Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Go Back   Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum > General > Tech Talk > Engine Tech

Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series.


Reply
 
Thread Tools Display Modes
Old 04-08-2013, 04:56 PM   #61
ultimateirving
Zilvia FREAK!
 
ultimateirving's Avatar
 
Join Date: Nov 2010
Location: arizona
Age: 33
Posts: 1,519
Trader Rating: (1)
ultimateirving is an unknown quantity at this point
Feedback Score: 1 reviews
Quote:
Originally Posted by Danger_Dorn View Post
So...did a compression test today. Found out cylinder 4 (one closest to the firewall?) was the only one with compression at about 100. The other cylinders had 0. Not sure whats going on. Cosworth Metal headgasket, Arp headstuds torqued to 90, copper tack spray on both sides of the HG. I dont know what else to do or if I should do a tear down and put new piston rings in...This is my DD and its already been down for like a month between waiting on parts and BS. Thanks
Wow thats pretty crazy man, I would get a leak down test to see what the results say.
__________________
Z32 with lq4 swap
Desert Street Scene || Dssevents.com
ultimateirving is offline   Reply With Quote
Sponsored Links
Old 04-08-2013, 05:09 PM   #62
Danger_Dorn
Zilvia Member
 
Danger_Dorn's Avatar
 
Join Date: Oct 2012
Location: Jacksonville NC
Age: 30
Posts: 265
Trader Rating: (0)
Danger_Dorn is an unknown quantity at this point
Feedback Score: 0 reviews
Angry

No where around here has a leakdown I just want the damn thing to run so Ill probably be passing it off to a shop for new rings, bearings and valve seals. How much should all that be? 1K? Maybe more? Sick of this damn car right now. Sorry for the rant but you know how it is.
Danger_Dorn is offline   Reply With Quote
Old 04-08-2013, 10:15 PM   #63
codyace
Post Whore!
 
codyace's Avatar
 
Join Date: Dec 2004
Location: Poconos, PA
Age: 36
Posts: 8,030
Trader Rating: (58)
codyace is close to perfectioncodyace is close to perfectioncodyace is close to perfectioncodyace is close to perfectioncodyace is close to perfectioncodyace is close to perfectioncodyace is close to perfectioncodyace is close to perfectioncodyace is close to perfectioncodyace is close to perfectioncodyace is close to perfection
Feedback Score: 58 reviews
Send a message via AIM to codyace
Avoid a shop for as long as you can, unless there is a reputable one near you.

I'd be willing to bet it's the HG not sealing.
__________________

Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information!

Quest Alternator Conversions for SR20! Check my Group Buy!

Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy
codyace is offline   Reply With Quote
Old 04-08-2013, 10:34 PM   #64
Kingtal0n
Post Whore!
 
Kingtal0n's Avatar
 
Join Date: Jul 2005
Location: South Florida
Age: 38
Posts: 4,649
Trader Rating: (17)
Kingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond repute
Feedback Score: 17 reviews
Send a message via AIM to Kingtal0n
0psi? are you sure? that sounds wrong, even a bad set of rings will get you 60-90psi of compression. Even if half the top of the piston is missing/melted you should still get something. Do more testing. pull the head if you have to.

Did you get the block decked at any point and forget to deck the oil pump? Was anyone ever in the bottom end? pull the valvecover and watch the valves open and close, and check the cam timing.

***edit
I watched your video. The only extra thing I can think of is improper torque sequence of head studs, which you shouldnt even be using unless you decked the block with a torque plate attached.
If I was in your situation, I would double check the compression first, and do a leakdown test, to verify where your compression is going. Buy one on ebay if you have to. I found one at harbor freight in a pinch, used and returned it.
__________________
5.3/4l80e/turbo 240sx playthrough:
https://tinyurl.com/turbo240
Kingtal0n is offline   Reply With Quote
Old 04-09-2013, 03:44 AM   #65
Danger_Dorn
Zilvia Member
 
Danger_Dorn's Avatar
 
Join Date: Oct 2012
Location: Jacksonville NC
Age: 30
Posts: 265
Trader Rating: (0)
Danger_Dorn is an unknown quantity at this point
Feedback Score: 0 reviews
Thanks guys Ill try to hunt down a leakdown tester. As far a torque sequence, I did it according to ARP's and the FSM directions and they are torqued to 90 So I guess Ill get back to you with the results. Any sounds I should be listening for if I turn the motor over manually such as air whooshing or whatever?
Danger_Dorn is offline   Reply With Quote
Old 04-09-2013, 07:35 AM   #66
Kingtal0n
Post Whore!
 
Kingtal0n's Avatar
 
Join Date: Jul 2005
Location: South Florida
Age: 38
Posts: 4,649
Trader Rating: (17)
Kingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond repute
Feedback Score: 17 reviews
Send a message via AIM to Kingtal0n
Quote:
Originally Posted by Danger_Dorn View Post
Thanks guys Ill try to hunt down a leakdown tester. As far a torque sequence, I did it according to ARP's and the FSM directions and they are torqued to 90 So I guess Ill get back to you with the results. Any sounds I should be listening for if I turn the motor over manually such as air whooshing or whatever?
I thought of something while I was falling asleep.

