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which valve?
Is this an intake or exhaust valve?
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Current Stable: Black 07 Porsche 987 Cayman S: Long-Tube Headers; FabSpeed Exhaust; VividRacing ECU Tune; IPD Plenum; 997GT3 Throttle Body. Blue 1983 Porsche 928S. 1985.5 Porsche 944 Rat Rod. 2011 Acura MDX. 2008 Mazda 3. Gone But Not Forgotten:Garnet Red 86 Porsche 951("The Purple Pig"). Alpine White 83 Porsche 944 ("Alpine Wolf"). Guards Red 84 Porsche 944. |
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07-03-2006, 01:53 PM
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Intakes are bigger than exhausts.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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07-03-2006, 02:21 PM
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Registered
Join Date: Nov 2005
Location: Visalia, Ca
Posts: 1,327
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Hey CJ is that small gap between the Intake and Exhaust valve smooth or bumpy. I used a degreeser on my head to get rid of the carbon and after sitting it looked like it had eaten the carbon and turned into a scaley foam. If you're is a lil pitted then im kool, if not that i guess that scale was the aluminum being removed by the degreeser.
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Jaime O. Thank god I crashed or i would never have owned a porsche 83 944 daily driver (clutch and tt time) 85 325e BMW T-boned R.I.P. |
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07-04-2006, 12:57 AM
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Certified Rennwerker
Join Date: Oct 2002
Location: Kansas
Posts: 1,906
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Why is that valve so clean looking? New? Looks like a new one just installed.
Dal
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PCA " I've been everywhere, done everything......just can't remember any of it!" 
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07-04-2006, 05:53 AM
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Back from Beyond
Join Date: Nov 2004
Location: Alberta, Canada
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Gloves? Whenever I have to work on my car, the gloves come off... So to speak.
It's an intake valve.
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'88 944 Auto - project, kinda '87 944 Auto - died saving my wife '84 944 5SP - crushed under shop roof during snow storm All others GONE! |
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07-04-2006, 09:09 AM
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Join Date: Mar 2003
Location: West Haven, Connecticut
Posts: 812
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Get your toof brush out and start cleaning!
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-2002.5 GTI VR6 24V 6SPD -Kalahari Beige 89 Porsche 944S2 -87 VW GTI 1.8 16v -2007 Ford PIMP(free)star ...company car.... -1999.5 Jetta VR6 |
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07-04-2006, 09:32 AM
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Well, I am sending out the head to get machined/cleaned and possibly ported (with a new intake valve, of course). I think whatever process the shop has to clean the head would be much more effective than toothbrush/degreaser
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Current Stable: Black 07 Porsche 987 Cayman S: Long-Tube Headers; FabSpeed Exhaust; VividRacing ECU Tune; IPD Plenum; 997GT3 Throttle Body. Blue 1983 Porsche 928S. 1985.5 Porsche 944 Rat Rod. 2011 Acura MDX. 2008 Mazda 3. Gone But Not Forgotten:Garnet Red 86 Porsche 951("The Purple Pig"). Alpine White 83 Porsche 944 ("Alpine Wolf"). Guards Red 84 Porsche 944. |
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07-04-2006, 10:35 AM
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Yes that is a intake valve. Yes the shop will have a very good way of cleaning them, usually a hot bath of some really really crazy chemicals. It will come back to you lookin brand new ;-) A nice Port and polish should help alot too since the head is one of the biggest restrictions with making power on these engines
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1986 951, Stock for now. ]87 924S Gaurds red- SOLD after 11 years of ownership |
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07-04-2006, 11:28 AM
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Would you recommend replacing the valve springs as well?
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Current Stable: Black 07 Porsche 987 Cayman S: Long-Tube Headers; FabSpeed Exhaust; VividRacing ECU Tune; IPD Plenum; 997GT3 Throttle Body. Blue 1983 Porsche 928S. 1985.5 Porsche 944 Rat Rod. 2011 Acura MDX. 2008 Mazda 3. Gone But Not Forgotten:Garnet Red 86 Porsche 951("The Purple Pig"). Alpine White 83 Porsche 944 ("Alpine Wolf"). Guards Red 84 Porsche 944. |
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07-05-2006, 07:33 AM
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Registered
Join Date: Mar 2003
Location: West Haven, Connecticut
Posts: 812
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Aftermarket springs or OEM?
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-2002.5 GTI VR6 24V 6SPD -Kalahari Beige 89 Porsche 944S2 -87 VW GTI 1.8 16v -2007 Ford PIMP(free)star ...company car.... -1999.5 Jetta VR6 |
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07-05-2006, 08:30 AM
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Ok, how about this:
Talk to me about valve springs 
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Current Stable: Black 07 Porsche 987 Cayman S: Long-Tube Headers; FabSpeed Exhaust; VividRacing ECU Tune; IPD Plenum; 997GT3 Throttle Body. Blue 1983 Porsche 928S. 1985.5 Porsche 944 Rat Rod. 2011 Acura MDX. 2008 Mazda 3. Gone But Not Forgotten:Garnet Red 86 Porsche 951("The Purple Pig"). Alpine White 83 Porsche 944 ("Alpine Wolf"). Guards Red 84 Porsche 944. |
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07-05-2006, 08:41 AM
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Join Date: Mar 2003
Location: West Haven, Connecticut
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Are you getting tricked out cams?
