what numbers should i get on a bone stock non sh 2001 h22a4 motor when i do the compression test?

 

Dont worry so much about how high the numbers are...just that they are within 10% of each other.

 

i did it and they were all 200 so i guess im good to go

 

Is there are reason you did a compression test?

It's possible to have fine compression numbers, but still have an issue. You should also perform a leak down test to detect blow-by.

 

What Compression numbers should i expect of a H22a ??? Whats a leak down test how do u perform one ??

 

Your compress numbers shoul all be 180 PSI +. Most folks typically see about 225+ in the H22A4.

What you want to look for, just as importantly, is that you do not have number that signifcantly differ from cylinder to cylinder.

So, if you get 225 225 225 225 or 223 226 228 224, etc.... that's ok.

If you get 190 225 230 235.... then you know that you either screwed up the test procedure, or the cylidner with 190 has either bad rings or bad valve seals.

Now, it's possible to have good compression numbers, but suffer from a condition called blow-by.

Blow-by is when you have gases (exhaust) blowing by the rings or the valve seals. A leak down tester is used for this, and it is a dual guage air pressure manifold that you typically dial in the input to 100 PSI and then hook the output to the cylinder you are testing. You ensure that each cylinder is closed (cam lobes off the valve stems) and then pressurize the cylinder with the tester.

If both the incomming air pressure and the outgoing read the same... then you don't have any problems. It's more typically to see 100PSI / 97PSI, etc. It's usually not a flawless reading.

Honda indicates that 10% is acceptable. More than that and you've got problems.

Honestly, if you are seeing more than 5%... you've got some nice wear going on. In this case, you've got exhaust gases blowing by either your valve seals or piston rings.

It's important to listen for a hiss. You'll be able to hear where the air is escaping. The noise will be in the crank case for the rings, and at the head for the valves.

 

Whoa thats the most complete and best answer i ever got on any forum....u the man gerhard !!!!

On Compress numbers +/- 10 is acceptable ?
and +/- 5 on leak down test

thanks