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Rocker adjustment screws
https://www.ausmini.com/forums/viewtopic.php?f=5&t=81257		 Page 1 of 1
Author:  spfh84 [ Sat Apr 27, 2013 10:35 pm ]
Post subject:  Rocker adjustment screws
Hi all,

Just a quick one, adjusted the roller rockers today and the adjuster screws are screwed nearly all the way into the rocker...i.e. most of it is sticking out of the bottom. Is this an issue? Still had enough screw to tighten the retaining nuts, but only just!!

cheers
Author:  Lillee [ Sun Apr 28, 2013 7:27 pm ]
Post subject: 
Small or big bore? Is it happening to just one or all of them?

Do you have spacers under the rocker posts? If you do, you may need to remove the spacers which will give you correct height (or visa versa, can't remember to be honest).

The correct angle of the rockers should be slightly raised on the valve end when the valve is closed. From what it sounds, it's far too low at the front and when fully open may be passed the correct angle where the roller is no longer centred on the valve tip, esp if you have a high lift cam.
Author:  spfh84 [ Sun Apr 28, 2013 7:34 pm ]
Post subject: 
It's a big bore and the rockers are 1.5 high lift roller rockers. No spacers fitted. has me (once again) stumped. can't see any other way of adjusting the rockers without machining a bit off the posts...
Author:  drmini in aust [ Sun Apr 28, 2013 8:49 pm ]
Post subject: 
What brand are the rockers...?
Some have more adjustment than others.
Author:  spfh84 [ Sun Apr 28, 2013 9:24 pm ]
Post subject: 
they're minispares 1.5 high lift roller rockers!
Author:  drmini in aust [ Sun Apr 28, 2013 10:20 pm ]
Post subject: 
I'd say your cam has been reground by a lot, which has reduced its base circle diameter & dropped the pushrods lower.
To get more threads, decking the head a bit more would help.
Author:  spfh84 [ Sun Apr 28, 2013 11:07 pm ]
Post subject: 
the cam is also new though, did they make different length pushrods?
Author:  drmini in aust [ Mon Apr 29, 2013 8:07 am ]
Post subject: 
spfh84 wrote:
the cam is also new though, did they make different length pushrods?

There are 2 lengths: 850-998-1098, and 1275 which are about 3/8" longer.
I doubt you have the short ones, in a 1275...

The Minispares 1.5 roller rockers have a standard size 5/16" adjuster screw as used on Cooper S forged, also the late A+ style sintered rockers (1976 on).
However the rockers & adjusters fitted are not made in UK now, perhaps they are slightly shorter than originals.
I recently swapped a full set out, because all 8 were bent from new. :evil:
Author:  Lillee [ Mon Apr 29, 2013 10:04 am ]
Post subject: 
If your pushrods are too short they will almost hit the hole in the head itself?

Post some pics of it, that might help

EDIT: here's what mine looked like with 1.3's . Take note of the angle of the rockers when closed. If yours is pointing too far down at the front (or up for that matter) then something is not right and it may foul either the head, the rocker cover or both

Image
Author:  drmini in aust [ Mon Apr 29, 2013 4:09 pm ]
Post subject: 
Lillee those are Minisport ones- do you have a pic of the Minispares 1.5s you have on it now?
Author:  Lillee [ Mon Apr 29, 2013 4:22 pm ]
Post subject: 
drmini in aust wrote:
Lillee those are Minisport ones- do you have a pic of the Minispares 1.5s you have on it now?


I do but they aren't static images. Looks exactly the same angle wise... except purple

Image
Author:  drmini in aust [ Mon Apr 29, 2013 4:25 pm ]
Post subject: 
OK I was just checking the adjuster spare thread length, seems plenty on yours.
Maybe he does have smallbore pushrods in it then... :?
Author:  Lillee [ Mon Apr 29, 2013 4:41 pm ]
Post subject: 
drmini in aust wrote:
OK I was just checking the adjuster spare thread length, seems plenty on yours.
Maybe he does have smallbore pushrods in it then... :?


Quite possible. PM me I have a whole brand new set of 1275 pushrods if you need some
Author:  spfh84 [ Tue Apr 30, 2013 8:11 pm ]
Post subject: 
thanks for all the reply's! Turns out the engine had the wrong pushrods!

Lillee wrote:
Quite possible. PM me I have a whole brand new set of 1275 pushrods if you need some


Thanks for the offer but managed to source some before I saw your message!
Author:  Lillee [ Tue Apr 30, 2013 9:30 pm ]
Post subject: 
spfh84 wrote:
thanks for all the reply's! Turns out the engine had the wrong pushrods!

Lillee wrote:
Quite possible. PM me I have a whole brand new set of 1275 pushrods if you need some


Thanks for the offer but managed to source some before I saw your message!


glad you sorted it out!
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