w100 compression numbers
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Registered User
Joined: Feb 2011
Posts: 10
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w100 compression numbers
I have a 1975 dodge w 100 with a 360 and it ran fine for 2 days then yesterday and i checked my oil and it was creamy like when you blow a head gasket. But i also notice that i had that that wrong intake manifold gasket it was to to big and my dad does thing it was the head gasket so i did a compression test on it and i go
#1: 95pis
#3:100psi
#5:100psi
#7:100psi
#2:110psi
#4:115psi
#6:120psi
#8:115psi
So my question is do i have a blown head gasket? And are my compression number good enough?
#1: 95pis
#3:100psi
#5:100psi
#7:100psi
#2:110psi
#4:115psi
#6:120psi
#8:115psi
So my question is do i have a blown head gasket? And are my compression number good enough?
Legend
Joined: Jun 2009
Posts: 8,025
Likes: 72
From: orangeville ontario
the compression on the that engine are low. that 95 is below the 100psi that most manuals recommend and there is about more than a 10% variance in compression. i would assume this is a dry test. did you try doing a wet test(put a bit of oil in each cylinder and then check compression). they should all go up. if one was to not go up then that where your head gasket may be broke.
Champion
Joined: Mar 2009
Posts: 2,639
Likes: 4
From: Bent Mountain Va
The compression is not good and sooner or later will require a rebuild. The wet test will help ID the problem with compression as to whether it is rings or valves. If you have the wrong intake gaskets I would remind you that there are water passages from the heads to the intake that are sealed by those gaskets.
