Valve Clearances

[mattymc]

Ok, all clearances checked. I need to replace all of them, but all by roughly the same amount so I guess everything is wearing evenly. Most of the shims I need are 185 and 195, but I need a 188 and a 192 shim as well, do these size shims exist? If not what would be the best size to go for?

Thanks

Matt

[Dmac]

Hi Matt,
188 and 192 do exist and can be ordered from honda no problem, I think they are about £3.00 each

188 is actually 1.875 and 192 is 1.925 , they just round the size thats printed on the shim.

Can you get away with swapping some of the shims about so you don't have to buy as many?

I would go on the larger clearance side, So that as the valves recede into the head the clearances will still be good.

So if it is say .13 +/- 3, this gives you .10 to .16, so I would aim for .13 to .15 so they will stay in adjustment longer and not burn out.

Just keep a good note of what shim goes where and recheck after you change the shims as it is easy to make a mistake. Also make sure the valve timing is spot on as the cams will turn slightly as you tighten the caps down - check and double check

[Dmac]

Ok, if I was to end up with a measurement like 194 in terms of a shim size, what would be better, a 195 or a 190 shim?
Matt

Assuming for the inlet valves,
If 194 gives you the base clearance, +/- .03mm then a 192 (1.925) will give you base clearance plus .015 so 192 gives you .145 just where you want to be, on the looser side of the tolerance.

[mattymc]

Thanks for the help guys, I really appreciate it. Going to order all my shims from Honda tomorrow

Matt

[mattymc]

55 quid for 8 shims! I wasn't expecting that! Ordered the two odd sized ones from honda and getting the rest from eBay, less than 30 quid in total.

[Sppete]

Phew!
But at least you checked them and found out for yourself they needed doing it could have been a lot more cash later on if you hadn't
Fancey doing mine now you've had a little practice?
Pete