302 cylinder compression PSI
03-02-2010, 10:58 PM
#12
Senior Member
if i read what u said correct the timeing shouldnt... cuz if ur turning the engine over its still makeing a full revolution to measure psi... in my head it makes sense
03-02-2010, 11:06 PM
#14
Senior Member
Thread Starter
Join Date: Jul 2008
Location: Long Beach Calimexifornia
Posts: 58,557
Received 1,162 Likes
on
647 Posts
id try it dry but i doubt that little of fuel would push it up and i was once told 300-6 r high comp. engines i dont have the slightest clue.... i got an idea
EVERYONE POST YOUR COMPRSSION READS ON HERE SO WE ALL HAVE SOMETHING TO GO OFF OF and ur year, mileage, and motor
EVERYONE POST YOUR COMPRSSION READS ON HERE SO WE ALL HAVE SOMETHING TO GO OFF OF and ur year, mileage, and motor
Last edited by ymeski56; 03-02-2010 at 11:10 PM.
03-02-2010, 11:17 PM
#16
Senior Member
Thread Starter
Join Date: Jul 2008
Location: Long Beach Calimexifornia
Posts: 58,557
Received 1,162 Likes
on
647 Posts
So 178-182 psi w/ no significant bleed down is in the ballpark. Gauge is probably accurate (should have been, it was right out of the box, but for the same reason, I wasn't sure). You had 185 on a cylinder, now I'm jealous.
06-15-2012, 11:26 PM
#17
Member
Join Date: Jun 2012
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
Just bought a 1990 w/ a 302 5.0L, 134,000 miles. In this order:
REAR
4 8
3 7
2 6
1 5
FRONT
1 -- Dry: 175 Wet: (Didn't bother)
2 -- Dry: 172 Wet: 175
3 -- Dry: 145 Wet: 155
4 -- Dry: 170 Wet: 167 (?)
5 -- Dry: 175 Wet: 180
6 -- Dry: 175 Wet: 180
7 -- Dry: 182 Wet: 185
8 -- Dry: 182 Wet: 182
My truck cranks with "push button" so the fuel pump was off. I poured a little motor oil in each cylinder for the wet test but it probably could have used a little more. Cylinder 4's reading seems off and 3 probably leaks.
REAR
4 8
3 7
2 6
1 5
FRONT
1 -- Dry: 175 Wet: (Didn't bother)
2 -- Dry: 172 Wet: 175
3 -- Dry: 145 Wet: 155
4 -- Dry: 170 Wet: 167 (?)
5 -- Dry: 175 Wet: 180
6 -- Dry: 175 Wet: 180
7 -- Dry: 182 Wet: 185
8 -- Dry: 182 Wet: 182
My truck cranks with "push button" so the fuel pump was off. I poured a little motor oil in each cylinder for the wet test but it probably could have used a little more. Cylinder 4's reading seems off and 3 probably leaks.
