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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 07-05-2009, 08:32 PM   #1
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Head

so i might pick up a head from a 2.3 viggen from someone on SC. He says it needs new exhaust valves and guides. What im tryin to figure out is, will t5 valves work with a t7 head or no. And if not am i just better finding a different head than paying 500 dollars in valves and guides or is there somewhere i can finder cheaper ones than eeuroparts

this is going to be going on to a b234 not the t7 engine if that matters at all
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Old 07-05-2009, 08:48 PM   #2
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IIRC the T7 valve stems are smaller then the T5 units. This is in part why the T7 head flows better. I would say T5 valves are not compatible in a T7 head.
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Old 07-05-2009, 09:02 PM   #3
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ditto
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Old 07-06-2009, 10:40 AM   #4
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I would just find a good looking T7 head from a junkyard. And I also suggest milling it too.
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can be prone to failure due to increased localized stresses in the hole penetrations
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Old 07-06-2009, 04:38 PM   #5
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so far i think i have only seen one 99+ saab at a junk yard near me and that was liek a year ago. i will need to go exploring junkyards all around

thanks for the help guys
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Old 07-06-2009, 04:41 PM   #6
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Around here, c900 have gotten more scarce and the 9-3s and 9-5s are popping up more and more.
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can be prone to failure due to increased localized stresses in the hole penetrations
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Old 07-06-2009, 08:04 PM   #7
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Around here, c900 have gotten more scarce and the 9-3s and 9-5s are popping up more and more.
Move to Wisconsin... Theres only c900's here. Zilch for NG900's and OG9-3.
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Old 07-07-2009, 05:50 AM   #8
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I would just find a good looking T7 head from a junkyard. And I also suggest milling it too.

x2 and have new seals installed at the same time.
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Old 07-07-2009, 07:58 AM   #9
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It's not that bad in WI. In Milwaukee theres quite a few.
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Old 07-08-2009, 05:42 PM   #10
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Are the B235R exhaust valves not the same as all T7? I remember Nick quoting a disgusting price on those Nimonium Alloy valves.
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