Compression test results

[A.T]

I did a compression test on my 03 Cobra with 10k miles on a reman motor tonight since Ford f'ed up a warranty job on the freeze plug and overheated since they didn't bleed the cooling system properly (also said they replaced the freeze plug that leaks and never did it).
1 - 170
2 - 174
3 - 165
4 - 160
5 - 155
6 - 154
7 - 154
8 - 160

Doesn't it seem low for a reman motor that just hit 10k?

Then I checked my friends 03 Cobra with 161k that is sitting at my house waiting to get shipped to Sarasota, FL since he relocated. His was between 165 and 175.

 

[01Jes]

I'd call it good.

 

[ctgreddy]

It's a little low but not enough to really worry about. My motor with 85k had between 150-160 psi on all. Ideally I would have liked to see 165-175 on all of yours but it's not low enough to worry about.

 

[04cobrawhine]

Don't forget ford says they want all cylinders within 15% of each other, and not really a number. I'd say it looks good as well.

 

[Bdubbs]

Don't forget ford says they want all cylinders within 15% of each other, and not really a number. I'd say it looks good as well.

Yup this is what I've heard too.

 

[LT1Squirrel]

Multiple things come in to play as well, like thread seal, oil weight/viscosity, humidity, etc... as long as they're within a range they're good

 

[big dad]

I concur with everyone else. I don't see a problem with those numbers.