a cure for clankety clank!??? Tuesday, 25-Apr-2000 20:26:21 152.163.195.186 writes: i just fired up my 1835 motor with all my new mods to it..including dual 44 webers..well with just the merged header on and no exhaust it sounded great..well i bolt on the hideaway muffler and now its about twenty times quieter..im starting to think too quiet with that muff ..but i can hear clankety..you know like the valves are loose..so i figure maybe since the engine is seating they loosend up..waited next day for them to cool to reajust..go thru the ritual and they arent really any differant..i was expecting one to be way off..so im really studying these things and ive come to the conclusion by watching while i turn the motor over that my pushrods are hitting the tubes..i can see that they have the lip even bent up at the end some..i have a set of CB original 1.25.1 rockers with swivel feet on it..and a Engle 110 cam...nothing real radical.and i went thru all kinds of articles on getting the valve train geometry right so im almost positve i got it right.but that has to be what that noise is..i know on the stock rockers where the pushrod goes is more towards the end so they woulnt hit, but i just shelled out a 100 bucks for these others and i really want the so called extra power they give..my pushrods are the Bugpack hi performance type..are they to big..do thay make a smaller diameter pushrod? how can i fix this noise? this noise is driving me crazy..i know just switch the rockers right? but theres gotta be a way..thank you.. Mike

Message thread:

a cure for clankety clank!??? (Mike) (25-Apr-2000 20:26:21)

Did you cut the top of the guides down so that the retainers dont hit the guides??? (n/t) (beetlejuice) (25-Apr-2000 21:33:48)

Re: Did you cut the top of the guides down so that the retainers dont hit the guides??? (Mike) (25-Apr-2000 22:01:58)

Probably don't need to worry about retainer to guide clearance with an Engle 110 (Bruce Tweddle) (25-Apr-2000 22:07:52)

Re: Probably don't need to worry about retainer to guide clearance with an Engle 110 (Mike >KLAZBUG) (25-Apr-2000 22:56:05)

That's what my neighbour thought too. Unfortunately it wasn't so. I don't remember which retainers he was using. 100 miles later it wasn't a pretty sight! (n/t) (beetlejuice) (26-Apr-2000 13:26:26)

Re: a cure for clankety clank!??? (Dave H Aka Nor-Cal) (25-Apr-2000 22:09:57)

Re: Re: a cure for clankety clank!??? (mike) (25-Apr-2000 22:58:25)

Is it safe to set the lash tighter to reduce the noise? (Jason M.) (26-Apr-2000 00:44:38)

If you run chromolly pushrods, you can. I have mine set at .003 cold, and my car has been on some long road trips.....they don't expand like aluminum does. I know some guys who set them at even less! (n/t) (John Pagnanelli) (26-Apr-2000 01:10:52)

Re : I set mine at a tight zero lash. just enough to let the pushrod roll. (n/t) (Mark Reilly) (26-Apr-2000 03:51:19)

The engine expands faster than cromo pushrods, so zero lash is fine. Just make sure you set them at zero on a cold day, otherwise you will hold the valves open until the engine warms up. Or set them at about .002" on an average day. (n/t) (Ed) (26-Apr-2000 07:13:56)

Check your rocker arm side play. I had some noise even when adjusted to .006" intake and exhaust. The side clearance was at like .020. Most people set it to .010 I think. (n/t) (Steve Arndt) (26-Apr-2000 14:17:54)

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Re: Did you cut the top of the guides down so that the retainers dont hit the guides??? Tuesday, 25-Apr-2000 22:01:58 152.163.194.206 writes: no i didnt cut the guides or the bosses down. i never new i was supposed to..i have just the single high performance springs..but turning the motor over by hand and all the time setting up the valve geometry i never noticed them touching or even being close to.i noticed the pushrods were close but i guess when they are flinging along that fast they move enough to slap off the tops of the tubes.. i can physically see that the puchrods are hitting on the tops of the tubes it doesnt look like they hit much but enough to make them tap like crazy.. Mike

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Probably don't need to worry about retainer to guide clearance with an Engle 110

Tuesday, 25-Apr-2000 22:07:52

207.102.98.188 writes:

Take your rocker shafts off and pushrods out, and use the big end of a 3/8" extension to pry some clearance in the tubes. That's what I was able to do.

Bruce Tweddle

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Re: Probably don't need to worry about retainer to guide clearance with an Engle 110 Tuesday, 25-Apr-2000 22:56:05 205.188.199.29 writes: wow there are so many differant factors on this.. Bruce im going to give your cure a shot and hope it works out ..they arent hitting much so hopefully i can get a little out of the tubes..but im also gonna check my clearance when hot to see what it changes to.. will try to get it apart tommorow night in between watching my three year old and see what happens..thanks all Mike >KLAZBUG

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Re: a cure for clankety clank!??? Tuesday, 25-Apr-2000 22:09:57 63.23.17.187 writes: Mike, Are these Bugpack's Chromolly Pushrods Bugpack Pt#'s 4053-10,11,12,13,14, Or Bugpack part #'s 4081, 4082, 4084? If so here's the dealio. These are either Steel or Chromolly. These pushrods will not expand like the stock Aluminum ones ( I know because I have # 4053-14 in my 65'). What happens is the cylinders & head stretch more than the pushrods and they make a hell of a racket. I discovered this by setting my lash settings to zero at cold. I then started my car up and drove it around the block. i then took off the valve cover and used a feeler gauge and discovered that I now had .025" of clearance!!! Once it was cold the lash was where I originally set it at. So the bottom line here is either live with it or I believe that there some heavy duty alumninum ones made by I think Autocraft. My 2 engines that Enginemasters of Sonoma are buinding are using his custom made (Type-4 center to Type-1 ends) Pushrod tubes with his 3/8" ball to 1/2" in the middle back to 3/8" ball pushrods that he makes for his engines. Hope this helps, Dave. Dave H Aka Nor-Cal

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forgot to mention i do have the 4081 pushrods..thank you

mike

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Is it safe to set the lash tighter to reduce the noise?

Wednesday, 26-Apr-2000 00:44:38

24.25.227.132 writes:

Would it be safe to set the lash cold to .002 to reduce the valve train noise since they will open up a few thousandths when hot?

Jason M.

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