david wild Posted September 1, 2018 Share Posted September 1, 2018 So what makes this engine clank and clunk, this is the worst sounding engine I have ever owned, power is fine, oil stays clean, real clean for a Mack, never gets hot on big hills, pull the hill going into Austin NV with 90k you will get hot in July, not this dog, stays cool just clanks and clunks I had overhead run twice by 2 different Mack shops, both said it's fine and sounds fine to them, I can't stand to listen to it idle, any cure other than wear ear muffs, goes down road fine just idles worse than a old pc cat. Quote Link to comment https://www.bigmacktrucks.com/topic/54176-98-e7-mack/ Share on other sites More sharing options...
Dirtymilkman Posted September 1, 2018 Share Posted September 1, 2018 It sounds good to me! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/54176-98-e7-mack/#findComment-405288 Share on other sites More sharing options...
RobM626 Posted September 1, 2018 Share Posted September 1, 2018 I don’t know if this is any help but I found that my older e7’s always sounded a little noisier than the newer ones (03-07) because I think the newer ones have spring loaded pushrods. It makes a big difference on sound especially at idle Quote Link to comment https://www.bigmacktrucks.com/topic/54176-98-e7-mack/#findComment-405290 Share on other sites More sharing options...
1965 Posted September 1, 2018 Share Posted September 1, 2018 7 hours ago, david wild said: So what makes this engine clank and clunk, this is the worst sounding engine I have ever owned, power is fine, oil stays clean, real clean for a Mack, never gets hot on big hills, pull the hill going into Austin NV with 90k you will get hot in July, not this dog, stays cool just clanks and clunks I had overhead run twice by 2 different Mack shops, both said it's fine and sounds fine to them, I can't stand to listen to it idle, any cure other than wear ear muffs, goes down road fine just idles worse than a old pc cat. Get you some straight pipes put on it & turn them to the side where you can hear it & get you a bunch of gauges put in & it’ll keep you occupied enough not to hear it clank & clunk. 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/54176-98-e7-mack/#findComment-405300 Share on other sites More sharing options...
fjh Posted September 2, 2018 Share Posted September 2, 2018 Turn up the tunes bro 1 Quote Link to comment https://www.bigmacktrucks.com/topic/54176-98-e7-mack/#findComment-405301 Share on other sites More sharing options...
Mack Technician Posted September 2, 2018 Share Posted September 2, 2018 Don’t listen too long or think too much. One night I was installing off-road lights on the CV713 tractor. I left it idle while I worked so the batteries would maintain. I started listening too much. Every so many seconds it would “Pock, Pock, Pock” a metallic hammer. Got convinced it was losing a cam. 10,000 miles later the oil sample is still clean. Quote Link to comment https://www.bigmacktrucks.com/topic/54176-98-e7-mack/#findComment-405308 Share on other sites More sharing options...
david wild Posted September 2, 2018 Author Share Posted September 2, 2018 That is the problem, runs fine, oil is perfect just sounds awful when at idle, just thought their was some cure to the noise, don't listen to radio, grew up on farm, father said you can't hear crap going wrong with radio on, 50 years later still ride listening for something to go wrong and it has, and stopped in time not to have such a big problem that I did not get home, beside not much crap on radio except for oldies stations I would listen too, even listening to the loons from the left has got to the point that I don't waste my time on their brain dead crap. Quote Link to comment https://www.bigmacktrucks.com/topic/54176-98-e7-mack/#findComment-405357 Share on other sites More sharing options...
Adam9066 Posted September 17, 2018 Share Posted September 17, 2018 I know this is kinda old but probably the air compressors. My air compressors on my e7 are noisy and clunky as hell compared to my mp8 engines. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/54176-98-e7-mack/#findComment-406144 Share on other sites More sharing options...
Mackdriver912 Posted February 13, 2019 Share Posted February 13, 2019 Have you ran the overhead lately?My e7 quieted down alot after I did that Quote Link to comment https://www.bigmacktrucks.com/topic/54176-98-e7-mack/#findComment-415627 Share on other sites More sharing options...
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