Your Truck Source

Your Truck Source


 
RULES  HomeHome  PortalPortal  CalendarCalendar  FAQFAQ  RegisterRegister  Log inLog in  
Have you told all your friends about the excitement here at MyTruckSource.com?
Have a new ride you want to show off? Or you want to see our other members rides? Check out our PRIDE & JOY Forum!

Share | 
 

 Compression Test

Go down 
AuthorMessage
fordman68
Valued Member
Valued Member
avatar

Posts : 115

Age : 25
Location : illinois

PostSubject: Compression Test   February 20th 2010, 6:32 pm

I just did a compression test on my 1988 302 and got this cyl1=150psi cyl2=156psi cyl3=150psi cyl4=160psi cyl5=150psi cyl6=160psi cyl7=150psi cyl8=150psi is that good or bad?
Back to top Go down
fordman68
Valued Member
Valued Member
avatar

Posts : 115

Age : 25
Location : illinois

PostSubject: Re: Compression Test   February 20th 2010, 6:38 pm

oops i meant, cyl1=150 cyl2=150 cyl3=150 cyl4=150 cyl5=150 cyl6=160 cyl7=160 cyl8=150
Back to top Go down
johnboggs21
Almost Addicted Member
Almost Addicted Member
avatar

Posts : 1171

Age : 26
Location : Michigan

PostSubject: Re: Compression Test   February 20th 2010, 6:40 pm

ya kno ya can edit ur posts....lol
Back to top Go down
fordman68
Valued Member
Valued Member
avatar

Posts : 115

Age : 25
Location : illinois

PostSubject: Re: Compression Test   February 20th 2010, 6:48 pm

ya but was quicker to just put it there lol
Back to top Go down
In2Trux
Moderator
Moderator
avatar

Posts : 1381

Age : 56
Location : North Bay Ont, Canada

PostSubject: Re: Compression Test   February 20th 2010, 9:08 pm

fordman68 wrote:
I just did a compression test on my 1988 302 and got this, is that good or bad?

The actual number you get in P.S.I. is not your end result. There are too many variables such as wear, valve train specs and overall engine condition. Two engines of the same type may give very different readings.

A average reading of 155 psi sounds like it's in the acceptable, down right Good for an engine of that age. .

If all of your psi readings are within 10% of each other, it's considered a good result.
The test is meant to tell you whether a cylinder is leaking or having other troubles as compared to other cylinders.

During your test.. Was the gauge pressure dropping significantly while you were reading the gauge?

================================================
Glenn
*****************************************************
Has anybody noticed? Common Sents is Really NOT that Common.
THERE IS NO STOP SIGNS ON A MERGE LANE!!!
*****************************************************
07 Silverado 2500HD CCSB DMax (Daily Driver)
05 Volvo V70R (Totaled by an Impaired Driver)
57 Chevy Panel Van (project)
57 Mack B61 (for sale)
87 Chevy Kodiak Tilt N Load (SOLD Aug 03/10)
Back to top Go down
fordman68
Valued Member
Valued Member
avatar

Posts : 115

Age : 25
Location : illinois

PostSubject: Re: Compression Test   February 20th 2010, 11:04 pm

no after 3 cranks it was at its max and it held there until i let the pressure off
Back to top Go down
merlin5577
Admin
Admin
avatar

Posts : 2938

Age : 33
Location : Taunton, MA

PostSubject: Re: Compression Test   February 21st 2010, 9:14 pm

In2Trux wrote:
If all of your psi readings are within 10% of each other, it's considered a good result.
The test is meant to tell you whether a cylinder is leaking or having other troubles as compared to other cylinders.

Exactly. As long as the readings are close to each other, that means the engine is wearing evenly. If one cylinder is much higher or much lower, you have a problem. Yours look good Fordman68.

================================================
-Robert.
My Fleet;

2011 Volkswagen Jetta TDI 2.0L 6A
2010 Chevrolet Malibu LT 2.4L 6A
2003 Chevrolet Silverado LS 6.6L 5A
1997 GMC Suburban SLT 5.7L 4A


"If you dont stand behind our troops, feel free to stand in front of them."

New Idea
Back to top Go down
fordman68
Valued Member
Valued Member
avatar

Posts : 115

Age : 25
Location : illinois

PostSubject: Re: Compression Test   February 22nd 2010, 9:46 pm

im starting to think that i have a slow head leak instead of a blown gasket and that it is building pressure after being ran for a while but im not sure
Back to top Go down
Jared Olson for SO IL
Valued Member
Valued Member
avatar

Posts : 376

Age : 25
Location : Campbell Hill, IL

PostSubject: Re: Compression Test   February 27th 2010, 11:55 am

why is this in Farm equipment KP? lol btw happy bday.
Back to top Go down
johnboggs21
Almost Addicted Member
Almost Addicted Member
avatar

Posts : 1171

Age : 26
Location : Michigan

PostSubject: Re: Compression Test   February 27th 2010, 1:18 pm

Jared Olson for SO IL wrote:
why is this in Farm equipment KP? lol btw happy bday.

i was wondering that myself lol
Back to top Go down
fordman68
Valued Member
Valued Member
avatar

Posts : 115

Age : 25
Location : illinois

PostSubject: Re: Compression Test   February 27th 2010, 5:05 pm

me 2 idk how and or why its in farm equipment And thanks for the Happy Bday
Back to top Go down
merlin5577
Admin
Admin
avatar

Posts : 2938

Age : 33
Location : Taunton, MA

PostSubject: Re: Compression Test   February 27th 2010, 7:09 pm

Moved to the 'Ford Motors' section.

================================================
-Robert.
My Fleet;

2011 Volkswagen Jetta TDI 2.0L 6A
2010 Chevrolet Malibu LT 2.4L 6A
2003 Chevrolet Silverado LS 6.6L 5A
1997 GMC Suburban SLT 5.7L 4A


"If you dont stand behind our troops, feel free to stand in front of them."

New Idea
Back to top Go down
fordman68
Valued Member
Valued Member
avatar

Posts : 115

Age : 25
Location : illinois

PostSubject: Re: Compression Test   February 28th 2010, 12:03 am

merlin5577 wrote:
Moved to the 'Ford Motors' section.
Thanks LOL.
Back to top Go down
Sponsored content




PostSubject: Re: Compression Test   

Back to top Go down
 
Compression Test
Back to top 
Page 1 of 1
 Similar topics
-
» Briggs 12HP Compression Leak?
» Kid born to be a sports star? Take genetic test.
» Where to test a new GPX5000
» Kiteworld test on the Fluid ATV
» Virginity Test Kit

Permissions in this forum:You cannot reply to topics in this forum
Your Truck Source :: Trucks :: Ford Motors-
Jump to: