View Full Version : eng. compression
woodman1
08-22-2010, 07:24 PM
Does anyone out there know what the compression on a 2.25 with a 7:1 head?
bachelier
11-10-2013, 12:41 PM
145 lbs
I've done my reading dry and wet.
I'm not shure if it's a 7 or 8:1. I think it's a late 7:1.
The results:
#1: 135/160
#2: 135/150
#3: 123/165
#4: 137/ 160
Is there someone who can comment on my results?
SafeAirOne
11-10-2013, 02:07 PM
From the WSM:
http://farm8.staticflickr.com/7417/10784363745_c300630fc3_b.jpg
Billy5
11-10-2013, 07:24 PM
There should be an 8 stamped on the head if its 8-1. It appears that two things are going on. The first is a possible head gasket failure between the cylinder ( # 3 is quite a bit lower than the rest) and two, the rings are failing, thats why your compression jumps up so much during the wet test. I do believe.
Revtor
11-10-2013, 08:52 PM
You may have an inconsistency but those #'s seem pretty good for a 40 yr old engine.
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