So I'm starting this new thread just because I really couldn't find a topic on this exact problem that I'm having. Anyway, one of our trucks blew off the hose going from the turbo to the charge air cooler. This was the first time, so I thought just maybe the clamp was loose. However, today we had the turbo hoses blow again. This time both hoses blew off. I think that one of the drivers may have taken one of the hoses off because I've never seen two hoses blow off the charge air cooler, but if I had a hose blow off, why? Would I be over boosting? If I am over boosting, why am I over boosting? Can I have a sensor reading wrong?
Maxxforce 13 blowing turbo hoses
Discussion in 'International Forum' started by avgdzlmekanic, Feb 11, 2020.
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Very easy to over boost. The waste gate needs to open to lower the boost. The waste gate is controlled by a separate valve. Lots to fail. Linkage could be seized. Sensor could be plugged and engine not seeing true pressure too.
avgdzlmekanic and QUALITYTRUCK Thank this. -
Sweet. Thanks for the pointers. What sensor would be failing if it is a sensor? What do you recommend I do to pinpoint the problem and not just throw parts at the truck?
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At the dealer level, we take them for a road test with a computer hooked up and record it. Then we review the fuel pressure, exhaust pressures and boost pressures and go from there. We can perform actuator testing on the turbo waste gate system, but again, you need the computer for that. If you don't have access to that, then you are stuck throwing parts at it, which I do not recommend.
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We do have a laptop with NED on it. So I can do most things. What am I looking for numbers wise?
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40 psi of boost under full load full rpm.
avgdzlmekanic Thanks this. -
55-65 inch pounds on the clamps. You using cheap clamps? Need t bolt clamps. Quality ones. They shouldn’t come off even if over boosting.
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Yeah I get you. We have a fleet of about 30 trucks. This is the first one that has done this to us. But it could be that they weren't torqued down correctly last EGR cooler replacement. Just weird to happen twice to us. Could be our drivers wanting overtime... Will wait and see at this point. Thanks for the inputChubby Fly Thanks this.
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