01-05-2017, 02:36 PM
(01-05-2017, 02:13 AM)SimiPair_imp Wrote: I measured the cranking cylinder pressures for cylinders 1 and 4. They were 195 psi and 180 psi respectively. This confirms that cylinders 1 & 4 close their intake valves at different points.
I'm still getting used to this forum "thing", so sorry if I don't quote correctly.
From a previous post:
this is a misprint in the shop manual, happens all the time with a non procedure specs.if this was a service check procedure red flags would have flown very early from feedback from service engineering and field service techs.i'm sure it will be corrected by next shop manual printing if Honda knows about it.
correct spec should read-
intake timing for cyl #1 and#4 opens at 5 degrees atdc, closes 28 degrees abdc
intake timing for cylinders #2 and #3 opens 5 degrees atdc, closed 38 degrees abdc
Paul. Sr.Tech. Specialist, American Honda Motor Co.Inc= Retired.
correct spec should read-
intake timing for cyl #1 and#4 opens at 5 degrees atdc, closes 28 degrees abdc
intake timing for cylinders #2 and #3 opens 5 degrees atdc, closed 38 degrees abdc
Paul. Sr.Tech. Specialist, American Honda Motor Co.Inc= Retired.
[/quote]
Thank you Sr. Tech
38 would lower dynamic compression - reduced temperature...
I think that is your answer right there.
As far as the compression test. I am a little suspicious of something you might have done - not being confrontational about it or something, just there's so much that could be slightly different and give you that 5% difference...
A leak down test would have a lot fewer places to go wrong, for example...