Do you perform a compression test on a warm or cold engine and why?
O Old Crow Petty Officer 2nd Class Joined Aug 1, 2005 Messages 104 Dec 29, 2006 #1 Do you perform a compression test on a warm or cold engine and why?
Kajun37 Petty Officer 1st Class Joined Feb 17, 2006 Messages 348 Dec 29, 2006 #2 Re: Compression testing warm is preferred....i'm not exactly sure why but it prob has to do with metal heat expansion when warm and contraction when cold.
Re: Compression testing warm is preferred....i'm not exactly sure why but it prob has to do with metal heat expansion when warm and contraction when cold.
N neilp53 Recruit Joined Dec 9, 2006 Messages 5 Jan 1, 2007 #3 Re: Compression testing Do not forget that the throttle plates, should be set to fully open position, In order to let the maximum amount of air in to the cylinders.
Re: Compression testing Do not forget that the throttle plates, should be set to fully open position, In order to let the maximum amount of air in to the cylinders.
B BoatBuoy Rear Admiral Joined May 29, 2004 Messages 4,856 Jan 1, 2007 #4 Re: Compression testing Doesn't make a whole lot of difference. What you're after is the difference between cylinders, not absolute pressure. Difference should be no more than 10%.
Re: Compression testing Doesn't make a whole lot of difference. What you're after is the difference between cylinders, not absolute pressure. Difference should be no more than 10%.
