Valvetrain help...? June 27, 2007, 11:21:40 PM Alright, I think I've got it right.Is my 88 5.0 XR7 a solid roller?Now, bare with me, this is my first ford.The valvetrain is unadjustable.I can't get a straight answer on how to reassemble my valvetrain... Quote Selected
Valvetrain help...? Reply #2 – June 27, 2007, 11:49:39 PM Quote from: CougarSE;157284Hydraulic Roller.Well, I'll be... Any idea on the re-assembly? Quote Selected
Valvetrain help...? Reply #4 – June 27, 2007, 11:50:44 PM Quote from: CougarSE;157288Just put it together...No worrying about where the cam center is and shiznit? Quote Selected
Valvetrain help...? Reply #5 – June 28, 2007, 12:10:08 AM no, because when you put the cam gear on you will have to align the dots with the cam and crank gear. Quote Selected
Valvetrain help...? Reply #6 – June 28, 2007, 12:29:04 AM Quote from: 32VFoxBird;157295no, because when you put the cam gear on you will have to align the dots with the cam and crank gear.The cam gear isn't off, I'm talking about reassembling the heads.I took the heads off...I'm talking about the unability to adjust the lash.I was told I need to make sure the cam is on the centerline (valve closed) for what ever cylinder I'm dealing with. Then some go and tell me that I don't need to..Someone shine some light please. Quote Selected
Valvetrain help...? Reply #7 – June 28, 2007, 07:31:34 AM The procedure you are taking about is for adjustable rockers... IF the timing chain/cam hasn't been replaced, just bolt it back together... Quote Selected
Valvetrain help...? Reply #8 – June 28, 2007, 12:11:09 PM Quote from: TurboCoupe50;157313The procedure you are taking about is for adjustable rockers... IF the timing chain/cam hasn't been replaced, just bolt it back together...How am I suppose to get an accurate torque reading when bolting on the rockers if they have to press down the spring(opening the valve)?I don't know if you know what I am referring to...Since the cams position would have the valve open if it was all together, the pushrod would be out further pushing onto the rocker and opening the valve.So when I bolt on the rocker I would have to fight the spring.Unless, I am overthinking this and the spring wouldn't change my torque readings... Quote Selected
Valvetrain help...? Reply #9 – June 28, 2007, 02:53:25 PM You are overthinking this. Just torque the rocker bolts to correct torque spec. Check you engine manual for the torque spec, because I don't remember it. Quote Selected
Valvetrain help...? Reply #10 – June 28, 2007, 03:04:24 PM Rotate the engine so that each pair of rockers you are working has the valves at rest... Quote Selected
Valvetrain help...? Reply #11 – June 28, 2007, 06:17:39 PM you dont have to set the rockers at zero lash with pedestal ones. you just bolt them on and torque them to around 25ft/lbs. Quote Selected
Valvetrain help...? Reply #12 – June 28, 2007, 09:03:47 PM Quote from: CougarSE;157378Rotate the engine so that each pair of rockers you are working has the valves at rest...Thank you, that is what I was looking forward to getting clarified. Quote Selected
Valvetrain help...? Reply #13 – June 29, 2007, 10:11:55 AM You can go to all that trouble, but 25lbs torque on the pedestal mtg bolt is 25lbs... Makes no difference where the cam is in it's rotation... Yes it will open the valve if it's on a intake or exhaust cycle, no big deal on non adj rockers... Quote Selected
Valvetrain help...? Reply #14 – July 04, 2007, 08:42:27 PM WHOA! If a guy asks then ... answer. First off the lifters are hydraulic rollers. Now, are you putting the same heads pushrods etc. back in? If so then.... Turn the crank to TDC #1 ( that's 0 degrees on the dampener with the distributer rotor pointing at the #1position) From this point torque your#1 intake & exhaust,#7 int., #5 exh.,#8 int. & #4 exh. Then, rotate the the crank 1 full revolution, and torque the#5 int,#2 exh., #4 int. exh.. Now rotate the crank another 90 degrees & torque the #2 & #3 int. , & the #7 & #3 exh. This is for the stock SO engine firing order, NOT THE H.O.! Now one more thing, that you will not need if you are using all of the original parts, or the stock length pushrods, THERE ARE shim kits available that raise the seat of your fulcrums ( what your rockers sit on) particularly with roller rockers. These can be used in addition to or instead of different length pushrods. Good luck, and just be certain you are at TDC on the intake stroke #1 ( and 1 revolution out- hence check where your distributor's rotor is pointing! better be the #1! ) If you're running the H.O. firing order let me know and I'll getcha the torquing order for it. LATER! Quote Selected
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