valve clearance on corsa

P

pointer333

New member
Hi all just got my corsa out today after a view years in my shed  and checked valve clearance are they the same as rgs ex -25 and in -2 ?.  If so my readings are ex 1 = .17  2= .17  3= .17   in 1= .22  2= .2  3= .17 . I think they need adjustment ? thanks Bob.    
 
Bob

As I understand it, yes they are the same.

If I'm wrong then the post will accelerate in numbers quicker than a well tunes SFC......................

A good source of data is JLO's site (laverda nutter not curvaceous singer) http://www.laverdamania.net/

I just did mine and checked the valve timing was out on the inlet,, did it after reading the following thread
http://laverdaforum.com/forum/index.php/topic,81567.0.html

Steven
 
fix them soon and check your center carb. if the center INLET valve is so close, you might have that pot running a bit lean. Check clearance again after 1000 km again and see if the gap has closed up again. if so, you will need a new valve.
 
  Your full of good news Lothar. Only likely to burn an exhaust valve through a tight clearance, may be lucky and find they have never been done, in which case the bearing locations will all be nice and fresh and the job will be straight forward.


    Keith.
 
laverdakeith said:
  Your full of good news Lothar. Only likely to burn an exhaust valve through a tight clearance, may be lucky and find they have never been done, in which case the bearing locations will all be nice and fresh and the job will be straight forward.


    Keith.
Click to expand...

Now, THAT'S wishfull thinking, innit Keith?? :D

Had something like that a while ago, engine looked pristine from the outside, ran sort of OK but sounded terrible, ended up with a FULL overhaul of ALL the major bits!

I've seen burnt inlet valves, but the adjacent exhaust valve was also burnt!

piet
 
Thanks for your help done my working out today inlet 1 and 2 are 0.22 but 3 is 0.17 so will it be ok to surface grind .o5 off to make it the same as 1&2. on the ex side they are all the same 0.17 so will need to grind off. 08 which will than make them 0.25mm. can anyone tell me if that is ok to do ?. thanks.
 
Measure all the shims and you may be lucky in that a few may be perfect for other valves. Saves grinding down all the shims.
Just make sure they are faced flat duriing grinding.
 
... and check their thickness to be in a range between 1,60 and 2,30. If they are already below 1,60, you should start putting some money aside. Hope it's not the case though...  ;)
 
My shims measure with mic inlet 1=2.69 2=2.72 3=2.62  ex 1=2.77 2=2.74 3=2.77. so with what has been said i will be ok to go ahead and grind them. well my mate will i hope?. I know its going to be s--t job!. I mite make him a pot to put them!. I also noticed that the middle rubber carb to head is a bite perished  but no holes thank god mite need to look for a replacement? any ideas. thanks again Bob.    ps will let you know how i get on. cheers. 
 
Nice big shims, be sure to grind them square. Or better still just purchase the correct replacements, avoid pattern shims from Motalia I have seen a goodly number of them with a raised pip on the inside face...


  Keith.
 
yeah - sounds like a very healthy head!  ;)

If the rubber starts to perish, try to get 3 (!!) replacements. Why 3? Cause they might not be 100% the same size as your currently installed ones and different lengths are a no-go here. Also if the one perishes, the other ones will soon follow. And lean mixture due to an air-leak is no good...
 
You must log in or register to reply here.
Back
Top