CTS2 Posted February 27 Share Posted February 27 The owners manual says that I need a special tool to adjust the valves. Part number J-37092. Do I really need this tool, or is it something that just makes it easier? Only planning to adjust the valves due to it not being known how long since they were done, and I will be replacing a leaking rocker cover gasket, so it seemed like a good idea. Quote Link to comment https://www.bigmacktrucks.com/topic/73918-en7-valve-adjustment-tool/ Share on other sites More sharing options...
mechohaulic Posted February 27 Share Posted February 27 is this an engine with the dyna tard brake; having large (1 1/8 th ?) lock nut ??if so NO you don't need fancy tool, being around when these first came out (dam there's the age thing again) ;; engines came before the tools. open end wrench and screw driver to adjust. fancy tool just "made life easier" . and it was a pain - in - a==s to use. 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73918-en7-valve-adjustment-tool/#findComment-547308 Share on other sites More sharing options...
mechohaulic Posted February 27 Share Posted February 27 it's ONLY for exhaust rocker having enlarged dia. due to oil controlling engine brake operation. flip the "brake "switch on ; oil filled the rocker cyl to remove any free clearance ; thus holding exhaust valve open; results of which were very little holding back and a pathetic exhaust noise. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73918-en7-valve-adjustment-tool/#findComment-547309 Share on other sites More sharing options...
fjh Posted February 28 Share Posted February 28 You have all the tools you need! man 11/8 wrench a flat blade screw driver and your thumb! 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73918-en7-valve-adjustment-tool/#findComment-547327 Share on other sites More sharing options...
mechohaulic Posted February 28 Share Posted February 28 now there's a positive for my morale; I still remembered it was an 1 1/8th lock nut. ambitious person could take an old short screw driver attach (almost said braze it ) a piece of 1/16th ? flat stock long enough to reach across the exhaust adjuster to end of screw driver . some times it was challenging to use flat screw driver to hold only one side of adjuster while tightening 1 1/8 lock nut. as with many fancy/expensive tools today = not using them regular why spend the $$$$: make one. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73918-en7-valve-adjustment-tool/#findComment-547350 Share on other sites More sharing options...
fjh Posted February 29 Share Posted February 29 21 hours ago, mechohaulic said: now there's a positive for my morale; I still remembered it was an 1 1/8th lock nut. ambitious person could take an old short screw driver attach (almost said braze it ) a piece of 1/16th ? flat stock long enough to reach across the exhaust adjuster to end of screw driver . some times it was challenging to use flat screw driver to hold only one side of adjuster while tightening 1 1/8 lock nut. as with many fancy/expensive tools today = not using them regular why spend the $$$$: make one. They offered up lots of special tools over the years most never used by me! Always had a work around for most! to this day they make the dealers buy" essential " tools many of them virtually not needed for everyday use! The first tools they sent us when the Volvo guys took over was brackets to remove the engines with! This instilled confidence that the product was going to have longevity I guess🤣 ! 🙄 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73918-en7-valve-adjustment-tool/#findComment-547402 Share on other sites More sharing options...
Joey Mack Posted February 29 Share Posted February 29 Yep, and the tool set for M-Drives is very expensive. We had to buy it, however, we were not allowed to repair the main box. We had to send it out as a core and install a new reman box. So the tools just sit there on the shelf Quote Link to comment https://www.bigmacktrucks.com/topic/73918-en7-valve-adjustment-tool/#findComment-547404 Share on other sites More sharing options...
fjh Posted February 29 Share Posted February 29 1 minute ago, Joey Mack said: Yep, and the tool set for M-Drives is very expensive. We had to buy it, however, we were not allowed to repair the main box. We had to send it out as a core and install a new reman box. So the tools just sit there on the shelf EXSATLY 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73918-en7-valve-adjustment-tool/#findComment-547406 Share on other sites More sharing options...
CTS2 Posted March 1 Author Share Posted March 1 On 2/28/2024 at 7:13 AM, mechohaulic said: is this an engine with the dyna tard brake; having large (1 1/8 th ?) lock nut ??if so NO you don't need fancy tool, being around when these first came out (dam there's the age thing again) ;; engines came before the tools. open end wrench and screw driver to adjust. fancy tool just "made life easier" . and it was a pain - in - a==s to use. Yes, it has a dynatard engine brake. But at this point I don't know any more than that as I haven't removed the rocker cover yet. Quote Link to comment https://www.bigmacktrucks.com/topic/73918-en7-valve-adjustment-tool/#findComment-547485 Share on other sites More sharing options...
mechohaulic Posted March 2 Share Posted March 2 valve adjusting engines with dynatard not much different then before dynatard came to be . should be intake 16/ exhaust 24. important difference is to make sure exhaust slave cly completely compressed , either push down by hand or turn adjuster in till it bottoms then back off for adjustment. purpose is to empty slave cyl of any oil.so when eng brake applies it will fill slave cyl removing valve /rocker adjustment = holding exhaust valve open and you get to hear the meek putt putt noise. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73918-en7-valve-adjustment-tool/#findComment-547524 Share on other sites More sharing options...
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