dkv411 Posted October 16, 2012 Share Posted October 16, 2012 (edited) 1999 ch613 460 e7 im running higher than normal egt's and have a sucking sound while running 20#'s or higher boost visually the only thing i found is a crack in the center section will this cause what is seeming like a charge air cooler failure? Also wil i hurt my engine if its not repaired right away? Edited October 16, 2012 by dkv411 Quote Link to comment https://www.bigmacktrucks.com/topic/27847-cracked-exhaust-manifold-1999-e7/ Share on other sites More sharing options...
rsb502 Posted October 17, 2012 Share Posted October 17, 2012 EGT's shouldnt get much higher with an exhaust manifold crack, maybe a piece missing, is there any exhaust soot around the crack? is the crack open enough to feel exhaust blowing thru at idle? I doubt it is the sound you hear, get a spray botle with soapy water and idle the truck up to about 1000rpm go spray every piece of intake piping and all connections looking for bubbles should be pretty easy to see you can do the same to the charge air cooler, I would say its a boost leak leading to higher EGT's the engine is trying to work harder and not getting the air needed to keep the temp down, E7 460's move just enough air to keep the EGT down with the stock turbo with everything in good condition. Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment https://www.bigmacktrucks.com/topic/27847-cracked-exhaust-manifold-1999-e7/#findComment-141980 Share on other sites More sharing options...
dkv411 Posted October 17, 2012 Author Share Posted October 17, 2012 It is cracked all the way to the Turbo flange i did the piping and connection from the charge air cooler and around the mounting points on the right side where i have bumper damage from a deer hitting me last night it was a fawn or doe no antlers Quote Link to comment https://www.bigmacktrucks.com/topic/27847-cracked-exhaust-manifold-1999-e7/#findComment-141997 Share on other sites More sharing options...
turckster Posted October 17, 2012 Share Posted October 17, 2012 First things first, replace the exhaust center section and inspect the turbo mount and center section. Pressure test the charge air core, Spec is pressure core to 30 psi, there should be no more than 3 psi drop in 15 seconds. Quote Link to comment https://www.bigmacktrucks.com/topic/27847-cracked-exhaust-manifold-1999-e7/#findComment-142001 Share on other sites More sharing options...
dkv411 Posted October 17, 2012 Author Share Posted October 17, 2012 That's the plan for the weekend Quote Link to comment https://www.bigmacktrucks.com/topic/27847-cracked-exhaust-manifold-1999-e7/#findComment-142002 Share on other sites More sharing options...
staxx Posted October 18, 2012 Share Posted October 18, 2012 Also check intake at air compressor and the steel piping behind the engine I find these leaking all the time if you can make or barrow a blockoff plate and pressure check whole system would be best thing to do and replace manifold with all new studs nuts gaskets. Quote Link to comment https://www.bigmacktrucks.com/topic/27847-cracked-exhaust-manifold-1999-e7/#findComment-142076 Share on other sites More sharing options...
dkv411 Posted October 18, 2012 Author Share Posted October 18, 2012 Just picked up $500 dollars worth of parts here in Stevens point wi 1 center section all new studs and gaskets and got my buddy to come in and open his shop on Saturday and hang around if i screw it up. So much for a day off this week but it'll be fixed and the air 2 air completely checked with probably new hoses and clamps on it as well. Quote Link to comment https://www.bigmacktrucks.com/topic/27847-cracked-exhaust-manifold-1999-e7/#findComment-142123 Share on other sites More sharing options...
dkv411 Posted October 18, 2012 Author Share Posted October 18, 2012 I'll definitely check the air compressor stuff that's what it sounds like is an air leak when in boost over 20 psi Quote Link to comment https://www.bigmacktrucks.com/topic/27847-cracked-exhaust-manifold-1999-e7/#findComment-142124 Share on other sites More sharing options...
dkv411 Posted October 20, 2012 Author Share Posted October 20, 2012 so my dumb a$$ only bought the center section of the manifold and well guess what? yup lost my load for monday and my truck is taking up space in my buddies shop oops. Quote Link to comment https://www.bigmacktrucks.com/topic/27847-cracked-exhaust-manifold-1999-e7/#findComment-142390 Share on other sites More sharing options...
staxx Posted October 20, 2012 Share Posted October 20, 2012 whats wrong with the end sections if they are ok just warm the slip joint up with a torch and pull apart. Quote Link to comment https://www.bigmacktrucks.com/topic/27847-cracked-exhaust-manifold-1999-e7/#findComment-142472 Share on other sites More sharing options...
hatcity Posted October 21, 2012 Share Posted October 21, 2012 IMPORTANT!!!!!!!When replacing the studs, be sure you have no less than 1.75 inches showing.Also, put a small dab of hi-temp RTV on threads before inserting into block Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment https://www.bigmacktrucks.com/topic/27847-cracked-exhaust-manifold-1999-e7/#findComment-142476 Share on other sites More sharing options...
dkv411 Posted October 21, 2012 Author Share Posted October 21, 2012 Staxx one of the outer sections broke during disassemble. Hatcity thanks for th 1.75 inch i did know about the rtv to clear up that particular oil leak Quote Link to comment https://www.bigmacktrucks.com/topic/27847-cracked-exhaust-manifold-1999-e7/#findComment-142530 Share on other sites More sharing options...
staxx Posted October 21, 2012 Share Posted October 21, 2012 That sucks if you heat them up with a torch they usaully will come apart but I have had a few break after a couple of million heat cycles they get weak I guess the exhast studs if you look in the bottom stud holes in the head they go all the way threw to the back side you can actually see the push tube in there, thats why you dont want to install them to deep and to use some silicone . 1 Quote Link to comment https://www.bigmacktrucks.com/topic/27847-cracked-exhaust-manifold-1999-e7/#findComment-142573 Share on other sites More sharing options...
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