Take out all of the plugs. crank the engine. It should turn over smoothy, fast. air should whoosh right out of the spark plug holes. (verify this)

Now, install just 1 single spark plug and crank again. the motor should still turn smoothly, but when it hits that one cylinder, it should slow down and make obvious compression noises.

do that for each plug, and determine if the engine sounds different on different cylinders. If what you say is true about #4, then it should only really slow down on #4.

again, did somebody deck the block and forget to deck the oil pump? I am still having a hard time believing 0psi on 1-3.
To me, if that was any old random motor, I would just install some new plugs and watch it fire right up.
__________________
5.3/4l80e/turbo 240sx playthrough:
https://tinyurl.com/turbo240
Kingtal0n is offline   Reply With Quote
Old 04-09-2013, 08:48 AM   #67
Danger_Dorn
Zilvia Member
 
Danger_Dorn's Avatar
 
Join Date: Oct 2012
Location: Jacksonville NC
Age: 30
Posts: 265
Trader Rating: (0)
Danger_Dorn is an unknown quantity at this point
Feedback Score: 0 reviews
Thanks, Ill give that ^ a try man. I have cranked and cranked and it will just sputter on 1 cyl (#4). Now all I can think is 1, maybe washed out piston rings from flooding but in that case i would still have SOME kind of compression. I dont know. My next guess was that the head gasket didnt seal right considering that 1: I didnt deck the block at all, and 2: I used a cosworth 1.8 mm metal hg. So maybe it didnt seal right? I would love to hand it over to a shop and make them deal with it but thats 1300 bones or so compared to doing it myself for 300?
Danger_Dorn is offline   Reply With Quote
Old 04-09-2013, 11:17 AM   #68
Danger_Dorn
Zilvia Member
 
Danger_Dorn's Avatar
 
Join Date: Oct 2012
Location: Jacksonville NC
Age: 30
Posts: 265
Trader Rating: (0)
Danger_Dorn is an unknown quantity at this point
Feedback Score: 0 reviews
Talking

UPDATE! Best shop in town (1 of 3 lol) has informed me that they can rebuild everything like main bearings, piston rings, HG blah blah for 5-600 bucks. All I have to do is pull the motor and voilla! Glad my motor is easy as hell to take out. 4 Hours tops I think...
Danger_Dorn is offline   Reply With Quote
Old 06-08-2013, 01:49 PM   #69
Danger_Dorn
Zilvia Member
 
Danger_Dorn's Avatar
 
Join Date: Oct 2012
Location: Jacksonville NC
Age: 30
Posts: 265
Trader Rating: (0)
Danger_Dorn is an unknown quantity at this point
Feedback Score: 0 reviews
Angry Horror Story

Yeah so reviving my own thread. Got my motor back from the shop and still....you guessed it, NOTHING. Same as when I dropped it off. Im about to take the car and motor up there this monday and say make it work or we're going to have problems. Compression on 1 and 4. 2 and 3 still dead. Got new everything (bearings, rings, metal HG, decked head and block, new valve seals, ARP rod bolts, ARP Head studs, new valve shims and guides, new timing chain kit) Yeah....so Im at a loss. Any Ideas?
Danger_Dorn is offline   Reply With Quote
Old 06-08-2013, 04:17 PM   #70
OnTheChip
Zilvia Junkie
 
OnTheChip's Avatar
 
Join Date: May 2013
Location: Burgaw, NC
Posts: 311
Trader Rating: (0)
OnTheChip is an unknown quantity at this point
Feedback Score: 0 reviews
Are you sure your compression tester is working?
OnTheChip is offline   Reply With Quote
Old 06-08-2013, 05:28 PM   #71
cotbu
Post Whore!
 
cotbu's Avatar
 
Join Date: Sep 2005
Location: SWFL
Age: 47
Posts: 3,318
Trader Rating: (3)
cotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nice
Feedback Score: 3 reviews
You need to do that leak down! You're just shooting in the dark if all you have is no compression on 2 and 3. You could put this to bed if the block is damaged or the rings are toast, etc. Leak down, and/or tear down and install a stock head gasket just for testing.
__________________

LoverTechnologies "Half Broken Things!"
cotbu is offline   Reply With Quote
Old 06-12-2013, 11:00 AM   #72
Danger_Dorn
Zilvia Member
 
Danger_Dorn's Avatar
 
Join Date: Oct 2012
Location: Jacksonville NC
Age: 30
Posts: 265
Trader Rating: (0)
Danger_Dorn is an unknown quantity at this point
Feedback Score: 0 reviews
Hello friends! Got the problem solved. The whole time it was not enough cranking amps to make oil PSI for the lifters! We put 200A through that bish and it fired right up. Now I'm having misfire issues but thats a diff thread
Danger_Dorn is offline   Reply With Quote
Reply

Bookmarks


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 05:38 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
vB.Sponsors
Copyright © 1998 - 2019, Zilvia.net™