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12R valve clearances ?

Tech Talk for Ford, Mazda, Daihatsu & Makes that currently dont have a home.

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12R valve clearances ?

Post by TX4000 »

anyone know the hot/cold valve clearances for a 12R :)

Cheers.
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Post by rocknferoza »

Try the yota section
James
94 cxi feroza- coiled rear!!! SOLD !!!!!
05 s/cab 5L-e hilux- bring on the mods
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Post by elgordomuygrande »

TX,

Valve clearing (hot):

Intake: 0.20 mm / 0.0079 inch

Exhaust: 0.36 mm / 0.0142 inch

Cheers,
Ron
smokin' is bad, especially for your curtains

----------------------------------------------------------
F20 Resin Top, 2.5" lift , 31" Grabber AT's
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Joined: Mon Sep 13, 2004 8:37 pm

Post by TX4000 »

Ahh thanks, good man.

has a bit of an uneven idle/rev and the head was just whacked back on after a headgasket blowout by the previous owner.

Cheers.
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Post by Area54 »

rocknferoza wrote:Try the yota section


Everyone seems so tense and twitchy trigger fingers to enforce the new forum rules...


TECH:

The 12R Toyota motor was fitted to Daihatsu F20s.
Built, not bought.
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Post by TX4000 »

you get that :) I have done the rockers, seems ok.. changed the plugs and leads as well. I guess it seems underpowered after driving my VL. but idles like a diesel sorta.. tho I think the exhaust is leaking somewhere, I need a set of extractors, would tidy it up, it always did have a tick kind of exhaust noise with it..
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Post by elgordomuygrande »

Guess you already checked timing? Mine also idles quite like a diesel, even with new sparkies. After changing idle revs it runs a little better, but it's still far from a smooth idle. Did you pressuretest the exhaust? tho I dont think that's the problem. What's the ideas on the extractors? I have thought about it myself, what to do with the intake, since it is attached to the exhaust manifold. How much power could you get out of the motor?? even thought about turboing it...

Still not sure whether I'd stick to the 12r with al the goodies or swapping it for a 3y.

Cheers,
Ron
smokin' is bad, especially for your curtains

----------------------------------------------------------
F20 Resin Top, 2.5" lift , 31" Grabber AT's
Posts: 77
Joined: Mon Sep 13, 2004 8:37 pm

Post by TX4000 »

Yeah the 12R isn't much of a motor to "soup" up, just looked @ the Dellow belhousing conversion case price again :) would be nice to get an 18R in.. there has been 2 complete 18Rs dumped @ my local dump in old Coronas, carb/alt/hoses etc.. *sigh*.. you normally unbolt the inlet from outlet manifolds (they should be sealed) and the extractors are usually made to fit under stock manifolds.. the pipe has dogey joins on my F20 so I'm sure it leaks (towards rear of vehicle) TURBO !! noooo... would kill the old girl.. I was reading the 18R block can accept the twincam head ? would be interesting.
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Post by Area54 »

You can get the 18R-G motor that is fitted with the twin cam head - factory, also had side draft carbies.

My old 12R had a decent cam (but can't remember the specs), match ported head, extractors and free flow exhaust, nice note, but def no stump puller.
Built, not bought.
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