noise under my valve cover - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

ludakris · 05-07-2007, 09:47 PM

Well like it says in the title theres a noise under my sr20's valve cover, i think i may have a loose valve. There is this clicking kinda noise and when i open up the throttle the clicking gets faster. I've gotten some opinions and thats what those opinions have gotten me, possibly a loose valve. I was wondering would it be hard to tighten up a loose valve or is it a very complicated process that i would really need to look into before doing? Any input would be great thanks in advance.

s13speeddrft · 05-07-2007, 10:44 PM

I personally do not own an sr20 but from other variuos replies to your same problem a good concensus is that when the hydraulic lifters get air in them they can make a ticking sound.

jspaeth · 05-08-2007, 07:42 AM

Make sure you have enough oil (I'm sure you do and all, but still check)

When my turbo went, I was burning alot of oil, and when it finally got too low, the valvetrain starting ticking....just added more oil and it went away.

Sileighty_85 · 05-08-2007, 08:06 AM

has it been siting up for a long time?

Its probably the Hydraulic Lash Adj. If its been sitting for a long time there is a possiblity of air getting in them.

ludakris · 05-08-2007, 10:13 AM

so would i need to bleed the hydrolic lifters to fix the air getting in problem? If so how deep do i have to go under the valve cover to get to the lifters? Do i have to go past the cams?

ludakris · 05-09-2007, 02:10 PM

anyone else with any kind of suggestion?

statik · 05-09-2007, 02:23 PM

I don't see how you could get air into the HLA's without running dangerously low on oil, but who knows. To bleed the HLA's you need to remove the cams in order to take them out, then just put them in a bowl filled with oil past the top of the HLA standing straight up, use something like a thick paper clip to push the ball inside back down, you will see air bubbles and should feel it move.

Honestly though I would start with checking your oil level. The chain tensioner depends on good oil pressure, thus, low oil = slack in chain which would hit the upper timing chain guide and make noise. You should pull the valve cover and remove the upper timing chain guide anyway as its not necessary (sits between the 2 cam gears), then check the chain tension, it shouldn't move much at all but over time the chain can stretch a bit, if theres too much slack you can upgrade the tensioner to the newer style, it has a larger opening to allow more oil into it and a slightly longer rod to take up the extra slack in the chain that develops over time.

steve shadows · 05-09-2007, 03:07 PM

Quote:

Originally Posted by ludakris

Well like it says in the title theres a noise under my sr20's valve cover, i think i may have a loose valve. There is this clicking kinda noise and when i open up the throttle the clicking gets faster. I've gotten some opinions and thats what those opinions have gotten me, possibly a loose valve. I was wondering would it be hard to tighten up a loose valve or is it a very complicated process that i would really need to look into before doing? Any input would be great thanks in advance.

if its from the top of the engine its probably timing chain guid touching the chian. you can

1.remove the guide
2.replace the timing chain tensioner

if this doesnt help then

1.replace the oil pump.front cover
2.replace the timing chain

in the proper order of course

heres a link to the fsm

http://www.pa-nissans.com/links/

-steve

ludakris · 05-10-2007, 10:03 PM

Thanks for the help guys i will be checking all of that as soon as i can.

05-07-2007, 09:47 PM	#1
ludakris Join Date: Oct 2005 Location: canada Posts: 17 Trader Rating: (2) Feedback Score: 2 reviews	noise under my valve cover Well like it says in the title theres a noise under my sr20's valve cover, i think i may have a loose valve. There is this clicking kinda noise and when i open up the throttle the clicking gets faster. I've gotten some opinions and thats what those opinions have gotten me, possibly a loose valve. I was wondering would it be hard to tighten up a loose valve or is it a very complicated process that i would really need to look into before doing? Any input would be great thanks in advance.

05-07-2007, 10:44 PM	#2
s13speeddrft Zilvia Member Join Date: Mar 2005 Location: orange county/ davis Age: 37 Posts: 235 Trader Rating: (1) Rides Gallery: s13speeddrft Feedback Score: 1 reviews	I personally do not own an sr20 but from other variuos replies to your same problem a good concensus is that when the hydraulic lifters get air in them they can make a ticking sound. __________________ http://s165.photobucket.com/albums/u63/ajhartma/ 1990 240sx hatch....currently monster truck status, with sunken battleships. Junkyard Scavenger

05-08-2007, 08:06 AM	#4
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	has it been siting up for a long time? Its probably the Hydraulic Lash Adj. If its been sitting for a long time there is a possiblity of air getting in them. __________________ 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

05-09-2007, 02:23 PM	#7
statik Zilvia FREAK! Join Date: Oct 2003 Location: Long Island, NY Age: 40 Posts: 1,358 Trader Rating: (0) Rides Gallery: statik Feedback Score: 0 reviews	I don't see how you could get air into the HLA's without running dangerously low on oil, but who knows. To bleed the HLA's you need to remove the cams in order to take them out, then just put them in a bowl filled with oil past the top of the HLA standing straight up, use something like a thick paper clip to push the ball inside back down, you will see air bubbles and should feel it move. Honestly though I would start with checking your oil level. The chain tensioner depends on good oil pressure, thus, low oil = slack in chain which would hit the upper timing chain guide and make noise. You should pull the valve cover and remove the upper timing chain guide anyway as its not necessary (sits between the 2 cam gears), then check the chain tension, it shouldn't move much at all but over time the chain can stretch a bit, if theres too much slack you can upgrade the tensioner to the newer style, it has a larger opening to allow more oil into it and a slightly longer rod to take up the extra slack in the chain that develops over time. __________________ 97 240sx esaarr \| Current Status: SOLD

05-08-2007, 07:42 AM	#3
jspaeth Nissanaholic! Join Date: Mar 2006 Location: Philadelphia suburbs Age: 40 Posts: 2,347 Trader Rating: (7) Rides Gallery: jspaeth Feedback Score: 7 reviews	Make sure you have enough oil (I'm sure you do and all, but still check) When my turbo went, I was burning alot of oil, and when it finally got too low, the valvetrain starting ticking....just added more oil and it went away.

05-08-2007, 10:13 AM	#5
ludakris Join Date: Oct 2005 Location: canada Posts: 17 Trader Rating: (2) Feedback Score: 2 reviews	so would i need to bleed the hydrolic lifters to fix the air getting in problem? If so how deep do i have to go under the valve cover to get to the lifters? Do i have to go past the cams?

05-09-2007, 02:10 PM	#6
ludakris Join Date: Oct 2005 Location: canada Posts: 17 Trader Rating: (2) Feedback Score: 2 reviews	anyone else with any kind of suggestion?

05-10-2007, 10:03 PM	#9
ludakris Join Date: Oct 2005 Location: canada Posts: 17 Trader Rating: (2) Feedback Score: 2 reviews	Thanks for the help guys i will be checking all of that as soon as i can.