Stock compression numbers for a ka24de? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

TurbLu · 10-08-2006, 10:46 AM

Hi guys,

I know I am suppose to warm up the engine before doing a compression test, but I cant do that right now. So what kind of compression numbers should I expect for a stock Ka24de compression?

Indolent · 10-08-2006, 12:26 PM

180ish, anything above is really good
and don't forget to have the throttle body open

PS13 SILVIA · 10-08-2006, 12:39 PM

Standard is 179 psi
Minimum is 151 psi
With max difference of 14psi

95zilvia · 10-08-2006, 03:47 PM

last time when i did mine cold
it was 200 psi across the board

PS13 SILVIA · 10-08-2006, 04:33 PM

Quote:

Originally Posted by 95zilvia

last time when i did mine cold
it was 200 psi across the board

Possibly something wrong with the compression tester gauge or you just have a shit load of carbon biuldup on your pistons...lol

PITCH · 10-08-2006, 05:41 PM

Did mine last week.

190,190,195,195

97 KA24DE 128K

I'm beleiving carbon buildup also.

gotta240 · 10-09-2006, 01:38 AM

190 or above equals

milled head
carbon buildup
bad tester
or maybe brand new ka with 15k. miles on it...doubt it though!

95zilvia · 10-09-2006, 01:57 AM

yeah i think ill check it again sometime

eddie91 · 07-20-2011, 03:34 PM

i did mine today it was
175,175,188,175-_-

Hashiriya415 · 07-20-2011, 04:06 PM

Cold rebuilt engine about 155, 180 when hot.

91es13coop · 08-27-2011, 05:24 PM

90 across all 4?>?? but runs really well? what am i doing wrong

orion::S14 · 08-28-2011, 01:40 PM

^^^ Engine warm? Throttle held wide open when testing? Battery fully charged? Crank over at least 3-4 times per cylinder...

...to get a good reading.

- Brian

terribleibs · 12-11-2011, 08:58 PM

Did mine todau. 195 across the board. I beleive it to be rebuilt so i am assuming milled head.

godrifttoday · 12-11-2011, 11:38 PM

140 cold ... Fawk

OoAtreyuloO · 12-12-2011, 10:56 AM

18x across warm

Silverbullet · 12-12-2011, 11:00 AM

Quote:

Originally Posted by godrifttoday

140 cold ... Fawk

how cold is cold? The reason you do it warm is so that it is tested at a controlled temperature where the rings will be expanded to the right amount.

Your rings will be a different size at 40 degree vs 80 degree weather affecting your compression results, it may be minimal but try again when its warm.

MurkyRiversS13 · 01-18-2012, 06:22 PM

Can I borrow someones carbon buildup???

I got 119, 121, 120, 121 on a warm engine.

Cap full of oil gave me 140, 170, 150, 150...... new rings are in order for this bad boy.

roboticnissan · 01-18-2012, 06:27 PM

Ive got 90k miles on my motor and i get 150 on all four cold and 170 warm. For sure never been rebuilt all stock and original from the day it was built

SMM · 01-18-2012, 06:53 PM

Just for you newbs.

Warm engine up.
While engine is running pull the fuel pump fuse. ( Relieves fuel pressure)
Pull all plugs.
Disconnect distributor.
Gas pedal to the floor.
Crank 3-5 times per cylinder.

Did mine on my newest s14. 160k.

210 210 210 210.......Carbon build upppp, runs like a beast though.

oneround1 · 01-19-2012, 11:29 AM

That's nice! ^ thanks for the info.
Compression I had was 190 across warm.

thinhthan · 02-25-2012, 12:10 AM

i got 150. 151. 150. 130. how much oil should i pour into the hole to check to see if i need new rings?

*fliprayzin240sx* · 02-25-2012, 02:39 AM

Quote:

Originally Posted by thinhthan

i got 150. 151. 150. 130. how much oil should i pour into the hole to check to see if i need new rings?

Just a oil cap full. But just looking at that 130, that shit is probably done. I'm sitting at 140-150 on mine and I'm burning oil with the HG probably on its way out.

