Proof once again Nissan makes great motors
12-11-2004, 06:28 PM
#1
Proof once again Nissan makes great motors
I did a compression test on my car today after getting it running again (blew a fusible link for the ECU....so that wasn't getting power...hence the car wouldn't run). Anyway my car is an 86 2nd gen, 5-speed. This car has 210k miles on it. Most of you would probably scream having a car with that much mileage.....but for the condition the car is in....it can easily go another 210k miles.
To give an idea of the procedure I used. I relieve fuel pressure by removing the fuel pump fuse and running the car until it won't start anymore. Disconnected the main coil wire for the distributor. Removed one plug at a time and tested each cylinder, cranking the car a few seconds each time at WOT.
Anyway compression reads 195psi in every cylinder. No difference between cylinders and each cylinder was checked twice. FSM reads normal compression is about 173psi, with no difference larger than 14 psi per cylinder, with a minimum compression reading of 128psi.
So I figure I'd share this with everyone....and once again prove that Nissan builds great V6 motors that are practically bulletproof. I've never had one major problem with my car. I've had sensors go, fusible links blow out because of old age (my car is 18 years old....it can buy cigarettes!)...and I think that should make any Nissan owner that much more confident about thier car.
S
To give an idea of the procedure I used. I relieve fuel pressure by removing the fuel pump fuse and running the car until it won't start anymore. Disconnected the main coil wire for the distributor. Removed one plug at a time and tested each cylinder, cranking the car a few seconds each time at WOT.
Anyway compression reads 195psi in every cylinder. No difference between cylinders and each cylinder was checked twice. FSM reads normal compression is about 173psi, with no difference larger than 14 psi per cylinder, with a minimum compression reading of 128psi.
So I figure I'd share this with everyone....and once again prove that Nissan builds great V6 motors that are practically bulletproof. I've never had one major problem with my car. I've had sensors go, fusible links blow out because of old age (my car is 18 years old....it can buy cigarettes!)...and I think that should make any Nissan owner that much more confident about thier car.
S
12-11-2004, 07:32 PM
#4
Senior Member
Join Date: Jul 2002
Posts: 2,836
Originally Posted by maximase86
I did a compression test on my car today after getting it running again (blew a fusible link for the ECU....so that wasn't getting power...hence the car wouldn't run). Anyway my car is an 86 2nd gen, 5-speed. This car has 210k miles on it. Most of you would probably scream having a car with that much mileage.....but for the condition the car is in....it can easily go another 210k miles.
To give an idea of the procedure I used. I relieve fuel pressure by removing the fuel pump fuse and running the car until it won't start anymore. Disconnected the main coil wire for the distributor. Removed one plug at a time and tested each cylinder, cranking the car a few seconds each time at WOT.
Anyway compression reads 195psi in every cylinder. No difference between cylinders and each cylinder was checked twice. FSM reads normal compression is about 173psi, with no difference larger than 14 psi per cylinder, with a minimum compression reading of 128psi.
So I figure I'd share this with everyone....and once again prove that Nissan builds great V6 motors that are practically bulletproof. I've never had one major problem with my car. I've had sensors go, fusible links blow out because of old age (my car is 18 years old....it can buy cigarettes!)...and I think that should make any Nissan owner that much more confident about thier car.
S
To give an idea of the procedure I used. I relieve fuel pressure by removing the fuel pump fuse and running the car until it won't start anymore. Disconnected the main coil wire for the distributor. Removed one plug at a time and tested each cylinder, cranking the car a few seconds each time at WOT.
Anyway compression reads 195psi in every cylinder. No difference between cylinders and each cylinder was checked twice. FSM reads normal compression is about 173psi, with no difference larger than 14 psi per cylinder, with a minimum compression reading of 128psi.
So I figure I'd share this with everyone....and once again prove that Nissan builds great V6 motors that are practically bulletproof. I've never had one major problem with my car. I've had sensors go, fusible links blow out because of old age (my car is 18 years old....it can buy cigarettes!)...and I think that should make any Nissan owner that much more confident about thier car.
S
12-11-2004, 08:34 PM
#5
charliekilo3: Interesting you'd mention removing all the plugs....is that really neccessary? Not saying that it's wrong....but I'm curious how removing all the plugs affects the reading of one cylinder. Is removing all the plugs going some how make the readings higher/lower? I've done compression tests on my friend iansw's 4th gen. Once with all but the cylinder being tested in, and once with all the plugs out and the readings were pretty consistent (within 1-2psi of each other) between the two tests.
GoalieKeg: Werd! Your car looks good as well! Them AE style Cefiro look great! I've installed them on 2 cars, and love they way they look! In fact, there is one of the cars I did an installation on (iansw 97 S/C'ed GXE).
S
GoalieKeg: Werd! Your car looks good as well! Them AE style Cefiro look great! I've installed them on 2 cars, and love they way they look! In fact, there is one of the cars I did an installation on (iansw 97 S/C'ed GXE).
S
12-11-2004, 10:10 PM
#10
How does it strain the motor when cranking it? I mean based on that, wouldn't it just strain the car more when under normal starting because now you have all plugs in? Something isn't clicking in my head with that.
