Checking cylinders with screw driver for knocking/pining.

[fost9508]

I appologize for this dumb question, but as you know or will find out I am new to engine work. I used a screw driver to listen to a few of the cylinders on my stang and when I stick the screw driver directly on the block above the cylinder next to the injector don't hear anything that concerns me. When I put the screwdriver near or on the injector inlet I hear clicking. At first I was alarmed, but then thought for a second and figured maybe the clicking was the injector opening and closing to allow fuel in to the chamber. Right, wrong????? Edumacate me!!!

Thanks again.

 

[Lynx331]

yes that clicking your hearing is the injector opening and closing, if you put the screwdriver on the valve cover also you can listen to valve train noises

 

[fost9508]

This will probably be impossible to explain but what noises should I watch out for on the valve cover? Also, if my engine was pining would I definetly know it?

Thanks for the response.

fost9508

 

[HISSIN50]

i would worry if you dont hear injectors clicking.

you can hear valve clatter - sounds like a light tapping.

detonation would be heard under load (usually higher rpms in higher gears or lugging in higher gears). people say it sounds like marbles in a jar - that is pretty accurate. high pitched and nasty noise. timing, octane and CR all play into detonation (vs preignition which is different).

good luck.