maxidyne237 Posted April 24, 2009 Share Posted April 24, 2009 This is a new one for me. Hopefully one of you guys that are wrenchin on the new stuff can help me out. Here is a weird oil leak on my '03 Granite e7 400 pre egr. It is not coming from the valve cover, it is only wet under the manifold by the lower stud. Are the manifold studs tapped into an oil passage? Well here is a pic of the problem. Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/ Share on other sites More sharing options...
MACKS Posted April 24, 2009 Share Posted April 24, 2009 You probably know this,but maybe to much idle time,I know on the older engines if they idle to much it will cause oil or fuel to seep out of the manifold gaskets. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-34307 Share on other sites More sharing options...
mackcl96 Posted April 24, 2009 Share Posted April 24, 2009 Valve seals Quote Thanks for hearing me out.You can have the soap box now---------JIM Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-34310 Share on other sites More sharing options...
fjh Posted April 24, 2009 Share Posted April 24, 2009 Valve sealsNope pull the stud out and put pipe sealant on it and put it back in!the stud opens up into the pushtube hole oil is coming from there! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-34317 Share on other sites More sharing options...
maxidyne237 Posted April 24, 2009 Author Share Posted April 24, 2009 Thanks for the replys everyone. Im going to try to pull the stud and reseal. The motor only idles long enough for turbo cool down and its only got 115,000 miles so she better not need valve seals! (also no blue smoke at start up) Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-34328 Share on other sites More sharing options...
Mackpro Posted April 24, 2009 Share Posted April 24, 2009 The bottom stud hole on the exhaust manifold is drilled all the way into the push tube hole. Oil can leak past the threads, so like fjh said, remove the stud and put some good silicone on it but put it back in at the same depth because we have seen them go in to deep and hit the push tube. I have also seen people put to much silicone on the stud and it gets pushed into the push tube cavity and blocks off oil to the roller lifter or gets between the push tube and lifter and causes a miss in engine. We put the silicone on the stud starting about an 1/4" from the end of the stud. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-34331 Share on other sites More sharing options...
mackcl96 Posted April 25, 2009 Share Posted April 25, 2009 Boy do I fell Bad on my replyfjh or Mackpro68 was that all E7's or just E-teck ??????????I seen a valve seal soak the gasket and leaked like that (I jumped the gun) Quote Thanks for hearing me out.You can have the soap box now---------JIM Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-34339 Share on other sites More sharing options...
maxidyne237 Posted April 25, 2009 Author Share Posted April 25, 2009 Thanks Mackpro good tips there. I will be sure to follow your advice. Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-34349 Share on other sites More sharing options...
Mackpro Posted April 25, 2009 Share Posted April 25, 2009 Boy do I fell Bad on my replyfjh or Mackpro68 was that all E7's or just E-teck ??????????I seen a valve seal soak the gasket and leaked like that (I jumped the gun)I dont remember the problem on the older E-7's, I have only seen it happen on the ETECH style engines, including the ASET's. Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-34353 Share on other sites More sharing options...
fjh Posted April 25, 2009 Share Posted April 25, 2009 I dont remember the problem on the older E-7's, I have only seen it happen on the ETECH style engines, including the ASET's.Ive seen it happen on All 4 valves sixes it was most prevelant on the eteck cause of the larger coarse thread studs. Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-34355 Share on other sites More sharing options...
mackcl96 Posted April 26, 2009 Share Posted April 26, 2009 OK thanks guys I need to Stand Down, I saw the picture and jump too quick but I have never seen oil on E6 and E7 studs and don't wantto own a e-teck Quote Thanks for hearing me out.You can have the soap box now---------JIM Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-34375 Share on other sites More sharing options...
fjh Posted April 26, 2009 Share Posted April 26, 2009 OK thanks guys I need to Stand Down, I saw the picture and jump too quick but I have never seen oil on E6 and E7 studs and don't wantto own a e-teckStand down Naw!With out input nobody would get things fixed!Ya need to step up to the plate when ever possible! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-34385 Share on other sites More sharing options...
Frederick Brown Posted October 16, 2021 Share Posted October 16, 2021 Same problem fuel not oil clean around the injector lines on top of the manifold run the engine if the lines are leaking you will see it leaking from the injector lines has to be clean if not it looks like it’s leaking from out the exhaust manifold. Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-481449 Share on other sites More sharing options...
Mark22300 Posted January 18, 2023 Share Posted January 18, 2023 did you ever fix your leak? I seem to be having the same issue on my 02 E7-460P. Wondering if I do studs and gaskets if it will go away. Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-522784 Share on other sites More sharing options...
Vmac3 Posted January 18, 2023 Share Posted January 18, 2023 If you do go ahead and do the job make sure the studs and the stud holes are clean. Reseal the studs with teflon and you should be good to go. Dont drive the studs too deep because the lower studs will contact the pushrods. If you are not sure how deep those studs go measure the old ones before you remove them. V 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-522871 Share on other sites More sharing options...
Onyx610 Posted January 18, 2023 Share Posted January 18, 2023 1 Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-522920 Share on other sites More sharing options...
Mark22300 Posted January 18, 2023 Share Posted January 18, 2023 7 hours ago, Onyx610 said: Awesome that's a huge help! where do I get one of those books? is there an online version? Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-523000 Share on other sites More sharing options...
Joey Mack Posted January 18, 2023 Share Posted January 18, 2023 I get 'Downloads' from ,,,,, mypowermanuals.com..... Then I put them on 2 seperate cd's, and load a copy into my shop laptop.. Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-523005 Share on other sites More sharing options...
Onyx610 Posted January 19, 2023 Share Posted January 19, 2023 Let me know if you need anything else. Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-523019 Share on other sites More sharing options...
Onyx610 Posted January 19, 2023 Share Posted January 19, 2023 Get new fuel lines too Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-523021 Share on other sites More sharing options...
Popular Post Joey Mack Posted January 19, 2023 Popular Post Share Posted January 19, 2023 (edited) New fuel lines are always a good idea, however at around $135.00/ea. you are looking at around $850+.. So what I have done many times, ( with my customers permission to try it) is.... I use 320 Emory cloth in my finger tips and rotate the ball ends in my fingers until the groove is gone or nearly gone, then flush them out with brake clean. I follow the torque conditioning procedure, and I usually get them to seal good.. sometimes one or two want to stay bad, so I replace them. Not to take away from Onyx's correct statement.. Just offering a way to save a few buck's. Keep in touch.. jojo Edited January 19, 2023 by Joey Mack poor sperring.. 3 Quote Link to comment https://www.bigmacktrucks.com/topic/9156-strange-e7-oil-leak/#findComment-523023 Share on other sites More sharing options...
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