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I have a constant knocking sound which seems to be coming from the top end if my 2006 1.6 petrol ford focus zetec. Can anyone recommend an additive (STP possibly) that might cure the problem before I have to take it to a garage? By the way, the noise only starts about 2 mins after engine start up.

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  • Cars & Trucks Master
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You need to get the valves adjusted before you damage them-stp is thick and ford doesn't recommend any oil additive-that may cause more problems than it helps-Denny

Posted on Nov 27, 2013

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SOURCE: engine turns over but will not start (1.6 ford focus zetec)

CRANK SENSOR

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SOURCE: engine started rattling

Have you enough oil in it?

Posted on Jan 21, 2009

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SOURCE: Loud engine knocking on 2001 Ford Focus

Sounds to me like a very common problem has occured to your neighbor. If this is a SOHC engine, one of the valve seats in the number 4 cylinder has fallen out. I'm sure it has damaged the head and the piston. Stop trying to run it or you might blow a hole in the cylinder wall or break a rod or both.

Posted on Aug 07, 2009

beduncan
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SOURCE: Ford focus zetec 1.6 auto, Misfiring and no power

It's normal for the cat to get hot - given they've replaced everything (just about) that could cause your problem - they have not looked at the injectors and O2 sensors. If you had something burning in the engine bay it was most likely electrical and you should look for burnt wires. You probably have a short in the ignition system or fuel injector wire harness. It's nearly impossible to diag a problem like this without having the car first hand. It must be throwing check engine light codes. Get the codes and post them. Also try a different shop at this point.

Posted on Aug 07, 2009

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SOURCE: knocking vvt pulley?

Variable Valve Timing

Posted on Nov 10, 2009

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My 2006 1.6 petrol ford focus zetec has a constant knocking sound coming from the engine which isn't there on start up but arrives around 2 minutes after, and stays until the engine cools down again! Any...


Aww, you may have a failed big end or crank bearing. With the engine hot and running, using a glove, remove each spark plug lead in turn and then replace it. If you hear the knocking decrease on one cylinder, that's the cause.

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There is no quick fix for this fault, the engine has to come out, so I hope it is something else, like a loose pulley on the crank nose, alternator, power steering pump, or A/C

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