MurkyRiversS13 · 02-25-2012, 07:25 AM

Yup just an oil cap full of oil in each cylinder.

thinhthan · 02-25-2012, 12:01 PM

a oil cap as in the quart cap or a gallon cap? my car doesnt burn oil or smoke or anything. it drives fine. the engine shakes a lil though when im at like a light. so should i do a rebuild? if so is there a rebuild kit i can buy?

MurkyRiversS13 · 02-25-2012, 12:06 PM

quart cap, definitely not the big ass cap.

Make sure you have the car turn over 7 times. remove all of the spark plugs and do one cylinder at a time withe the throttle full open. Make sure you test on a warm engine as well.

Engine shaking can be related to other things as well. Cylinder misfire and bad engine mounts. It all depends.

Im sure you can buy new rings from autozone or something if you want to do a budget rebuild. Check your cylinder walls for scoring (bad) and if you can still see the cross hatching from the honing and no scoring, you should be good with new rings.

Granted its your bottom end that is causing your low compression. Could be the head causing the problem.

thinhthan · 02-25-2012, 12:18 PM

do all the plugs have to be removed cause all i did was take one spark plug out put in the tester. pushed gas pedal down and cranked it like 3 time each time like 4 secs and i did it one cylinder at a time with all the other plugs in. would that make a differences if the other plugs are still in? i drove the car to the store before i checked it so it was warm. and when i put the oil in the cylinder with 130 it only raised it like prob by 5 psi so now im guessing its my lifters? that has a problem

MurkyRiversS13 · 02-25-2012, 12:27 PM

Yea all other plugs should be out. It will make it easier for the test and better result. You unplug the injectors right?

You should do about 7 turns not 3-4. You'll hear the compression stroke when turning the car over.

thinhthan · 02-25-2012, 01:45 PM

how do i hear the compression stroke? and how do i know its 7 turns? i didnt unplug the injectors i just pulled out the fuel pump fuse and started it until it died than i unplug the distributor

MurkyRiversS13 · 02-25-2012, 02:01 PM

The way you do it is the right way. When you start the test you'll be able to hear the compression stroke trust me.

thinhthan · 02-25-2012, 02:04 PM

and i had a question. sometimes when im doing the test ill hear a pop. is that something i should worry about?

10-08-2006, 10:46 AM	#1
TurbLu Zilvia Member Join Date: Sep 2006 Location: Las Vegas Posts: 197 Trader Rating: (0) Feedback Score: 0 reviews	Stock compression numbers for a ka24de? Hi guys, I know I am suppose to warm up the engine before doing a compression test, but I cant do that right now. So what kind of compression numbers should I expect for a stock Ka24de compression?

07-20-2011, 03:34 PM	#9
eddie91 Join Date: Mar 2011 Location: downey.kali Age: 30 Posts: 45 Trader Rating: (0) Feedback Score: 0 reviews	i did mine today it was 175,175,188,175-_- __________________ eddie91

08-27-2011, 05:24 PM	#11
91es13coop Leaky Injector Join Date: Oct 2008 Location: san antonio Age: 35 Posts: 146 Trader Rating: (1) Feedback Score: 1 reviews	90 across all 4?>?? but runs really well? what am i doing wrong __________________ eatSleepDRIFT

08-28-2011, 01:40 PM	#12
orion::S14 Nissanaholic! Join Date: May 2003 Location: Orange Park, FL Posts: 1,665 Trader Rating: (0) Feedback Score: 0 reviews	^^^ Engine warm? Throttle held wide open when testing? Battery fully charged? Crank over at least 3-4 times per cylinder... ...to get a good reading. - Brian __________________ www.KA24DEvelopment.com

12-11-2011, 11:38 PM	#14
godrifttoday Post Whore! Join Date: Jan 2004 Location: los angeles Age: 37 Posts: 3,120 Trader Rating: (82) Feedback Score: 82 reviews	140 cold ... Fawk __________________ NEED Bolt kits for your car?

