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D See 2 · 04-21-2004, 06:52 PM

just wondering because there has been an annoying rapping sound coming from my head. (1g b16a) i have titanium retainers and dual valve springs installed along with comp cams stage 2 camshafts. i've checked the valve lash several times and everything is within spec. so my question is... with the higher lift of these cams... could or can the LMA's go bad or become worn out?

cws13 · 04-22-2004, 12:43 AM

I have never seen or heard of it. If you have a very agressive ramp on your cam profile you can chew up the whole valve assembly in time. Not really with those cams though.

D See 2 · 04-22-2004, 07:42 AM

valve assembly meaning rocker arms etc...

Calesta · 04-22-2004, 12:29 PM

Yes, LMAs can go bad. If you want to do a quick check, press down on the LMAs through your followers, and make sure that none of them are sticking. When you go with larger cams, you generally want to get ITR LMAs. They have a bit more clearance for larger lobes. With cams that are about ITR sized, you can use stock LMAs- for larger cams, it's safer to use new ITR LMAs. I had a funny noise in my B16's head, and it turned out to be sticking LMAs.

If your LMAs are sticking and you don't want to spend cash buying new ones, you can try to refresh them by removing and soaking them in a tub of fresh engine oil overnight. Sometimes that helps them to loosen up.

97CTR · 04-22-2004, 12:40 PM

What valve lash are you running?

D See 2 · 04-23-2004, 07:11 AM

int.: .006 in.
exh.: .007 in.
stock specs... i have a feeling the LMA's are bad.
It sounds like the cam is "slapping" the rockers arms. I'll pull the valve cover off today and see what i can find out...

92b16vx · 04-23-2004, 08:59 AM

Quote:

Originally posted by DTEC@Apr 23 2004, 12:11 PM
int.: .006 in.
exh.: .007 in.
stock specs... i have a feeling the LMA's are bad.
It sounds like the cam is "slapping" the rockers arms. I'll pull the valve cover off today and see what i can find out...

Keep us posted, when I switched to CTR cams there was a lot more valve noise coming from the VC than before using stock B16A valve clearance specs, maybe it has something to do your issue.

cws13 · 04-24-2004, 02:28 AM

Ditto, new one on me. I'd like to know what it turns out to be. Good luck.

04-21-2004, 06:52 PM	#1
D See 2 Senior Member Join Date: Sep 2002 Location: Baltimore, MD Age: 25 Posts: 2,401 iTrader: 0 / 0% Ride: '92 Civic CX Rep Power: 39	just wondering because there has been an annoying rapping sound coming from my head. (1g b16a) i have titanium retainers and dual valve springs installed along with comp cams stage 2 camshafts. i've checked the valve lash several times and everything is within spec. so my question is... with the higher lift of these cams... could or can the LMA's go bad or become worn out? __________________ Garage: 1992 CX Hatch > Current Money Pit Grave: R.I.P. 1995 Integra GSR R.I.P. 1990 DX Hatch R.I.P. 1990 CRX Si

04-22-2004, 12:43 AM	#2
cws13 Senior Member Join Date: Nov 2002 Location: Athens,GA Posts: 484 iTrader: 0 / 0% Rep Power: 19	I have never seen or heard of it. If you have a very agressive ramp on your cam profile you can chew up the whole valve assembly in time. Not really with those cams though. __________________ 1320 Motorsports Athens,GA <a href=\'http://www.1320motorsports.com\' target=\'_blank\'>1320 MOTORSPORTS</a>

04-22-2004, 07:42 AM	#3
D See 2 Senior Member Join Date: Sep 2002 Location: Baltimore, MD Age: 25 Posts: 2,401 iTrader: 0 / 0% Ride: '92 Civic CX Rep Power: 39	valve assembly meaning rocker arms etc... __________________ Garage: 1992 CX Hatch > Current Money Pit Grave: R.I.P. 1995 Integra GSR R.I.P. 1990 DX Hatch R.I.P. 1990 CRX Si

04-22-2004, 12:29 PM	#4
Calesta Admin with a big stick Join Date: Sep 2002 Location: Dallas / Fort Worth, TX Age: 32 Posts: 24,525 iTrader: 0 / 0% Ride: 2003 S2000 Rep Power: 291	Yes, LMAs can go bad. If you want to do a quick check, press down on the LMAs through your followers, and make sure that none of them are sticking. When you go with larger cams, you generally want to get ITR LMAs. They have a bit more clearance for larger lobes. With cams that are about ITR sized, you can use stock LMAs- for larger cams, it's safer to use new ITR LMAs. I had a funny noise in my B16's head, and it turned out to be sticking LMAs. If your LMAs are sticking and you don't want to spend cash buying new ones, you can try to refresh them by removing and soaking them in a tub of fresh engine oil overnight. Sometimes that helps them to loosen up. __________________ DO NOT PM me with tech questions! Use the forums! Intercrew Auto Salon - (972) 485-8688

04-22-2004, 12:40 PM	#5
97CTR Senior Member Join Date: Jul 2003 Posts: 745 iTrader: 0 / 0% Rep Power: 20	What valve lash are you running? __________________ 97 ex coupe Wire tuck in progress....


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04-23-2004, 07:11 AM	#6
D See 2 Senior Member Join Date: Sep 2002 Location: Baltimore, MD Age: 25 Posts: 2,401 iTrader: 0 / 0% Ride: '92 Civic CX Rep Power: 39	int.: .006 in. exh.: .007 in. stock specs... i have a feeling the LMA's are bad. It sounds like the cam is "slapping" the rockers arms. I'll pull the valve cover off today and see what i can find out... __________________ Garage: 1992 CX Hatch > Current Money Pit Grave: R.I.P. 1995 Integra GSR R.I.P. 1990 DX Hatch R.I.P. 1990 CRX Si

04-24-2004, 02:28 AM	#8
cws13 Senior Member Join Date: Nov 2002 Location: Athens,GA Posts: 484 iTrader: 0 / 0% Rep Power: 19	Ditto, new one on me. I'd like to know what it turns out to be. Good luck. __________________ 1320 Motorsports Athens,GA <a href=\'http://www.1320motorsports.com\' target=\'_blank\'>1320 MOTORSPORTS</a>

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Can a Lost Motion Assembly go bad?