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-2002.5 GTI VR6 24V 6SPD -Kalahari Beige 89 Porsche 944S2 -87 VW GTI 1.8 16v -2007 Ford PIMP(free)star ...company car.... -1999.5 Jetta VR6 |
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07-05-2006, 08:55 AM
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What makes you think that only one valve is bent?
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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07-05-2006, 08:59 AM
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Join Date: Mar 2003
Location: West Haven, Connecticut
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Well Id get new springs if you were getting a cam that required it. Other than that I dont see much point unless youre going to be revving like a maniac. Obviously you dont want to float valves in the '44s
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-2002.5 GTI VR6 24V 6SPD -Kalahari Beige 89 Porsche 944S2 -87 VW GTI 1.8 16v -2007 Ford PIMP(free)star ...company car.... -1999.5 Jetta VR6 |
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07-05-2006, 09:04 AM
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You will float valves should you go over the rev limiter or about 7,200 rpm. Usually happens on a down shift.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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07-05-2006, 09:16 AM
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Hugh - I am not positive that only one valve is bent. Only one valve APPEARS to be bent. I suppose I will find out once I bring the head to a shop to be machined/resurfaced/cleaned.
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Current Stable: Black 07 Porsche 987 Cayman S: Long-Tube Headers; FabSpeed Exhaust; VividRacing ECU Tune; IPD Plenum; 997GT3 Throttle Body. Blue 1983 Porsche 928S. 1985.5 Porsche 944 Rat Rod. 2011 Acura MDX. 2008 Mazda 3. Gone But Not Forgotten:Garnet Red 86 Porsche 951("The Purple Pig"). Alpine White 83 Porsche 944 ("Alpine Wolf"). Guards Red 84 Porsche 944. |
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07-05-2006, 12:05 PM
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CJ...just for future reference, you can look in the intake hole and see a valve stem...that will be the intake valve. If you look in the exhaust port, you'll see the other valve stem...of course that will be the exhaust valve. That's the easiest way to tell the difference.
I think the valve spring question depends on how you drive your car. For the car I'm working on....well let's just say she better not float a valve. If you plan to autox, then maybe something to consider but there are a lot of people here that drive them daily with no problems....just don't overrev the engine and the springs you have should be fine as long as they are in spec which they probably are. The machine shop should let you know if they are not.
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Tom 1990 944S2 Cabriolet 2002 Chevy Silverado 2500HD 2003 Maroon Ford F350 dually |
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07-05-2006, 12:37 PM
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"Take" the head NOT "bring".
You take it there and bring it here. Examples: Take the head with you. Take the head to the machine shop. Bring the head when you come over to my machine shop. Did you bring the head with you? Did you take the head with you? (The two sentences above is one of few exceptions where both words can be used. Or is it. The first sentence is used at the destination, the second as a question anywhere but at the destination.) Don't get me started on "got".
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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07-05-2006, 12:42 PM
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I don't get you, SoCal. This is a car forum, not the grammar police. Save that stuff for the "Eats, Shoots & Leaves" fan forum. I hold a BA in English and will have completed a Master's in English within the year. I save my formal writing for the 70+ page theses that I have to write twice a year. Forgive me for thinking I can write informally on an automotive technical forum.
So, pray tell, what is the purpose of pointing out bad grammar when it has nothing to do with the topic of a thread? To attempt to impress people? To make others feel bad? Your help in the automotive field is much appreciated, Hugh, but please save me the lectures.
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Current Stable: Black 07 Porsche 987 Cayman S: Long-Tube Headers; FabSpeed Exhaust; VividRacing ECU Tune; IPD Plenum; 997GT3 Throttle Body. Blue 1983 Porsche 928S. 1985.5 Porsche 944 Rat Rod. 2011 Acura MDX. 2008 Mazda 3. Gone But Not Forgotten:Garnet Red 86 Porsche 951("The Purple Pig"). Alpine White 83 Porsche 944 ("Alpine Wolf"). Guards Red 84 Porsche 944. |
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07-05-2006, 12:58 PM
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Oh geesh! A BA in English! You should know better. Then the deplorable state of the education system could be to blame. Then maybe not.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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07-05-2006, 01:08 PM
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2007 Porsche Cayman S
The Viridian Falcon
SOLD! -- The Purple Pig
SOLD! -- Mighty Mouse
SOLD!! -- Alpine Wolf
1983 Porsche 944 2.5 liter
1987 Porsche 924S 2.5 modified