10-08-2006, 12:26 PM	#2
Indolent Zilvia FREAK! Join Date: Jun 2005 Location: So. Cal, Riverside Area Posts: 1,110 Trader Rating: (3) Feedback Score: 3 reviews	180ish, anything above is really good and don't forget to have the throttle body open

10-08-2006, 12:39 PM	#3
PS13 SILVIA Join Date: Oct 2006 Location: I.E. Age: 45 Posts: 2 Trader Rating: (0) Feedback Score: 0 reviews	Standard is 179 psi Minimum is 151 psi With max difference of 14psi

10-08-2006, 03:47 PM	#4
95zilvia Nissanaholic! Join Date: Jun 2003 Location: South San Francisco Age: 37 Posts: 1,860 Trader Rating: (0) Rides Gallery: 95zilvia Feedback Score: 0 reviews	last time when i did mine cold it was 200 psi across the board

10-08-2006, 05:41 PM	#6
PITCH Zilvia FREAK! Join Date: Jan 2006 Location: GA Age: 40 Posts: 1,103 Trader Rating: (5) Feedback Score: 5 reviews	Did mine last week. 190,190,195,195 97 KA24DE 128K I'm beleiving carbon buildup also.

10-09-2006, 01:38 AM	#7
gotta240 Post Whore! Join Date: Dec 2005 Location: so cal Posts: 3,496 Trader Rating: (21) Feedback Score: 21 reviews	190 or above equals milled head carbon buildup bad tester or maybe brand new ka with 15k. miles on it...doubt it though!

10-09-2006, 01:57 AM	#8
95zilvia Nissanaholic! Join Date: Jun 2003 Location: South San Francisco Age: 37 Posts: 1,860 Trader Rating: (0) Rides Gallery: 95zilvia Feedback Score: 0 reviews	yeah i think ill check it again sometime

07-20-2011, 04:06 PM	#10
Hashiriya415 Zilvia FREAK! Join Date: Jun 2007 Location: San Francisco Age: 33 Posts: 1,007 Trader Rating: (22) Feedback Score: 22 reviews	Cold rebuilt engine about 155, 180 when hot.

12-11-2011, 08:58 PM	#13
terribleibs Join Date: Dec 2011 Location: arizona Posts: 1 Trader Rating: (0) Feedback Score: 0 reviews	Did mine todau. 195 across the board. I beleive it to be rebuilt so i am assuming milled head.

12-12-2011, 10:56 AM	#15
OoAtreyuloO Zilvia Junkie Join Date: Feb 2011 Location: Compton Age: 31 Posts: 340 Trader Rating: (1) Feedback Score: 1 reviews	18x across warm

01-18-2012, 06:22 PM	#17
MurkyRiversS13 Zilvia Junkie Join Date: Aug 2011 Location: SoCal / High Desert Posts: 543 Trader Rating: (19) Feedback Score: 19 reviews	Can I borrow someones carbon buildup??? I got 119, 121, 120, 121 on a warm engine. Cap full of oil gave me 140, 170, 150, 150...... new rings are in order for this bad boy.

01-18-2012, 06:27 PM	#18
roboticnissan Nissanaholic! Join Date: Mar 2007 Location: SOCAL/NORCAL Age: 32 Posts: 1,867 Trader Rating: (12) Feedback Score: 12 reviews	Ive got 90k miles on my motor and i get 150 on all four cold and 170 warm. For sure never been rebuilt all stock and original from the day it was built __________________

01-18-2012, 06:53 PM	#19
SMM Zilvia Addict Join Date: Sep 2009 Location: tampa Age: 33 Posts: 819 Trader Rating: (26) Feedback Score: 26 reviews	Just for you newbs. Warm engine up. While engine is running pull the fuel pump fuse. ( Relieves fuel pressure) Pull all plugs. Disconnect distributor. Gas pedal to the floor. Crank 3-5 times per cylinder. Did mine on my newest s14. 160k. 210 210 210 210.......Carbon build upppp, runs like a beast though.

