MA10 valve clearances

[davidb]

I have done this in the past a few times on various cars.
I have attempted twice on the K10, and both times after setting and running the car, it sounds like 'a skeleton having a w*nk in a biscuit tin'. Rechecking the clearances shows that some are out by 5mm - 10mm. Obviously, this is well over the 0.25 on the inlet and 0.30mm on the exhaust sides.

I'm getting TDC on cylinder 1 by gauging the the height of the piston with a screwdriver carefully slotted in the spark plug hole, and also by the cut out on the crank pulley to the '0' degree marking. Also getting TDC on cylinder 4 by rotating the crank 180 degrees to the opposite of TDC on #1 (and also doing the screwdriver trick).

I'm not sure how this is possible, and I reckon I'm doing something wrong, and maybe following a setup diagram that is incorrect.

Does anyone have a diagram that is correct or any instructions? Thanks.

 

[Enuo]

a skeleton having a w*nk in a biscuit tin

My sides!

 

[taupe_oyster7]

You want to do it in firing order which is 1342 so start with cylinder one on tdc, rocking between exhaust stroke and inlet stroke then move on to cylinder 3 and so on... Finishing with 2...


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[taupe_oyster7]

Also the skeleton thing was ****ing funny!!


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[Cookie]

...sounds like 'a skeleton having a w*nk in a biscuit tin...

LMAO!

Haynes says warm engine up and...

 

[davidb]

Thanks you very much for that! Can I be cheeky and ask for the timing marks on the crankshaft? Just want to make sure!
Thanks!
(Is there a workshop manual pdf anywhere online?)

 

[davidb]

Tried this again twice this weekend - same outcome. Set correctly, and then ran the engine, it tapped like crazy and all the clearances were out.
What am I doing wrong? I've done this loads of times previously on other cars!

 

[davidb]

Realised what was wrong - to get the full '4 stroke' thing on all four cylinders, the cranks needs to be rotated twice.
So getting #4 at TDC, you need to rotate the crank 360 degrees (until the white notch mark lines up with 0 degrees on the crank). Rotating the crank rotates the camshaft 180 degrees. I've sorted this now - it still taps though - do they all do this?

 

[frank]

are you using feelers david ? because you might have some wear on the rockers eh
i usually count the turn angles on the adjuster instead (2 flats on the locking nut on kart engines for example)

 

[davidb]

Yes, but also a spark plug gauge as I find it's difficult to get a 'blade' between the gap (due to height of surrounding head/rockers, etc).
I'll do it again this weekend - there was definitely wear on it though, you could tell. Can you buy new sets of these btw? (rockers and tappets?)

 

[frank]

you could grind the wear steps off, but its not really worth it, you can get tools that adjust them by angle or just angle it by eye

 

[davidb]

I set the valves to 0.22 on the inlet and 0.27 on the exhaust and it now runs lovely with absolutely no tapping!! Thanks all!