Booming sound from the air intake?

Just had the valves and seats reground and a broken valve guide replaced on a 2.5NA. put everything back together - started fine and sounded smooth, but 2 injectors were weeping. Forgot the small metal seals on the injectors and so took them back off and fitted the seals. Started it up and a pulsing sound like a bucket being kicked hard is coming from the air intake. Engine idles ok - Any ideas?

I's probably justthe normal intake noise you just haven't noticed it before.

Air intakes are VERY noisy.

The pipes and filter are there also as inlet air SILENCERS.

CharlesY

Check for a fox stuck in the box...BOOM BOOM!! Am i showing my age??

storm99 said:

Check for a fox stuck in the box...BOOM BOOM!! Am i showing my age??

Click to expand...

Yes you are.

you might have found bin laden playing with semtex

Whats the difference between a suicide bomber and bazzle brush?

The bomber only goes boom once!








Ill get me coat

for me, sounds like a noise coming from the valves. maybe you should check again the adjustments/leaks (could be an exhaust valve which doesn't close properly)

costin said:

for me, sounds like a noise coming from the valves. maybe you should check again the adjustments/leaks (could be an exhaust valve which doesn't close properly)

Click to expand...

If the compression is OK, don't bother.

Intakes are VERY noisy.

CharlesY

Checked the valves - one rocker was way out - must have missed it in sequence. was only opening for a fraction of the cycle - :doh: Sounds fine and runs like a dream now.

Also check if one(or more) of the valve-caps are not dislodged.