Shims for GS550ET 1980 (UK) Urgent

[ukjules]

Hi I am in the UK and need shims to finish off
a head rebuild.

I want 2 down from 2.15 - ie. 2.10 and 2.05

Anyone help ?
I can swap some if you want too ?

I am in the UK

 

[cornishgs]

Do you want 2 x2.05

 

[ukjules]

I want 1 * 2.10 or 1* 2.05
If they make them or one has had them made ?

do you have the size ?

 

[cornishgs]

Do you want 2 x2.05 the thinnest you can fit are 2.15.

You will have to machine off the end of valve stem abit to get back in normal range with shims.

 

[ukjules]

No probs - i am gonna risk it then - run for bit and hope that the gap will expand
and it was 0.002.

I have not time to mess about further.
either it works or dies.

 

[Agemax]

the gap will not expand, as things wear in the gap always gets smaller

 

[cornishgs]

the thinnest they make are 2.15

I think if its just for one valve and you have re fitted head I would grind one shim one down by attaching a valve grinding sucker to a 2,15 shim and putting valve grinding sucker tool in electric drill and take 0ff 0.05 by holding against emery cloth keeping it square .unless some one can suggest better way?

Maybe try machining a bit from inside tappet holder underneath? think I have seen some one do it on here some where.

 

[ukjules]

i meant get smaller ...
I like the idea of grinding the shim ..... damned good thinking il add that to the list.

I wonder if my friendly machine company could do it ? the one that did the head ?
can they or any human being grind down a disk flat ?

 

[cornishgs]

yes some machine shop could hopefully help you, good luck

 

[ukjules]

apparently there is a shim vlub on here.
i cant ever post a question on it.
all i want is a shim ?

how do you post in shim club on here ? other do i seem to be prevented ?

 

[cornishgs]

ive got some 215 if you want some but none thinner leave your address in my profle messages and I will post you a couple

 

[tom203]

yes some machine shop could hopefully help you, good luck

A machine shop with a surface grinder with magnetic chuck could do it- but the shims need to be demagnetised afterwards - simple stuff.
the shim club is run by member ghostgs1 - send him PM, not sure if he can send your way

 

[ukjules]

thanks for all the advice on here.
I have calmed down and put down the sledge hammer.

I never measured the valves when putting them back in.

I used (possibly stupidly) not the valves from my original head but one of the
other i bought.
I dont know where the issue is but everything was done correctly and i see no reason
for the shim issue.

I wil try machine shop tomorrow, then if that dont work swap the buckets about (i have many spares) and if needed off with the head
again and compare the valve with other i have now for backup.
if that fails to show up anything valve to machine shop.

thanlks anyway but how bloody annoying. i was going for a spin tomororw to the coast ............

 

[ukjules]

I just wondered as i might have a go at grinding down a shim myself.

how long would it take with a drill onto sandpaper ?

shims are made of hard steel are they not ?

 

[hampshirehog]

I just wondered as i might have a go at grinding down a shim myself.

how long would it take with a drill onto sandpaper ?

shims are made of hard steel are they not ?

It'll take forever - been there, tried that.....

 

[ukjules]

just returned from garage - i agree - i wont continue myself and see if a machinist can do it.

 

[ukjules]

Ill keep on this tread for all Shim topics .....

As you know all valves set ok but one using my .003 gauge is too small.
smaller than 0.003.

so i designed - possibly madly - you guys can tell me, to use a uk 2p coin
and measure with it only for stats.

2p coins by my guage = 1.8mm
Gap now with coin is 0.14 (way out of spec - max is .08mm)

the shim i was using measures 2.1 on my guage (his must be 2.15 however as that is the lowest gs one availible)
gap - as we know zeroed out - 0.003 wont go in.

a) can you guys measure a 2pence for me ? so i can be sure.
b) I need a shim 191 - 1.86 (with my measuring of the 2p) (not allowed or in service limits) ? is my calculation right ?

I cant work out what is going on here ? the head is skimmed , all the others are fine.
One thing I must know - the exact thickness of a 2p coin - all other measurements by me are exact.

thanks

 

[hampshirehog]

I measured,using a digital caliper gauge, 3 x 2p coins and got 1.82, 2.00 and 2.07.

 

[JTGS850GL]

Be very careful. There is a reason that Suzuki limited the available shims to 2.15. Getting much thinner and you could risk interference with the shim bucket.

 

[ukjules]

I have ended up using a local engineering firm who have a shim grinding machine.
they did it while i waited.
they inform me the shim is hard all the way through.
I have to take the risk.

the 2p with their measurement was 1.803mm (my was 1.8mm)

i needed a 1.9 - 1.95 shim. I got them to cut down 2 shims from 2.55.

I agree it is a risk but i have absolutely no option ! i cannot take the head off again and start
looking at the valve - too much work at this stage. another time maybe.
cost me a few quid only.

Valves now set perfectly - but agreed with one shim that might worry me forever.

If i did it correctly how would i work out the amount off the valve head ?