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compression readings

Posted By sc63uni 13 Years Ago
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sc63uni
Posted 13 Years Ago
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Hitting on all eight cylinders

Hitting on all eight cylinders (16 reputation)Hitting on all eight cylinders (16 reputation)Hitting on all eight cylinders (16 reputation)Hitting on all eight cylinders (16 reputation)Hitting on all eight cylinders (16 reputation)Hitting on all eight cylinders (16 reputation)Hitting on all eight cylinders (16 reputation)Hitting on all eight cylinders (16 reputation)Hitting on all eight cylinders (16 reputation)

Group: Forum Members
Last Active: 10 Years Ago
Posts: 16, Visits: 55
compression readings from #1 and 2 and 5-8-were 200-202-200-195-200-197. did not check 3 and 4 as they are kind of a pain to get to and my starter sounds as if it is going out. it is usually not a problem as i only have to bump it to start the truck, but it was having trouble with the 5 or so cranks req for test and after seeing other readings i kinda assumed....

i  also recalled the guy that had the motor said " it tested pretty even at around 195"  seemed high at the time so i did nt really trust his test but when i got about the same thing... maybe so

anyway i was trying to detemine if i should rebuild heads( i have an extra set and kinda assumed the ones on engine would not have hardened seats and condition probably questionable) i have a slight knock on upper end of driverside. you can feel it on the valve cover but not on head or block. Passenger side sounds fine. rocker assembly looks ok and after i adjusted  valves, the knock went away.... til i revved it..... then came right back.

 i was checking compression to see if it would tell me if lower end of motor was in good enough condition to go to expense of head rebuild ( if thats possible)  and i was curious anyway to what they may read.

any body have any input or suggestions for other tests? do those compression readings seem normal? high? good?

thank you for any feedback 


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Forum Post compression readings By sc63uni ( 13 Years Ago )
Forum Post Those numbers look good to me, my shop manual tells that you would be... By lovefordgalaxie ( 13 Years Ago )
Forum Post thanks for the speedy reply. Ill look at that this morning By sc63uni ( 13 Years Ago )
Forum Post Uni: You didn't say what heads & so on you have. Those readings are... By PF Arcand ( 13 Years Ago )
Forum Post You asked "i was checking compression to see if it would tell me if... By Pete 55Tbird ( 13 Years Ago )
Forum Post My 292with no more than 10 k miles has a 190 reading +-5 on all 8... By lovefordgalaxie ( 13 Years Ago )
Forum Post Thanks guys. I cant remember where to look to find casting numbers on... By sc63uni ( 13 Years Ago )
Forum Post Yes, looks like it can be a worn rocker.
A worn rocker will have...
By lovefordgalaxie ( 13 Years Ago )
Forum Post a little more background, This motor was an ebay $500 find that i put... By sc63uni ( 13 Years Ago )
Forum Post what is "excessive play" rocker to shaft? if i pull rocker assembly am... By sc63uni ( 13 Years Ago )
Forum Post Check this article by the late Walt Knuckles. Using his method allows... By MoonShadow ( 13 Years Ago )
Forum Post Well, excessive play needs to be measured and the lash between the... By lovefordgalaxie ( 13 Years Ago )
Forum Post Thanks guys . ill give ole walts method a try in the morning. if the... By sc63uni ( 13 Years Ago )
Forum Post Using Walts method you dont have to see or feel a gap. Chuck By MoonShadow ( 13 Years Ago )
Forum Post If you twist the pushrod as you tighten the screws to 0 lash, you can... By Hoosier Hurricane ( 13 Years Ago )
Forum Post thanks guys. decided to leave the mattress tags on after i saw video... By sc63uni ( 13 Years Ago )
Forum Post Its really quite easy. Do you know which rocker is noisy? You can find... By MoonShadow ( 13 Years Ago )
Forum Post just remember at that high a readings you may have to go with a higher... By Y block Billy ( 13 Years Ago )
Forum Post thanks again Chuck and i found Walts method not only an easier method... By sc63uni ( 13 Years Ago )
Forum Post It would be a good idea to set the other side too. Y-block solid... By MoonShadow ( 13 Years Ago )
Forum Post Is the valve cover bent or distorted? I wouldn't think you would feel... By Hoosier Hurricane ( 13 Years Ago )


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