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Casting Sand


Mack Technician
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Not yet. But I remember the days of roasted air compressors on the 2001 engines. If the paint was cooked off the head of the compressor, you knew you had a casting sand problem. We had 2 trucks in one day blow the air compressor head gasket and pump coolant back through the air intake and go right into #6 cylinder. Bent the connecting rod so bad on one truck  we had to cut it out with a torch. 

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1 hour ago, Mackpro said:

I believe the coolant filter became an option around 2001. It was a less than $50 option and lots of fleets didn’t opt for it . 10 years later the counter bore in the block would be pitted so bad that it was borderline to cut and save . 

Would that happen even if the owner kept up the SCA treatment?

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  • 1 month later...

Here's the cure boys. It's not the prettiest set-up for remediation of casting sand, but you have my guarantee it works. I have a unit that plugged the heater core with casting sand twice in a month. Like some big nasty pocket of it let go inside? When your heating goes south...…….change the filter. I plan on replumbing and attaching things a bit, but this is essentially where I'm at. The filter is a non-paper, steel mesh inline strainer, NAPA #3248. The heater works fine in all settings and it was -15F down in the river valley this morning. I'm going to run it for a while, see what I capture and when it seems clean put the elbow back in or permanently move the filter closer to the cab in some straight run of factory hose.   

 

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I remember living this nightmare. My 2000 E7 460 came back on wrecker the first 5 trips I made with it, with a cooked compressor and the air lines melted off it from the sand plugging it up.

Finally got that cleared up, then it dropped a valve, LOL.

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  • 1 month later...
17 hours ago, Mack Technician said:

Found out today...…………… This isn't casting sand. Its a type of welding flux that's going free-agent into the cooling system. I'm requesting more info from Volvo, if they will send the service bulletin I'll copy it over.  

So is the engine assembly plant right next to the FAB SHOP COME ON! Give me a break!

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