cylinder compression

1980-1986 Datsun 720 forums. All 720-specific topics and discussion can be found here.
synack7350
Posts: 364
Joined: Sun Jan 09, 2011 3:08 pm
Car: nissan '83 720 king cab pickup 2wd 2.4L Z24
Location: Boaz, AL

Post

Hi all its been a while school has been nuts and made getting anything done nearly impossible. today I checked cylinder compression as my trucks been running a little rough with all the commuting I've been doing.
1) 80 psi
2)190 psi
3)130 psi
4)140 psi

obviously the head gasket is gone aroun cyl 1, but I'm curious why the pressure in cyl 2 would be so high? I expected since its a well worn engine (over 200k) that cyl pressures would fall 130 - 150 assuming everything was functioning. I actually expected closer to 130. Any ideas fellers?


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