Replacing valve seals with head on block? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Pstl_pete · 07-15-2008, 09:38 PM

My brand new engine has bad valve seals and is smoking like a mofo. I need to replace them but I REALLY dont want to pull the motor out since I just installed it. Im sure there is a tool that can make this job quite easy with the head still on the car but I cant seem to find it.

Can anyone link me or recommend a valve spring compressor that will work on SR heads.

nicku · 07-15-2008, 09:41 PM

i got mine from MAG tool
65 bucks...you just need to pressurelize the motor so the valves dont drop after you pull out the springs

s13drob · 07-15-2008, 09:42 PM

use the 1 from snap on. it has a bar that bolt on 2 help with leverage. check it out.

SoguRacing · 07-15-2008, 09:45 PM

get some pics of what you're doing. i may need to do the same.

Sileighty_85 · 07-15-2008, 10:20 PM

well if you are removing the springs with the head still on dont forget you need that sparkplug tool to presureize the cylinder to keep the valve from dropping into the cylinder

louisdaboois · 07-16-2008, 06:25 AM

well sr's are interferece motors. you can just set which ever cylinder youre working on to TDC and just let the valve fall on top of the piston. while you replace the seals. afterwards you can pick it up with your fingers, or with a magnet.

shmiddy · 07-16-2008, 06:36 AM

i herd of some tool that acually holds the valves in place by using pressurized air.. i think you connect it where the spark plug goes and it shots air in the conbustion chamber holding valve in place...... but im not to sure

prodigys14 · 07-16-2008, 06:52 AM

yea the tool that pressurizes the cylinder would probably be the easyest way of doing it

DWvinny · 07-16-2008, 07:07 AM

Quote:

Originally Posted by louisdaboois

well sr's are interferece motors. you can just set which ever cylinder youre working on to TDC and just let the valve fall on top of the piston. while you replace the seals. afterwards you can pick it up with your fingers, or with a magnet.

take this advise !! pressure tool is good but if you even have the slightest leak the valves could fall in and youre fucked!! its very simple and will save you the extra cost for the tool.
#1.take out the spark plug
#2 put a long screw driver in the hole
#3 crank the motor over with a socket wrench until the piston pushes it out
#4 replace seal
#5 repeat with other 3

my advise would be also to change springs and retainers while you're there

tukn9s · 07-16-2008, 07:25 AM

Quote:

Originally Posted by DWvinny

take this advise !! pressure tool is good but if you even have the slightest leak the valves could fall in and youre fucked!! its very simple and will save you the extra cost for the tool.
#1.take out the spark plug
#2 put a long screw driver in the hole
#3 crank the motor over with a socket wrench until the piston pushes it out
#4 replace seal
#5 repeat with other 3

my advise would be also to change springs and retainers while you're there

Thats the way I did mine and it worked great

Pstl_pete · 07-16-2008, 01:34 PM

Thanks guys.

Can someone post a photo of the compressor. Im having a hard time finding it in the Snap-on catalog and site.

garagelu · 07-16-2008, 01:42 PM

Here is the one I used. Its the same style as the Snap on but just no name and cheaper. I got it on ebay for 60 dollars. Seach for "valve spring tool"

Pstl_pete · 07-16-2008, 02:29 PM

OH YEAH! that looks very promising!

07-16-2008, 06:36 AM	#7
shmiddy Zilvia FREAK! Join Date: Nov 2007 Location: nyc Age: 38 Posts: 1,279 Trader Rating: (2) Feedback Score: 2 reviews	i herd of some tool that acually holds the valves in place by using pressurized air.. i think you connect it where the spark plug goes and it shots air in the conbustion chamber holding valve in place...... but im not to sure __________________ i fully de-volved

07-16-2008, 01:34 PM	#11
Pstl_pete Zilvia Junkie Join Date: Nov 2004 Location: LA,CA & Windsor, ON Posts: 443 Trader Rating: (4) Feedback Score: 4 reviews	Thanks guys. Can someone post a photo of the compressor. Im having a hard time finding it in the Snap-on catalog and site. __________________ S14 - New SR Project http://www.speed.academy

07-16-2008, 02:29 PM	#13
Pstl_pete Zilvia Junkie Join Date: Nov 2004 Location: LA,CA & Windsor, ON Posts: 443 Trader Rating: (4) Feedback Score: 4 reviews	OH YEAH! that looks very promising! __________________ S14 - New SR Project http://www.speed.academy

07-15-2008, 09:38 PM	#1
Pstl_pete Zilvia Junkie Join Date: Nov 2004 Location: LA,CA & Windsor, ON Posts: 443 Trader Rating: (4) Feedback Score: 4 reviews	Replacing valve seals with head on block? My brand new engine has bad valve seals and is smoking like a mofo. I need to replace them but I REALLY dont want to pull the motor out since I just installed it. Im sure there is a tool that can make this job quite easy with the head still on the car but I cant seem to find it. Can anyone link me or recommend a valve spring compressor that will work on SR heads. __________________ S14 - New SR Project http://www.speed.academy

07-15-2008, 09:41 PM	#2
nicku Zilvia Junkie Join Date: Aug 2007 Location: St. Cloud, MN Age: 39 Posts: 545 Trader Rating: (0) Feedback Score: 0 reviews	i got mine from MAG tool 65 bucks...you just need to pressurelize the motor so the valves dont drop after you pull out the springs __________________

07-15-2008, 09:42 PM	#3
s13drob Zilvia Addict Join Date: Jan 2008 Location: socal Posts: 774 Trader Rating: (29) Feedback Score: 29 reviews	use the 1 from snap on. it has a bar that bolt on 2 help with leverage. check it out.

07-15-2008, 09:45 PM	#4
SoguRacing Post Whore! Join Date: Nov 2007 Location: (714) Age: 38 Posts: 2,967 Trader Rating: (23) Rides Gallery: SoguRacing Feedback Score: 23 reviews	get some pics of what you're doing. i may need to do the same. __________________ Pre Tune Checkup! Compression,LeakDown,Vacuum Test $80. Cams Install: $180

07-15-2008, 10:20 PM	#5
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	well if you are removing the springs with the head still on dont forget you need that sparkplug tool to presureize the cylinder to keep the valve from dropping into the cylinder __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

07-16-2008, 06:25 AM	#6
louisdaboois Zilvia Addict Join Date: Dec 2006 Location: LA, CA Age: 35 Posts: 851 Trader Rating: (28) Feedback Score: 28 reviews	well sr's are interferece motors. you can just set which ever cylinder youre working on to TDC and just let the valve fall on top of the piston. while you replace the seals. afterwards you can pick it up with your fingers, or with a magnet.

07-16-2008, 06:52 AM	#8
prodigys14 Leaky Injector Join Date: Mar 2007 Location: hawaii Posts: 54 Trader Rating: (0) Feedback Score: 0 reviews	yea the tool that pressurizes the cylinder would probably be the easyest way of doing it

07-16-2008, 01:42 PM	#12
garagelu Nissanaholic! Join Date: Aug 2005 Location: Atlanta, GA Age: 38 Posts: 1,856 Trader Rating: (60) Feedback Score: 60 reviews	Here is the one I used. Its the same style as the Snap on but just no name and cheaper. I got it on ebay for 60 dollars. Seach for "valve spring tool"