Compression for 1600 xflow

[uberfrog]

Gentlemen,

I need your advise again. What is supposed to be the compression on a 1600 ford kent xflow engine with 100 hp, when we did the leakdown and compression test we found 130 for 3 cylinder and 100 for the fourth one.
I read on some English thread that the normal compression is 170 for the kent xflow, is it the case?

Thank you all.

N6

[Doug Liedblad]

Did you pull the head off yet?

[GWise]

Make sure you take compression readings after warming up engine, with all spark plugs out, freshly charged battery, and (most important) the throttle wide open.

130 is low. It should be in the range of 160-180.

Your leakdown test should have told you where you're losing it from.

[uberfrog]

Did you pull the head off yet?

hi Doug
no I didn't yet since the car is running fine otherwise, and I am using it I just don't go over 4500rpm but for sure we know something is wrong. I forgot to mention the engine has a blow by, last month on the freeway driving at 7000 rpm I heard a big puff and speed went from 80 to 60 miles in a split second, I thought I melted the engine but then staying at 4000 rpm no problem.
when I got home I checked the engine and sure enough the oil dipstick was sticking out hence the blow by diagnostic.
We have the redo the compression anyway since it was not done as mentioned on this forum

[uberfrog]

Make sure you take compression readings after warming up engine, with all spark plugs out, freshly charged battery, and (most important) the throttle wide open.

130 is low. It should be in the range of 160-180.

Your leakdown test should have told you where you're losing it from.

Thank you for the help and we will redo the compression test using your info this time.

best,

n6