Big Valve clearance causing tapping/ticking noise???

[James Sileross]

So I’ve just bought a forged 4efte engine for a starlet glanza, used, finally got it in and mapped running fine.

I’ve noticed it’s got a ticking/ tappety noise on idle seems to disappear as soon as even the slightest bit of throttle is given. The tap doesn’t increase with rpm

Now I’m looking at my valve clearance and the exhausts are a tad loose average of 0.05-0.1 accross all of them (not one is within spec which should be 0.3 +\- 0.03) most reading 0.35-0.4mm

Intakes are closer to spec but a little bit tight if anything so I’m thinking exhaust side may be causing my issue.

My question would be, is this little amount over likely to cause any sort of noise? Before I go down the road of taking the cams out and rectifying it for it not to be the issue?

Thanks in advance for any replies

[E-bmw]

In your position, I would be eliminating the known fault first before going any further anyway, at least then you will know 100%.

In answer to your question, yes it could be the issue.

[PaulKemp]

Hydraulic or fixed shim type?
If hydraulic then they are not pumping up, if ship buckets then you do want them in tolerance preferably the middle of tolerance

[SystemOfAFrown]

Does it reduce as the engine warms up? Could be piston slap.

[Evoluzione]

James Sileross said:

The tap doesn’t increase with rpm

Really?

[Pete54]

If the sound does not change i.e match the increase in revs (albeit at half the rate) then it is unlikely to be the valve clearances. That might well point to more serious issues such as piston slap.

As other posters have said - sort the valve clearances and eliminate that possibility. Then possibly things either go well or need further examination.

[steveo3002]

tappets move in time with the engine ,,,if the noise doesnt change with engine speed its not that