compression results?

jameys18 · 09-10-2009, 12:21 PM

Hey guys, looking at buying a replacement 4agze. I found someone that has one, complete with trans etc... He did a compression test on it, but i don't know what the numbers mean... is this good?

cyl1: 175
cyl2: 175
cyl3: 197
cyl4: 200

does this indicate it has good compression and the engine is probably good?

traintech86 · 09-10-2009, 01:40 PM

i think i read about someone doing a test and someone else comented on it saying that anything lower then 170 is bad. take it with a grain of salt tho and hopefuly someone will give you a for sure answer.

Jackstand Queen · 09-10-2009, 02:22 PM

Those are good numbers.

The only negative is that the numbers aren't all closer together.

But then compression tests are somewhat variable. If the engine is cold, or warm, and if oil in added to the cylinders through the spark plug hole: can all drastically affect the readings.

Overall, sounds like a viable engine.

traintech86 · 09-10-2009, 02:26 PM

well if he tested 1, 2, 3,4 then then engine would have been warmer for the later right?

muffinman · 09-10-2009, 03:19 PM

Quote:

Originally Posted by traintech86

well if he tested 1, 2, 3,4 then then engine would have been warmer for the later right?

NO. it should be tested warm but if it's tested cold it won't warm up for the last 2 cylinders.

traintech86 · 09-10-2009, 07:39 PM

oh ok thanks for the info.

jameys18 · 09-10-2009, 11:31 PM

thanks guys, i got the engine/trans shipped to my door for 1300. it should be here on monday and depending on other parts i plan on putting it in later next week. please take a look at my other thread titled something like 4agze to JDM 4agze swap questions.

I have a few than need fast correct answers if im going to get this thing in and everything else ordered

09-10-2009, 12:21 PM	#1 (permalink)
jameys18 No Skills Join Date: Jan 2009 Posts: 34 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	compression results? Hey guys, looking at buying a replacement 4agze. I found someone that has one, complete with trans etc... He did a compression test on it, but i don't know what the numbers mean... is this good? cyl1: 175 cyl2: 175 cyl3: 197 cyl4: 200 does this indicate it has good compression and the engine is probably good?

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09-10-2009, 01:40 PM	#2 (permalink)
traintech86 Cage Fighter Join Date: May 2009 Location: Yokosuka, Kanagawa Japan Posts: 1,799 Thanks: 27 Thanked 47 Times in 43 Posts My Google Map iTrader Rating: (3/100% )	i think i read about someone doing a test and someone else comented on it saying that anything lower then 170 is bad. take it with a grain of salt tho and hopefuly someone will give you a for sure answer.

09-10-2009, 02:22 PM	#3 (permalink)
Jackstand Queen Cage Fighter Join Date: May 2008 Posts: 840 Thanks: 75 Thanked 64 Times in 60 Posts iTrader Rating: (1/100% )	Those are good numbers. The only negative is that the numbers aren't all closer together. But then compression tests are somewhat variable. If the engine is cold, or warm, and if oil in added to the cylinders through the spark plug hole: can all drastically affect the readings. Overall, sounds like a viable engine.

09-10-2009, 02:26 PM	#4 (permalink)
traintech86 Cage Fighter Join Date: May 2009 Location: Yokosuka, Kanagawa Japan Posts: 1,799 Thanks: 27 Thanked 47 Times in 43 Posts My Google Map iTrader Rating: (3/100% )	well if he tested 1, 2, 3,4 then then engine would have been warmer for the later right?

09-10-2009, 07:39 PM	#6 (permalink)
traintech86 Cage Fighter Join Date: May 2009 Location: Yokosuka, Kanagawa Japan Posts: 1,799 Thanks: 27 Thanked 47 Times in 43 Posts My Google Map iTrader Rating: (3/100% )	oh ok thanks for the info.

09-10-2009, 11:31 PM	#7 (permalink)
jameys18 No Skills Join Date: Jan 2009 Posts: 34 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	thanks guys, i got the engine/trans shipped to my door for 1300. it should be here on monday and depending on other parts i plan on putting it in later next week. please take a look at my other thread titled something like 4agze to JDM 4agze swap questions. I have a few than need fast correct answers if im going to get this thing in and everything else ordered