compression question??
#1
Honda-Tech Member
Thread Starter
Join Date: Nov 2003
Location: Maumee, OH, US
Posts: 551
Likes: 0
Received 0 Likes
on
0 Posts
compression question??
I had a bad miss shift the other day and the engine reved to god knows how high. Everyone said that I may have bent my valves and I should check the compression. So I did and it came back 175, 165, 175, 180 psi. My helms gives a minimum of 135psi with a maximum variation of 28 psi. I am assuming that this means that it can be higher. And that the maximum variation is the bigest variation between cylenders and not the highest the compression can be (135+28 163psi). and that my readings are good and I bent no vavles is this correct???
#2
Honda-Tech Member
Re: compression question?? (bgoetz)
Retake your test and see what you get.
Man thing you want to worry about is numbers dropping out of the pattern by 10.... like your number 2 is doing.
I never heard of you should have 135psi.... i would think thats way to low. All ive seen and believe are good is a avg. of 180psi. Do it again and see what you get.
Man thing you want to worry about is numbers dropping out of the pattern by 10.... like your number 2 is doing.
I never heard of you should have 135psi.... i would think thats way to low. All ive seen and believe are good is a avg. of 180psi. Do it again and see what you get.
#3
Honda-Tech Member
Thread Starter
Join Date: Nov 2003
Location: Maumee, OH, US
Posts: 551
Likes: 0
Received 0 Likes
on
0 Posts
Re: compression question?? (Luserkid)
I have never done a compression test before # 2 was kind of weird and made a loud chirp. It kind of freaked me out so I don't think I cranked it as much as the rest. I will do it again this time I will be sure to crank it the same is there any specific # of cranks???
#4
Honda-Tech Member
Join Date: Jul 2003
Location: Houston, Tx
Posts: 501
Likes: 0
Received 0 Likes
on
0 Posts
Re: compression question?? (bgoetz)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bgoetz »</TD></TR><TR><TD CLASS="quote">I had a bad miss shift the other day and the engine reved to god knows how high. Everyone said that I may have bent my valves and I should check the compression. So I did and it came back 175, 165, 175, 180 psi. My helms gives a minimum of 135psi with a maximum variation of 28 psi. I am assuming that this means that it can be higher. And that the maximum variation is the bigest variation between cylenders and not the highest the compression can be (135+28 163psi). and that my readings are good and I bent no vavles is this correct???</TD></TR></TABLE>
Minimum = 135 psi (you passed)
Maximum variation = 28 psi (you passed) 180-165= 15 psi, i personally think that maximum should be around 10-15
So it is within "specs". Depends on engine (compression ratio) what the "avg" should be like your engine is putting out 165-180 but other engines such as the b-series put 200+ .
Minimum = 135 psi (you passed)
Maximum variation = 28 psi (you passed) 180-165= 15 psi, i personally think that maximum should be around 10-15
So it is within "specs". Depends on engine (compression ratio) what the "avg" should be like your engine is putting out 165-180 but other engines such as the b-series put 200+ .
#5
Honda-Tech Member
Re: compression question?? (bgoetz)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bgoetz »</TD></TR><TR><TD CLASS="quote">I have never done a compression test before # 2 was kind of weird and made a loud chirp. It kind of freaked me out so I don't think I cranked it as much as the rest. I will do it again this time I will be sure to crank it the same is there any specific # of cranks???</TD></TR></TABLE>
You should turn the car over atleast 3 times, after that the compression should stay where it is.
You should turn the car over atleast 3 times, after that the compression should stay where it is.
Thread
Thread Starter
Forum
Replies
Last Post