I have done leakdown tests on a few cars. However what kind of numbers should i expect on an h22a. Meaning what % of leakdown is considered good for this engine. I already did a compression test and all were over 200psi with alittle more variation than i would have liked

 

Variation could be your procedure, throttle wide open, watch the very first compression stroke, this checks rings, then do a run of about 5 or 6 strokes, watch the needle jump each time and stop at the same number of strokes, actually its hard to stop at the right time so take your reading on stroke 6, some guys stoke it till the gauge stops climbing, this is not correct. If the very first stroke seems low then try to start over again, the piston may have already been on the compression stroke and only gave a partial stroke. Post results, leakdown numbers are opinionated also, as is the time allowed to leakdown.

 

I'd say around 5%, but as with a compression test consistency is important too.

 

Are you talking about a compression test? A leakdown test is not performed like this.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Duane_in_Japan &raquo;</TD></TR><TR><TD CLASS="quote">Variation could be your procedure, throttle wide open, watch the very first compression stroke, this checks rings, then do a run of about 5 or 6 strokes, watch the needle jump each time and stop at the same number of strokes, actually its hard to stop at the right time so take your reading on stroke 6, some guys stoke it till the gauge stops climbing, this is not correct. If the very first stroke seems low then try to start over again, the piston may have already been on the compression stroke and only gave a partial stroke. Post results, leakdown numbers are opinionated also, as is the time allowed to leakdown.</TD></TR></TABLE>

 

I'd agree. On my track car, the leakdown numbers are 2%, 1%, 2%, 4%, going from #1 to #4 with 100PSI input pressure. I'm not sure why #4 is so far off from the others. I'd say anything 5% or thereabouts on a street car is fine. I've tested some S2000s that have no measureable leak at all!

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rosko &raquo;</TD></TR><TR><TD CLASS="quote">I'd say around 5%, but as with a compression test consistency is important too.</TD></TR></TABLE>

 

Yes, a compression test, I have both testers but hardly ever use the leak down tester, JDM engines over here have low milage as you might have heard and rarely need a leak down test, mostly just on broken timing belts, driven by Americans.

 

A leakdown test is generally more informative than a compression test. I've seen some JDM engines that I'd never install on my car. Regardless of mileage, any H22 (JDM or USDM) is still going to be at least 7 years old, and most are much older.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Duane_in_japan &raquo;</TD></TR><TR><TD CLASS="quote">mostly just on broken timing belts, driven by Americans.</TD></TR></TABLE>

lol, i'm offended. nice

 

Military folks buy cars for a low price and they do not take care of them because when they go back to the states, more than likely, the car will just get thrown away. Many Honda gets a broken timing belt and bent valves, now the owner has to buy a whole car for a couple of thousand instead of changing the belt when scheduled for several hundred. Dont be offended, Japanese just dont drive their cars past 80K Kms. (normally)

 

^ He is correcto.

 

Doostur, if I get this new job I applied for I may be down in your neck of the woods on a weekly basis, what is your DEROS.