2002 Citroen Saxo - Clicking / tapping noise from inlet manifold

Question

I have a clicking / tapping noise coming from the inlet manifold on my 2002 Citroen Saxo VTR (1.6 8v)

I have manually adjusted the valve clearances (see this video to hear what the engine sounded like before the valve clearance adjustment) however there is a clicking noise which seems to be coming from the inlet manifold from behind the engine.

You can hear the clicking noise in this video. When holding the idle actuator valve I believe I can feel it moving/vibrating at the same speed as the clicking sound.

I unplugged the idle actuator valve and ran the car for a few seconds however there was still the clicking noise. I have read some posts on Saxo forums which mention a similar sound, saying it could be the injectors.

william reeder · Answer

That could be injector box i.if it was lifter it would get louder more gas you give it.valve would have more solid tap .look for a sensor around middle of motor see if it has the one controls fast idle . sounds like that silonode for fast idle on cold start might be running all time .Not for certain but I've heard that before ? hope you find it ?good luck .

Answered by william reeder on January 7, 2021

user42808 · Answer

do a compression test, two cylinders may be the culprit. if they are sharing combustion it will sound a lot like a valve ticking but really its a small amount of the explosion leaking into the adjacent cylinder. they should hold the compression steady, if one of the cylinders doesnt hold steady thats an issue that will become worse.

Answered by user42808 on January 7, 2021

2002 Citroen Saxo - Clicking / tapping noise from inlet manifold

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