NG engine knock

[TonyEscobedo]

Wrong plugs perhaps?? Too long? Maybe slightly tapping piston



On Jun 9, 2012, at 8:57 PM, Huw Powell <audi at humanspeakers.com> wrote:

> Define "new NG engine" first?
> 
> On 6/9/2012 8:34 PM, Bill Green wrote:
>> Just put a new NG engine into my 4kq. Using the starter to turn it over
>> resulted in a knock noise very much like a big end rod bearing was shot on
>> one or more of the cylinders. I took all the plugs out then reinstalled a
>> single plug in the cylinders one at a time turning the engine over each
>> time. I thought that would show me which cylinder was making the noise. But
>> they each sounded completely normal when I did this! Then I discovered that
>> putting any two plugs in resulted in the knock noise returning! This is 10-1
>> compression engine could that noise be normal? I'm afraid to try and start
>> this engine until I get past this problem. By the way rotating the crank
>> through a complete cycle with the plugs out is very smooth with nothing
>> striking anything. Any thoughts??? I don't want to re-pull this engine if I
>> don't have to! J
>> 
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