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

 

No doubt....I am about to turn over 200k on my 98!

 

DAYAMNNNN, u love your max or what!!!! I got a '98 as well except wit 42k miles!

 

You have good numbers there but you should remove all of the spark plugs when yo do a compression test. Also you need to turn the engine over the same number of times for each cylinder.

 

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

 

Yes, Nissan does make great motors, 163,XXX miles and still cooking

 

The Main reason im getting a Maxima is cause they last forever. My friends 1995 has 250,000 miles with the original auto tranny. Crazy good quality.

 

in about 700miles i hit 200k

 

Removing the plugs helps put less strain on the motor when cranking it.

 

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

 

With plugs = 190psi of compression resisting rotation. W/O plugs = no compression = easier turning.

Baby is fine. My sanity is not!

 

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

 

186xxx on my ve, lookin for 200k

 

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.

 

awesome. I love these motors. in fact I love them so much that I bought another motor with only 42k miles on it for $100.

 

239K+ still haulzz azz no major probs.. no oil leaks...no rust...original tranny and muffler too lol

 

Must not have been driven in the winter if it still has the original muffler.

 

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.

 

yea it has been drivin through all winters... had the car since 50K on it its a daily driver... City drivin 30%- Highway drivin 70%
lol my cat is burned through internaly..hehe

 

Cool, that makes more sense now. Thanks for the insight!

 

Thanks. I love Ian's car! It's awesome....

 

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...

 

98 GXE here just hit 182K...........

 

I know it is. I help with a bunch of the wrench turning on the car. I remember the days he ran a V1 S/C

S

 

my ehgine has 135k and the tranny is over 205k so how many miles is that?

 

135k......since I was talking about engines Navfe.

S

 

Works much better when you feed it fuel vs antifreeze.

 

Didn't he tell you? The antifreeze mix adds 500whp for 5 seconds before the car sputters out and dies.

Sorry Navfe....Jeff brought it up.

S

 

How?! 10 Chars...

 

With money?

 

He put it under his jacket at the junkyard and walked off.

 

does no one on here search ebay for i30 stuff? thats what i did. starting bid was $100 and it didn't go any higher so I won.

 

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?

 

Wow how did you do that? Hydrolock? Did you get the block magnafluxed or something?

 

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.

 

your just jealous you didnt think of it first.

 

But that's the thing! He thinks! You don't! hahahaha!


jwfy Navfe

 

The link to the thread about the cracked block.
http://forums.maxima.org/showthread....38#post3482938

 

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.

 

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.

S