-14-2012, 04:08 PM
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Re: Hear boiling coolant from water pump / top hose

Did you get a long block or short block rebuild? I agree on getting the issue with fuel in the coolant fixed first.

1996 F250 Powerstroke 4X4 AUTO
DP-Tuner F-6 chip live tuned, BTS Transmission, Garrett 38R Turbo, Swamps Injectors 150cc, electric fuel,
Banks Intercooler, Reflexxions Cowl Hood, 17 degree HPOP, 4" Stainless Magnaflow &
Aeroturbine exhaust, Aeroforce OBD Scan Gauge, Truxedo tonneau cover
Dana 60 Precision Metal Fab RSK and SD Springs
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post #6 of 7 (permalink) Old 10-16-2012, 03:41 AM Thread Starter
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Re: Hear boiling coolant from water pump / top hose

Actually it's a long block. I don't know what would have caused this, but at least one is leaking. I'd be very surprised if they used non Alliant cups. They really do go through a lot to build these blocks. The heads alone go through some kind of vibrating media bin, vibration plate thing, and cryogenic treatment. Three angle valve treatment, Stellite valve seats, and valves, 910 springs, and they were installed on the block with ARP studs.

Why they would fail in 1000 miles, I have no idea.

1997; New 5 Speed, New Long Block .30 over, Mahle piston Teflon skirt, Stelite valves/seats, Smith Bro Push Rod, HFHV IDM, ARP studs, 910 springs, 238/80; Gearhead Tunes; Adrenalin; S366; Turbo blankie; Fluidampr; Irate fuel; 6.0 Cooler+fan, Coolant Filter; Caltracs; GearVendor, TrueTrac, TrueBeast, never perfect. Need 06+ Axles.
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post #7 of 7 (permalink) Old 10-16-2012, 03:25 PM
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Re: Hear boiling coolant from water pump / top hose

Wrong sealant used when installing them would be my initial guess.

1996 F250 Powerstroke 4X4 AUTO
DP-Tuner F-6 chip live tuned, BTS Transmission, Garrett 38R Turbo, Swamps Injectors 150cc, electric fuel,
Banks Intercooler, Reflexxions Cowl Hood, 17 degree HPOP, 4" Stainless Magnaflow &
Aeroturbine exhaust, Aeroforce OBD Scan Gauge, Truxedo tonneau cover
Dana 60 Precision Metal Fab RSK and SD Springs
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