I wouldn't say warm or cold is so critical ..but how long since it last ran.
if a year ago ..
then you want it running some, then test.
if it ran yesterday ...cold is ok.
warm would generally be better.

mainly you want oil on and behind the rings .
Since it spends themost time running warm ... a warm test makes more
sense to me.

I suppose a cold test might make any tendency toward low compression so
up more.

scott
On 6/1/2013 10:25 PM, Dan Andrews wrote:
> Compression is tested cold Todd
>
> Sent from my iPhone
>
> On 02/06/2013, at 3:00 PM, Todd Last <Rubatoguy@COMCAST.NET> wrote:
>
>> What is the consensus on taking a compression test? With the engine cold
>> or warm?
>>
>> Todd
>> '88 Westy