Gravelguy413 Posted October 9, 2021 Share Posted October 9, 2021 96 EM7-300 all mechanical. Periodically oil drips out exhaust side of turbo then stops. Had turbo off nothing leaking into compressor side, no slop in shaft. Get a terrible squealing noise when truck hits 1600 rpm when driving it. While parked and revving to 1600 cannot get engine to make this noise it’s only when driving. Any ideas? Quote Link to comment https://www.bigmacktrucks.com/topic/68427-turbo-q/ Share on other sites More sharing options...
Dirtymilkman Posted October 10, 2021 Share Posted October 10, 2021 Sounds like a boot or intake leaking. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/68427-turbo-q/#findComment-481074 Share on other sites More sharing options...
Joey Mack Posted October 10, 2021 Share Posted October 10, 2021 take a look at the top right corner of the C.A.C. right where the core and side tank seem/joint is... do you have a way to remove the boot on the turbo and put 20 PSI into the C.A.C.? maybe use a p.v.c. pipe cap that is the same size as the inside diameter as the C.A.C. boot on the turbo, and drill and tap a 1/4 n.p.t. hole in it for a fitting and put shop air to it using a regulator.. use a really good clamp to hold the plug in the boot... it can pop out and hurt you or break something on the truck. My tester has small cables to hook to the truck in the case it pops out under pressure.. then you can check the C.A.C., boots, pipes, and intake gaskets, with Windex.. Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/68427-turbo-q/#findComment-481076 Share on other sites More sharing options...
Gravelguy413 Posted October 10, 2021 Author Share Posted October 10, 2021 Would an air leak also cause the turbo to leak oil out the exhaust? Quote Link to comment https://www.bigmacktrucks.com/topic/68427-turbo-q/#findComment-481078 Share on other sites More sharing options...
Joey Mack Posted October 10, 2021 Share Posted October 10, 2021 I doubt it... do you idle the truck for long periods of time without raising the idle to about 800 RPM's? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/68427-turbo-q/#findComment-481080 Share on other sites More sharing options...
fjh Posted October 10, 2021 Share Posted October 10, 2021 Check the compressor inlet tube connections at the intake and compressor end! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/68427-turbo-q/#findComment-481094 Share on other sites More sharing options...
Gravelguy413 Posted October 11, 2021 Author Share Posted October 11, 2021 Ok guys will check for an air leak. Seems like this only happens when I’m hauling a load. When I get off the throttle and rpms drop below 1600 it quits making the noise. Regarding the oil leak from turbo no I do not idle excessively Quote Link to comment https://www.bigmacktrucks.com/topic/68427-turbo-q/#findComment-481136 Share on other sites More sharing options...
Dirtymilkman Posted October 11, 2021 Share Posted October 11, 2021 That sounds like furl slobbering. When it mixes with soot it looks like oil. Quote Link to comment https://www.bigmacktrucks.com/topic/68427-turbo-q/#findComment-481170 Share on other sites More sharing options...
Gravelguy413 Posted October 12, 2021 Author Share Posted October 12, 2021 When this happens the exhaust is very blue so I assumed it was oil burning. If it is in fact fuel, what causes fuel slobbering? Quote Link to comment https://www.bigmacktrucks.com/topic/68427-turbo-q/#findComment-481194 Share on other sites More sharing options...
Dirtymilkman Posted October 12, 2021 Share Posted October 12, 2021 38 minutes ago, Gravelguy413 said: When this happens the exhaust is very blue so I assumed it was oil burning. If it is in fact fuel, what causes fuel slobbering? Weak injectors. Wore out tips. Quote Link to comment https://www.bigmacktrucks.com/topic/68427-turbo-q/#findComment-481196 Share on other sites More sharing options...
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