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DIY Valve Adjustment
when NY metro members had a tech-day in august, in courtesy of Dave (DaveOnLI), I was one of the lucky one to do the valve adjustment and this is the documentary.
before begin, you should have very good knowledge on this or you should have expert with you to do this. this document is just to show you what type of work is involved and some information regarding F20C specific information. I'd like to thank Dave for hosting, Eliot (defender), Bill (Billman250), and Kristin for helping me with this. first, people who helped me. https://c1.staticflickr.com/3/2809/3...559e26db_z.jpg Eliot & Billman. |
steps required.
1) remove valve cover. 2) turn the crank. 3) adjust valve for cylinder #1. 4) repeat 2 & 3 for cylinder 4, 3,& 2. 5) reinstall valve cover. it sounds too simple isn't it. this is where it begins. opening the hood. ;) https://c1.staticflickr.com/3/2900/3...f36cdf46_z.jpg this tool to remove spark plug cover. https://c1.staticflickr.com/3/2832/3...af9b4cd2_z.jpg removing spark plug cover. https://c1.staticflickr.com/3/2941/3...49c7b84b_z.jpg spark plug cover removed. https://c1.staticflickr.com/3/2865/3...64b03bb2_z.jpg spark plug is still in the hole. we just removed the harness. https://c1.staticflickr.com/3/2850/3...c7019d94_z.jpg Bill's trick : lift all spark plug connectors first about an inch then remove harness. |
use a pair of plier to remove hoses.
https://c1.staticflickr.com/3/2941/3...f405c7df_z.jpg I forgot what you call this but this magnetic part had some metal shave on it. of course, it was wiped with clean cloth. https://c1.staticflickr.com/3/2825/3...250625bd_z.jpg removed valve cover. make sure it's clean and no moisture. https://c1.staticflickr.com/3/2944/3...2931095c_z.jpg this is crank we turned to get cams aligned properly. we left the wrench there for duration of this work and little more....;) https://c1.staticflickr.com/3/2813/3...062178a9_z.jpg next 2 photos show how it is aligned. https://c1.staticflickr.com/3/2902/3...81d2a23b_z.jpg https://c1.staticflickr.com/3/2884/3...c1c3f8f1_z.jpg this is according to the manual. https://c1.staticflickr.com/3/2903/3...1dc7b2ff89.jpg once it's aligned, cylinder #1 is ready for valve adjustment. first, use these feeler to measure the gap. https://c1.staticflickr.com/3/2927/3...251083b6_z.jpg though this is not cyl#1, just want to show you measureing the gap. https://c1.staticflickr.com/3/2836/3...f9b36d8c_z.jpg The adjusting screw itself is a just a minus screw which you can turn it with screw driver but not until loosen locknuts on outer ream - I believe it's 7mm. so, first, loosen the locknut. turn the adjusting screw to desired gap. hold the screw. tighten the locknut. Bill had his own special tool for this. |
the manual drew it this way.
https://c1.staticflickr.com/3/2853/3...8629c01551.jpg bill's adjusting the valve with his own tool. although illustration shows using regular wrench, it's almost impossible to get that wrench like that in this small engine bay. Bill fabricated this wrench just to do the VA. https://c1.staticflickr.com/3/2859/3...07237f47_z.jpg https://c1.staticflickr.com/3/2893/3...50a66a91_z.jpg https://c1.staticflickr.com/3/2858/3...13fdedcf_z.jpg once it's done, measure it again to make sure it hasn't turned. measurement should be, intake (closer to driver side for LHD) : 0.008 - 0.010 in (0.21 - 0.25 mm) exhaust (closer to passenger side for LHD) : 0.010 - 0.011 in (0.25 - 0.29 mm) once cyl#1 is done, turn the crank clockwise to have cyl#3 cam pointing outward like \ / ... . and adjust valve on cyl#3 as same method as before. repeat this for cylinder #4, then #2. The order of adjusting valve is as follow. cylinder #1 cylinder #3 cylinder #4 cylinder #2 you could mix it but why would you make it harder? https://c1.staticflickr.com/3/2921/3...71feef6f_z.jpg |
after everything was on, make sure not to leave any tool in engine compartment.... including rechet set on the crank. :LOL: I had this wierd noise, THARRRRRRRRRRRR, at over 1500 RPM :yikes: good thing it was a premium tool. Hewww.
my impression on this work was very satisfactory. engine does idle and revs smoother. but for some others, it was critical. check this thread out. PICS it was a timebomb set to go off. this is another reason you should do this with expert. cheers, |
wow.....nice write up paul...
jay |
awesome!
Looks like I'll be busy next weekend.. :D |
thanks, Jay. :)
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Thanks for the write-up. I'm planning on doing this too.
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