les mar Posted October 20, 2013 Share Posted October 20, 2013 I have a cx613 with a 460 e7 I went to run the overhead and started at #1 when I got to # I reached over and just rattled #1 and the exhaust had about 1/4 inch play and so did the exhaust on #5 which was the last one done but only on the exhaust valves after adjusting all 6 holes as I went though them it was the same all the way though the last 2 holes done were loss is this normal??? it dose have noise there like the overhead is loss and did to start that's why I run the overhead to start with. I just bought this truck and the oil pressure is low also 12lbs @ idle and the plugs are all in Quote Link to comment https://www.bigmacktrucks.com/topic/33201-2001-e7-valve-adjustment/ Share on other sites More sharing options...
theakerstwo Posted October 20, 2013 Share Posted October 20, 2013 dynatard cam Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/33201-2001-e7-valve-adjustment/#findComment-212556 Share on other sites More sharing options...
les mar Posted October 20, 2013 Author Share Posted October 20, 2013 why is the dynatard cam so different then any others and how do you adjust the overhead on those Quote Link to comment https://www.bigmacktrucks.com/topic/33201-2001-e7-valve-adjustment/#findComment-212571 Share on other sites More sharing options...
Challenger Posted October 20, 2013 Share Posted October 20, 2013 A 2001 shoud be an Etech. Does it have an engine brake? Are there spring loaded push tubes? Are you pushing down on the rocker to take out the push tube spring play while adjusting the valve? Quote Link to comment https://www.bigmacktrucks.com/topic/33201-2001-e7-valve-adjustment/#findComment-212576 Share on other sites More sharing options...
les mar Posted October 20, 2013 Author Share Posted October 20, 2013 this engine has 690 jakes and the push tubes are solid not springed. I just haven't had this type of problem before where when you get 3hole done the last to have that type of play. I have an e7 service manual and it have any info on this and I would sure like to get it figured out Quote Link to comment https://www.bigmacktrucks.com/topic/33201-2001-e7-valve-adjustment/#findComment-212592 Share on other sites More sharing options...
David Posted October 21, 2013 Share Posted October 21, 2013 Is the balancer marked every 120 degrees? Two points on the indicator? Are you sure your not 180 off on the crank position? Quote Link to comment https://www.bigmacktrucks.com/topic/33201-2001-e7-valve-adjustment/#findComment-212607 Share on other sites More sharing options...
les mar Posted October 22, 2013 Author Share Posted October 22, 2013 this truck starts and run great but has noise . maybe I need to go old school and dial it in that sure fire for getting at the bottom of the lob? haven't had to do that sense the ol 270's Quote Link to comment https://www.bigmacktrucks.com/topic/33201-2001-e7-valve-adjustment/#findComment-212755 Share on other sites More sharing options...
les mar Posted November 3, 2013 Author Share Posted November 3, 2013 ok I have tried to dial to the bottom of the cam and tried to set the exhaust when the intake just starts to close which should put your exhaust on the bottom of the lob and this full thing wont even start you can hear the exhaust valves are open so I set it with the timing marks and it starts and runs great do the epu's run off the cam because it acts like there are 2 stages on the cam? and it still has the 1/4 in play at times on each exhaust. should it have the spring type push tubes? cant find any info on this on the internet. thanks for the help Quote Link to comment https://www.bigmacktrucks.com/topic/33201-2001-e7-valve-adjustment/#findComment-214868 Share on other sites More sharing options...
Back In Black Pulling Posted November 6, 2013 Share Posted November 6, 2013 Isn't the flywheel marked on the e7 's ? not like e9 on balancer Quote Link to comment https://www.bigmacktrucks.com/topic/33201-2001-e7-valve-adjustment/#findComment-215263 Share on other sites More sharing options...
hatcity Posted November 6, 2013 Share Posted November 6, 2013 Yes the flywheel is marked. On the bottom is a small "window" for setting the valves.Get a good engine barring tool for turning over just enough.Otherwise, I do not know how, but that's why I pay a guy to do it Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment https://www.bigmacktrucks.com/topic/33201-2001-e7-valve-adjustment/#findComment-215271 Share on other sites More sharing options...
staxx Posted November 6, 2013 Share Posted November 6, 2013 Valve adjustment should be done from the flywheel markings , remove the six 8mm bolts from bottom of flywheel housing remove cover marking are 1,6 3,4 2,5 . put marking in window and find cylinder on valve overlap and adjust that cylinder both intake and exhaust ,jake at same time .then turn to next adjustment 1 Quote Link to comment https://www.bigmacktrucks.com/topic/33201-2001-e7-valve-adjustment/#findComment-215302 Share on other sites More sharing options...
les mar Posted November 9, 2013 Author Share Posted November 9, 2013 I can get every thing set and it runs great but the noise and when you do 1-5 and get to 3 the no.1 and 5 have a lot of play almost a 1/4 in and it dose this thought the hole process you get the next one done and the last couple are loose and when I start back at 1 there right where they need to be.. and a cat turn over tool works great on the e7 the fly wheel is marked clearly . I just need to figure out why I have the rattle and cant get rid of it ,it drives me nuts and that a short enuff trip anyway. Quote Link to comment https://www.bigmacktrucks.com/topic/33201-2001-e7-valve-adjustment/#findComment-215801 Share on other sites More sharing options...
staxx Posted November 9, 2013 Share Posted November 9, 2013 1/4 is normal on a Mack , I would be worried about a cam lobe going down though. Do you hear a high pitched chirp at all ? Did you adjust the valve bridges? And you should try running the engine with the belts off ,the clutch fans can make a lot of rattling noises sometimes. Quote Link to comment https://www.bigmacktrucks.com/topic/33201-2001-e7-valve-adjustment/#findComment-215807 Share on other sites More sharing options...
wilbur Posted December 16, 2013 Share Posted December 16, 2013 You don't adjust them on the overlap stroke. If 1@6 are in the window on flywheel housing,check #1 to see if one is tight and one is loose [overlap\ if it is adjust #6 or visa versa. once you get that done you can go in sequence with the firing order. Overlap is when one valve is opening the other is closing, do not adjust on this stroke. The cylinders need to add up to 7. #I on overlap ,adjust 6. #3 on over lap adjust 4. and so on.Once you get the 1st cylinder done whatever number it might be you can just follow the firing order. Quote Link to comment https://www.bigmacktrucks.com/topic/33201-2001-e7-valve-adjustment/#findComment-221780 Share on other sites More sharing options...
rickykarenpr Posted December 30, 2013 Share Posted December 30, 2013 the truck have engine brake?? Quote Link to comment https://www.bigmacktrucks.com/topic/33201-2001-e7-valve-adjustment/#findComment-223919 Share on other sites More sharing options...
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