stanisicb Posted June 2, 2010 Share Posted June 2, 2010 Hello everybody I was wondering if anyone can help me out. I have a 2004 mack granit 460 today I opened the hood to check the oil anyways i noticed slight oil leak coming from exhaust manifold where it bolts on the motor. It doesnt make sence to me so i was wondering if anyone can help me out. Quote Link to comment https://www.bigmacktrucks.com/topic/14159-oil-leak-exhaust-manifold/ Share on other sites More sharing options...
Mackpro Posted June 2, 2010 Share Posted June 2, 2010 The bottom exhaust manifold bolt holes in the heads are drilled all the way into the push tube opening. Oil runs down the push tube to the lifter, the oil stays there and can come out past the lower exhaust manifold stud. We remove the bottom studs and put silicone/RVT on the threads (threads of the stud only)on the stud and reinstall. It's a common problem . All ETECH style engines are like this. Quote Link to comment https://www.bigmacktrucks.com/topic/14159-oil-leak-exhaust-manifold/#findComment-56377 Share on other sites More sharing options...
stanisicb Posted June 2, 2010 Author Share Posted June 2, 2010 The bottom exhaust manifold bolt holes in the heads are drilled all the way into the push tube opening. Oil runs down the push tube to the lifter, the oil stays there and can come out past the lower exhaust manifold stud. We remove the bottom studs and put silicone/RVT on the threads (threads of the stud only)on the stud and reinstall. It's a common problem . All ETECH style engines are like this.Thank you very much for your help. Quote Link to comment https://www.bigmacktrucks.com/topic/14159-oil-leak-exhaust-manifold/#findComment-56388 Share on other sites More sharing options...
Jesus Zamudio Posted January 19, 2020 Share Posted January 19, 2020 Hello, I have a 2003 Mack ch600 and it’s leaking oil from the bottom studs of the manifold. On a job like this rough estimate how much does it cost. I am located in the greater Houston area. Quote Link to comment https://www.bigmacktrucks.com/topic/14159-oil-leak-exhaust-manifold/#findComment-440822 Share on other sites More sharing options...
Mack Technician Posted January 19, 2020 Share Posted January 19, 2020 JZ, hit up your local Mack dealership for a quote. They have the program in their system to pound out SRT (standard repair time) and parts fast. Hard for us to know what the going rate is around your area. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/14159-oil-leak-exhaust-manifold/#findComment-440853 Share on other sites More sharing options...
HeavyHaulinMac Posted February 4, 2020 Share Posted February 4, 2020 I also have this problem on my #1 cylinder on my E7 350. Same fix or am I in trouble? ThanksSent from my SM-G892A using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/14159-oil-leak-exhaust-manifold/#findComment-441934 Share on other sites More sharing options...
fjh Posted February 4, 2020 Share Posted February 4, 2020 57 minutes ago, HeavyHaulinMac said: I also have this problem on my #1 cylinder on my E7 350. Same fix or am I in trouble? Thanks Sent from my SM-G892A using Tapatalk same fix! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/14159-oil-leak-exhaust-manifold/#findComment-441935 Share on other sites More sharing options...
HeavyHaulinMac Posted February 4, 2020 Share Posted February 4, 2020 THANK YOU!!Sent from my SM-G892A using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/14159-oil-leak-exhaust-manifold/#findComment-441940 Share on other sites More sharing options...
Chinos transport Posted July 7, 2023 Share Posted July 7, 2023 Hi about this problem of the exhaust manifold leaking oil. Where can I font the bolt that’s not the dealer I went and said don’t have any now. I’m order but may be long any number for Amazon or something? Just asking thanks Quote Link to comment https://www.bigmacktrucks.com/topic/14159-oil-leak-exhaust-manifold/#findComment-534329 Share on other sites More sharing options...
Joey Mack Posted July 7, 2023 Share Posted July 7, 2023 PAI sells exhaust stud kits. I assume you have an E-Tech engine. You posted on a 3 year old thread, and there isn't enough info about what truck you have.. Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/14159-oil-leak-exhaust-manifold/#findComment-534335 Share on other sites More sharing options...
880joe Posted July 8, 2023 Share Posted July 8, 2023 I just bought a pai exhaust kit today. pai part# 831016 about 230 dollars 12 studs 12 nuts and 6 gaskets 1 Quote Link to comment https://www.bigmacktrucks.com/topic/14159-oil-leak-exhaust-manifold/#findComment-534374 Share on other sites More sharing options...
Chinos transport Posted July 8, 2023 Share Posted July 8, 2023 Thanks yea sorry new here. I have a ac427 engine in a 05 Mack ch and yea one of my studs are leaking so I’m looking for one I bought the gaskets already. So hoping for studs number thanks Quote Link to comment https://www.bigmacktrucks.com/topic/14159-oil-leak-exhaust-manifold/#findComment-534423 Share on other sites More sharing options...
880joe Posted July 9, 2023 Share Posted July 9, 2023 I'll look in pai book tomorrow and get you a part# if someone else doesn't get you one sooner Quote Link to comment https://www.bigmacktrucks.com/topic/14159-oil-leak-exhaust-manifold/#findComment-534441 Share on other sites More sharing options...
880joe Posted July 9, 2023 Share Posted July 9, 2023 PAI part number for exhaust stud EST-0421 Quote Link to comment https://www.bigmacktrucks.com/topic/14159-oil-leak-exhaust-manifold/#findComment-534472 Share on other sites More sharing options...
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