Compression Check ( my NSX )
by
, 18-12-2015 at 12:32 PM (3210 Views)
As part of my annual service, I always take engine compression.
I kept doing this on my NSX every year since I bought it new in 1994 and as I changed the equipment, different altitude, etc over the years, can't do direct comparison of the absolute figures but at least, I know the condition of each cyl.
Silicone compound is doing good job in preventing any further rust on the rear bank IG coils for many years.
I have new rear set as spare as well as used complete F & R set for misfire diagnosis purpose but so far, these original ones are surviving very well.
The rubber seal at the IG coil cover is still very healthy thanks to the silicone compound so just keep re-using it until the next Eng Refresh.
No flashover markings on the IG coil tube or at the insulator body of the spark plug.
Just the usual corona arching marking with no rust so very good.
They covered about 47K miles so I think I’ll replace them at the next oil change.
Burning nicely and evenly.
I need replacing this air cleaner element/filter this time.......
I should have another delivery from Japan today or Monday......
I normally won’t show the full data of the compression check that was taken from other owner’s NSX but since this is mine, no problem showing it.
[psi]
#1: 230, #2: 237, #3: 235,
#4: 230, #5: 235, #6: 235
I’m quite sure if I place the engine on the dyno, it would show small amount of loss of output but still, really pleased with the standard compression figure over the last 21 years.
Not bad for more than 150K miles engine over 21years and I already inspected my camshaft, journals, crankshaft, metal, etc long time ago and happy with them so just keep driving.
Kaz