BTW Jeff, how's the baby doing?
S
BTW Jeff, how's the baby doing?
S
12-11-2004, 10:21 PM
#12
I get what your saying.....so basically its more of ease of turning of the motor really....it wouldn't really affect my readings correct?
Glad to hear the baby's fine. Wait until she's 2.....then what sanity you have will go away forever!!!!
Congrats again! I'm sure she'll turn out to be a great wrench turner for sure......just keep her away from Shawn, or else she'll learn how to break everything! haha!
S
Glad to hear the baby's fine. Wait until she's 2.....then what sanity you have will go away forever!!!!
Congrats again! I'm sure she'll turn out to be a great wrench turner for sure......just keep her away from Shawn, or else she'll learn how to break everything! haha!S
12-12-2004, 02:17 AM
#14
Senior Member
Join Date: Jun 2003
Location: NM
Posts: 2,153
WOW, I'm very impressed with Nissan motor. I had a good feeling about it since they do have strong motor. From what I hear from a lot of independent mechanics that they say they run good as 500k. I wanted to see a record.
12-12-2004, 10:17 AM
#18
Originally Posted by maximase86
I get what your saying.....so basically its more of ease of turning of the motor really....it wouldn't really affect my readings correct?
12-12-2004, 10:21 AM
#19
Senior Member
Join Date: Oct 2004
Posts: 137
Originally Posted by charliekilo3
Must not have been driven in the winter if it still has the original muffler.
lol my cat is burned through internaly..hehe
12-12-2004, 11:13 AM
#20
Originally Posted by spirilis
Readings shouldn't change, but the concern is the starter--Since doing a compression test requires using the starter much more in a short period of time than you typically use it, you might as well make it as easy as possible so the compression test doesn't add unnecessary wear to it. A similar argument could be made for oil lubrication... less load on the engine under such low-oil-pressure conditions should minimize the amount of bearing wear that occurs during those cranks.
12-12-2004, 02:23 PM
#21
Originally Posted by maximase86
GoalieKeg: Werd! Your car looks good as well! Them AE style Cefiro look great! I've installed them on 2 cars, and love they way they look! In fact, there is one of the cars I did an installation on (iansw 97 S/C'ed GXE).
S
Thanks. I love Ian's car! It's awesome....
12-13-2004, 04:27 PM
#24
Originally Posted by Rowan
That's great news! Thanks for sharing!
Go Nissan!
oh yeah, and by the way, Ian's car is just sick...go over to the FI forums...
Go Nissan!
oh yeah, and by the way, Ian's car is just sick...go over to the FI forums...
I help with a bunch of the wrench turning on the car. I remember the days he ran a V1 S/C S
12-13-2004, 08:24 PM
#33
Amazing. Thats good to know cause my block has hairline cracks in it. I'm gonna post a thread about that when I get pics. I'd like to have a spare around that I could slowly work on and build up. How much was shipping?
12-14-2004, 08:34 AM
#34
Wow how did you do that? Hydrolock? Did you get the block magnafluxed or something?
Originally Posted by Broaner
Amazing. Thats good to know cause my block has hairline cracks in it. I'm gonna post a thread about that when I get pics. I'd like to have a spare around that I could slowly work on and build up. How much was shipping?
12-14-2004, 09:03 AM
#35
I'll link when I get pics. No it hasn't hydrolocked. Everything is still intact and runs fine but I think it'll blow eventually. There are very short hairline cracks on the last 2" on the bottom of the block. Everything else appears to be fine. Its like the crank is unbalanced and causing stress. Maybe this is just what the casting looks like but I don't think so.
12-15-2004, 11:24 AM
#38
The link to the thread about the cracked block.
http://forums.maxima.org/showthread....38#post3482938
http://forums.maxima.org/showthread....38#post3482938
12-15-2004, 04:39 PM
#39
to get 195psi on all cycliders is pretty impressive. I've only done a compression test on like 3 random cars and their results weren't that good and horrible compared to your results. These cars didn't have any major engine problems, but were just tested for the hell of it.
You didn't have to Disconnected the main coil wire for the distributor. By taking out the fuel pump fuse you eliminated any change of the car running. You could have just Disconnected the main coil wire for the distributor, but would have still have fuel pouring into the compuston chamber. Taking the fuel pump out of the loop is best.
The procedure does call for all spark plugs to be out.
You didn't have to Disconnected the main coil wire for the distributor. By taking out the fuel pump fuse you eliminated any change of the car running. You could have just Disconnected the main coil wire for the distributor, but would have still have fuel pouring into the compuston chamber. Taking the fuel pump out of the loop is best.
The procedure does call for all spark plugs to be out.
12-15-2004, 07:19 PM
#40
Yeah I just did that as an added safeguard the car wouldn't just randomly kick in like it did on iansw car when we tested compression his compression. Pretty odd that it did it too considering we disconnected both fuel pumps, ran the car until it died, and cranked it over a few times before to make sure we got all the fuel......guess we didn't.
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