01-19-2012, 11:29 AM	#20
oneround1 Join Date: Dec 2011 Location: modesto california Posts: 8 Trader Rating: (0) Feedback Score: 0 reviews	That's nice! ^ thanks for the info. Compression I had was 190 across warm.

02-25-2012, 12:10 AM	#21
thinhthan Leaky Injector Join Date: Nov 2010 Location: colorado Age: 33 Posts: 124 Trader Rating: (1) Feedback Score: 1 reviews	i got 150. 151. 150. 130. how much oil should i pour into the hole to check to see if i need new rings?

02-25-2012, 07:25 AM	#23
MurkyRiversS13 Zilvia Junkie Join Date: Aug 2011 Location: SoCal / High Desert Posts: 543 Trader Rating: (19) Feedback Score: 19 reviews	Yup just an oil cap full of oil in each cylinder.

02-25-2012, 12:01 PM	#24
thinhthan Leaky Injector Join Date: Nov 2010 Location: colorado Age: 33 Posts: 124 Trader Rating: (1) Feedback Score: 1 reviews	a oil cap as in the quart cap or a gallon cap? my car doesnt burn oil or smoke or anything. it drives fine. the engine shakes a lil though when im at like a light. so should i do a rebuild? if so is there a rebuild kit i can buy?

02-25-2012, 12:06 PM	#25
MurkyRiversS13 Zilvia Junkie Join Date: Aug 2011 Location: SoCal / High Desert Posts: 543 Trader Rating: (19) Feedback Score: 19 reviews	quart cap, definitely not the big ass cap. Make sure you have the car turn over 7 times. remove all of the spark plugs and do one cylinder at a time withe the throttle full open. Make sure you test on a warm engine as well. Engine shaking can be related to other things as well. Cylinder misfire and bad engine mounts. It all depends. Im sure you can buy new rings from autozone or something if you want to do a budget rebuild. Check your cylinder walls for scoring (bad) and if you can still see the cross hatching from the honing and no scoring, you should be good with new rings. Granted its your bottom end that is causing your low compression. Could be the head causing the problem.

02-25-2012, 12:18 PM	#26
thinhthan Leaky Injector Join Date: Nov 2010 Location: colorado Age: 33 Posts: 124 Trader Rating: (1) Feedback Score: 1 reviews	do all the plugs have to be removed cause all i did was take one spark plug out put in the tester. pushed gas pedal down and cranked it like 3 time each time like 4 secs and i did it one cylinder at a time with all the other plugs in. would that make a differences if the other plugs are still in? i drove the car to the store before i checked it so it was warm. and when i put the oil in the cylinder with 130 it only raised it like prob by 5 psi so now im guessing its my lifters? that has a problem

02-25-2012, 12:27 PM	#27
MurkyRiversS13 Zilvia Junkie Join Date: Aug 2011 Location: SoCal / High Desert Posts: 543 Trader Rating: (19) Feedback Score: 19 reviews	Yea all other plugs should be out. It will make it easier for the test and better result. You unplug the injectors right? You should do about 7 turns not 3-4. You'll hear the compression stroke when turning the car over.

02-25-2012, 01:45 PM	#28
thinhthan Leaky Injector Join Date: Nov 2010 Location: colorado Age: 33 Posts: 124 Trader Rating: (1) Feedback Score: 1 reviews	how do i hear the compression stroke? and how do i know its 7 turns? i didnt unplug the injectors i just pulled out the fuel pump fuse and started it until it died than i unplug the distributor

02-25-2012, 02:01 PM	#29
MurkyRiversS13 Zilvia Junkie Join Date: Aug 2011 Location: SoCal / High Desert Posts: 543 Trader Rating: (19) Feedback Score: 19 reviews	The way you do it is the right way. When you start the test you'll be able to hear the compression stroke trust me.

02-25-2012, 02:04 PM	#30
thinhthan Leaky Injector Join Date: Nov 2010 Location: colorado Age: 33 Posts: 124 Trader Rating: (1) Feedback Score: 1 reviews	and i had a question. sometimes when im doing the test ill hear a pop. is that something i should worry about?

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