Antifreeze question?

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I am headed out of here in the morning with a load of hay, so I was checking all the fluids. Down inside the radiator neck there was some slimy green stuff in the threads, so I flipped the cap over and inside the cap where the spring is was approx. 1/2 a teaspoon of this gray gunk. It has the consistancy of baby food. I cleaned it all up, but should I be worried? I have a '95 w/ 118K. I just changed that antifreeze w/ the Fleetgaurd Complete approx. 1 year ago when I did a complete flush. Should I be concerned? Any of you guys ever checked underneath your radiator caps? Thanks in advance for the info. Jeff

 

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Bad news,it sounds like oil is leaking into your coolent some how. Check underside of your oil fill cap and see if there is white gunk on it. Has your engine over heated recently,could be a head gasket. Hopefully it could be as simple as the water you put in your raditator,water high in magnesium or sulfur can cause gray slime when mixed with other chemicals,whether antifreeze is one of them I'm not sure. It's always best to use distilled water in your rig. Good luck

 

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Could this be something left over,like radiator flush and/or some of the stuff it was supposed remove from the system, and attached it self to your radiator cap when the coolant was at normal operating tempature?

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Missouri Mule 96 White 4X4 ST club cab,(grey int. ),5 spd, 3. 54 reg dif, 8 ft bed, 1 ft high cheater boards, front and side of bed,Pofile V bug shield,
99 Freight liner FL60 blue Cummins 24v 215 hp, 520 torgue,6 spd 3. 59 no spin rear, 16 ft dry box (white) 19. 5 low profile tires,Weight 11,000, gvw 23000, 11 to 12 mpg
Bill Thomas (Wild Bill)

 

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Didnt read all of your post BUT oil pressure is greater than water(coolent ) psi.
Which means clean it out,IF it re-accures most likely oil cooler area (ie) gasket.
Dead bang cure replace cooler also.
Why? do you have a gig to pressure test the cooler tubes? NO. Does your local cummins shop ?????? most likley not. Replace it. .
The second time labor will be saved.


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96-3500 SLT EXT. CAB AM/FM/CD-RINO LINER. D-CELERATOR EXH. BRK-RED LINE VAC. OVER HYD BRK CONTROL- AIR BAGS W/HVY DUTY AIR COMP. PUTCO S/STEEL DEEPBOARDS FRONT TO REAR. REESE 20K 5TH WHEEL & GOOSE -REESE 20K HITCH BELOW W/17K RECEVER. CLEAR COATED & SOUND DEADINGING &UNDER COATED 5 SPD/W 4:10 MCHLN'S 235/16'S UNIDEN PC76/WEATHER-WILSON 1000 MAG MOUNT ANT. 4 WHL ANTI LOC BRK SYS.