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Author Topic: aaz valves and srings  (Read 3968 times)

March 24, 2011, 06:23:43 am

paolomarks

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aaz valves and srings
« on: March 24, 2011, 06:23:43 am »
Hello, I've got an AAZ out of a 96 golf(Canada)  is it true that the AAZ only had outer valve springs? Mine have no inners.  If needed can I replace them with inners from a 1.6 NA  mechanical head?  Thanks in advance, Paolo.
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Reply #1March 24, 2011, 11:08:20 am

Thezorn

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Re: aaz valves and srings
« Reply #1 on: March 24, 2011, 11:08:20 am »
Mines a 93 AAZ and it has 2 valve springs per valve.
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Compounded 93 AAZ
Reply #2March 24, 2011, 03:22:35 pm

Mark(The Miser)UK

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Re: aaz valves and srings
« Reply #2 on: March 24, 2011, 03:22:35 pm »
2 springs and identical to the 1.6td ones & n/a ;D
« Last Edit: March 25, 2011, 07:05:17 am by Mark(The Miser)UK »
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Mark-The-Miser-UK

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Reply #3March 25, 2011, 09:01:45 pm

paolomarks

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Re: aaz valves and srings
« Reply #3 on: March 25, 2011, 09:01:45 pm »
thanks, for the replies.  Wonder why the PO removed the inner springs?  Any advantage to doing so?  Paolo
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Reply #4March 25, 2011, 09:42:24 pm

Vincent Waldon

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Re: aaz valves and srings
« Reply #4 on: March 25, 2011, 09:42:24 pm »
Both my AAZ heads only have single springs.
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Vince

Edmonton, Alberta, Canada
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Gone but not forgotten: 1969/1971 Beetles, 1969/1974 Westies, 1979 Rabbit, 1986 TD Jetta, 1992 gas Jetta, 1994 TD Jetta
Reply #5March 25, 2011, 09:53:37 pm

rabbitman

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Re: aaz valves and srings
« Reply #5 on: March 25, 2011, 09:53:37 pm »
Don't some AAZs have 7mm valves and some 8mm? If that's right maybe the lighter 7mm ones don't need as much spring strength to return it.
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Reply #6March 25, 2011, 10:03:36 pm

rallydiesel

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Re: aaz valves and srings
« Reply #6 on: March 25, 2011, 10:03:36 pm »
I have a head with 8mm stems and single springs.
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Reply #7March 26, 2011, 08:14:19 am

Mark(The Miser)UK

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Re: aaz valves and srings
« Reply #7 on: March 26, 2011, 08:14:19 am »
Reading up; AAZ had inner and outer springs, up to 1997ish, then had only one spring, whilst the 1Z and AHU began/carried on the dual spring setup. Code was 028 109 623 A, outer, and 028 109 633A inner, later the single spring was 028 109 623B
Interestingly it seems the AAZ continued to be issued with the dual spring 'carrier'
Finally ABA,and AAC came along with the 028 109 623 'C' outer, no inner
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Mark-The-Miser-UK

"There's nothing like driving past a bonfire and then realising; its my car on fire!"

I'm not here to help... I'm here to Pro-Volke"

Be like meeee: drive a Quantum TD
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Reply #8March 26, 2011, 06:22:36 pm

paolomarks

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Re: aaz valves and srings
« Reply #8 on: March 26, 2011, 06:22:36 pm »
Hey, you guys with the newer AAZ's with only one spring, I'm wondering if your springs have the lower "Carrier" to center and support the spring, like the 1.6's have. My '96 just has the top "carrier", which by the way is the exact same part as the 2 spring models. Why did VW switch to the one spring.?  Don't 2 dissimiler springs reduce vibration because their differing vibrational frequencies tend to cancel out unwanted vibration?.  What do you guys think.?  Paolo
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Reply #9March 26, 2011, 06:46:01 pm

rallydiesel

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Re: aaz valves and srings
« Reply #9 on: March 26, 2011, 06:46:01 pm »
Mine has a top and bottom spring plate. Wouldn't the spring wear into the aluminum head if there was no lower plate?
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2006 Jetta TDI - gtb1749v, Malone 2, Frank's Titan 2 cam, VR6 clutch....
1991 Jetta TD - sold :(
2001 Golf TDI - Son's
1981 Rabbit - BEW tdi swap project

"ONCE YOU GO CLACK, YOU NEVER GO BACK"
Reply #10March 27, 2011, 07:37:56 am

paolomarks

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Re: aaz valves and srings
« Reply #10 on: March 27, 2011, 07:37:56 am »
Has anyone ever seen a single spring set up without a lower "carrier"?  This is how I found mine, but I have no idea what the PO did.  Thanks, Paolo
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Reply #11March 27, 2011, 10:26:14 am

Vincent Waldon

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Re: aaz valves and srings
« Reply #11 on: March 27, 2011, 10:26:14 am »
Yup... that's how my single-spring heads are.

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Vince

Edmonton, Alberta, Canada
2001 silver TDI Jetta Malone Stage 1.5 , 2001 blue TDI Jetta SBIII 216s Malone Stage 3, 1970 Bay Window bus

Gone but not forgotten: 1969/1971 Beetles, 1969/1974 Westies, 1979 Rabbit, 1986 TD Jetta, 1992 gas Jetta, 1994 TD Jetta
Reply #12March 27, 2011, 04:45:24 pm

paolomarks

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Re: aaz valves and srings
« Reply #12 on: March 27, 2011, 04:45:24 pm »
Great!, Thanks for the help.  Question still remains, though , why would VW switch from  a 2 spring set up to the single.?  Cheaper?  Less reciprocating mass?. 
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