Clearance piston to valve

ghost · 06-14-2015, 01:30 PM

Hi
I need information. On my B/SA 1995 Camaro with LT1. At 101.5 timing, the valve clearance to piston is .018 int and .053 on exh. It is too tight or is normal. If i back the cam at 106, i have 32 int and 36 exh. All with .039 head gasket. what you do with this?

Thank for your help

ss3011 · 06-14-2015, 02:20 PM

How are you measuring that ? Light checking spring, or clay, do you have a welded lifter ?

ghost · 06-14-2015, 03:10 PM

This is Roller Hydro. but I checked the lash with light spring and solid roller lifter. but i have same result with light spring and roller hydro.

Mark Lewis · 06-14-2015, 03:35 PM

what is the total deck, head gasket and piston depth?
Also what is cam ground on?

Joe DeMarzo · 06-14-2015, 04:13 PM

Mark you have a pm.

ghost · 06-14-2015, 04:45 PM

deck is .015 gasket .039 total .054.

but i want know?

Have you ever seen this in stock eliminator for a hydraulic roller cam?

Rich Biebel · 06-14-2015, 06:36 PM

Late model LT-1 minimum total deck with gasket is.062" IIRC. Your short .008" and would fail a tear down. I had one and built my own engine and had plenty of clearance with CP pistons and a Bullet cam. That cam was pretty aggressive so it seems odd to me you would have so little clearance.

Lee Valentine · 06-14-2015, 07:21 PM

Same thing I was thinking Rich.

ghost · 06-14-2015, 07:52 PM

I run with with Fel-Pro 9966 pt the thickness is .049 not .039 (it is my mistake) But it changes nothing to my question.

Rich ... you don't need to swear at me

Rich Biebel · 06-14-2015, 07:52 PM

It's been quite a while since I had that LT-1 Stocker Lee but I do recall doing that engine and being real happy I did not have to worry about a tight P-V issue. Still wish I had one as they are great fun to drive. Not fun to work on! Swear at you ? I don't have a clue as to what that statement means.

06-14-2015, 01:30 PM	#1
ghost Junior Member Join Date: Oct 2012 Posts: 81 Likes: 0 Liked 16 Times in 11 Posts	Clearance piston to valve Hi I need information. On my B/SA 1995 Camaro with LT1. At 101.5 timing, the valve clearance to piston is .018 int and .053 on exh. It is too tight or is normal. If i back the cam at 106, i have 32 int and 36 exh. All with .039 head gasket. what you do with this? Thank for your help

06-14-2015, 02:20 PM	#2
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 908 Likes: 70 Liked 238 Times in 113 Posts	Re: Clearance piston to valve How are you measuring that ? Light checking spring, or clay, do you have a welded lifter ?

06-14-2015, 03:10 PM	#3
ghost Junior Member Join Date: Oct 2012 Posts: 81 Likes: 0 Liked 16 Times in 11 Posts	Re: Clearance piston to valve This is Roller Hydro. but I checked the lash with light spring and solid roller lifter. but i have same result with light spring and roller hydro.

06-14-2015, 03:35 PM	#4
Mark Lewis Member Join Date: Apr 2006 Posts: 344 Likes: 63 Liked 207 Times in 44 Posts	Re: Clearance piston to valve what is the total deck, head gasket and piston depth? Also what is cam ground on?

06-14-2015, 04:13 PM	#5
Joe DeMarzo Senior Member Join Date: Oct 2002 Location: Mahopac, NY Posts: 666 Likes: 48 Liked 113 Times in 9 Posts	Re: Clearance piston to valve Mark you have a pm. __________________ Joe DeMarzo 1317 STK

06-14-2015, 04:45 PM	#6
ghost Junior Member Join Date: Oct 2012 Posts: 81 Likes: 0 Liked 16 Times in 11 Posts	Re: Clearance piston to valve deck is .015 gasket .039 total .054. but i want know? Have you ever seen this in stock eliminator for a hydraulic roller cam?

06-14-2015, 06:36 PM	#7
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,314 Likes: 25 Liked 544 Times in 213 Posts	Re: Clearance piston to valve Late model LT-1 minimum total deck with gasket is.062" IIRC. Your short .008" and would fail a tear down. I had one and built my own engine and had plenty of clearance with CP pistons and a Bullet cam. That cam was pretty aggressive so it seems odd to me you would have so little clearance. __________________ Rich Biebel S/C 1479 Stock 147R Last edited by Rich Biebel; 06-14-2015 at 06:40 PM.

06-14-2015, 07:21 PM	#8
Lee Valentine Senior Member Join Date: May 2004 Location: Brookfield, CT Posts: 708 Likes: 13 Liked 319 Times in 68 Posts	Re: Clearance piston to valve Same thing I was thinking Rich. __________________ Lee Valentine 1661 STK

06-14-2015, 07:52 PM	#9
ghost Junior Member Join Date: Oct 2012 Posts: 81 Likes: 0 Liked 16 Times in 11 Posts	Re: Clearance piston to valve I run with with Fel-Pro 9966 pt the thickness is .049 not .039 (it is my mistake) But it changes nothing to my question. Rich ... you don't need to swear at me

06-14-2015, 07:52 PM	#10
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,314 Likes: 25 Liked 544 Times in 213 Posts	Re: Clearance piston to valve It's been quite a while since I had that LT-1 Stocker Lee but I do recall doing that engine and being real happy I did not have to worry about a tight P-V issue. Still wish I had one as they are great fun to drive. Not fun to work on! Swear at you ? I don't have a clue as to what that statement means. __________________ Rich Biebel S/C 1479 Stock 147R Last edited by Rich Biebel; 06-14-2015 at 07:57 PM.