Bolt Information - Intake Plenum 1989
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Intermediate
Joined: Jun 2012
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From: Dania Beach Florida
Bolt Information - Intake Plenum 1989
Can someone tell me the bolt length for the intake Plenum - I have two or three different lengths for each side. Also is there an easier bolt type to replace the stock bolts for the intake plenum???? Does ARP
make of kit for this application???
make of kit for this application???
Team Owner
Joined: Sep 2003
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You mentioned plenum so this is all of the metric M8 hardware. The LIM to cylinder heads are NOT metric and I didn't bother with that information.
http://www.corvettefever.com/techart.../photo_19.html
ARP has packages for nearly everything. There should be no issues if that's what you feel you need but I'd guess they're expensive. Never looked.
Racer
Joined: Nov 2008
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From: Auburndale FL
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basically, you need to fit the bolt lengths to the runner tubes. there are different flange lengths or thickness cast into the air tubes, but in a nutshell, each bolt should have a tad over 5/8" protruding that threads into the plenum or intake. just play around with the bolt placement - the (bolt) lengths should fall into place. the same holds true (5/8") for the two bolts that install from the inner side of the intake.
I've never had an issue with the factory torx bolts, so I cant advise on a replacement.
I've never had an issue with the factory torx bolts, so I cant advise on a replacement.
Last edited by Joe C; Dec 26, 2013 at 12:50 PM.
Le Mans Master
Joined: Aug 2007
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From: WV
I have hex head bolts on my plenum and the runners to intake both.. You can pick these up at Ace Hardward alot cheaper then ARP sells them for..Torx bolts work, but hex is alot better, no chance of stripping the head....
....WW
....WW
Team Owner
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I guess you mean "socket head" and not "hex head" bolts.
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Le Mans Master
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From: WV
I guess the industry doesn't even agree on what to call them..I have seen them called hex head, Allen Hex Socket and hex socket head..Whatever there called , it's the type seen below that I installed in my plenum..WW
http://www.ebay.com/itm/like/380548023815?lpid=82
http://www.ebay.com/itm/6x30mm-Hex-Head-Bolt-Bag-10-/380804400893?pt=Cycling_Parts_Accessories&hash=item58a9b606fd#ht_2284wt_758
http://www.ebay.com/itm/2pcs-M8-x-40-Titanium-Ti-Screw-Bolt-Allen-hex-Socket-Cap-head-Aerospace-Grade-/121242227419?pt=Cycling_Parts_Accessories&hash=item1c3a9992db#ht_1253wt_645
http://www.ebay.com/itm/like/380548023815?lpid=82
http://www.ebay.com/itm/6x30mm-Hex-Head-Bolt-Bag-10-/380804400893?pt=Cycling_Parts_Accessories&hash=item58a9b606fd#ht_2284wt_758
http://www.ebay.com/itm/2pcs-M8-x-40-Titanium-Ti-Screw-Bolt-Allen-hex-Socket-Cap-head-Aerospace-Grade-/121242227419?pt=Cycling_Parts_Accessories&hash=item1c3a9992db#ht_1253wt_645
Last edited by WW7; Dec 26, 2013 at 10:06 PM.
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- 1986 Original Owner -
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Le Mans Master
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From: WV
Le Mans Master
Joined: Aug 2007
Posts: 8,735
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From: WV
As long as you use antiseize you shouldn't have any problems.. Antiseize should be used anytime you put steel into aluminum, unless your going into a waterjacket or oil flow.. Then you should use a RTV sealant that is impervious to coolant and oil...WW
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Wayne, To be honest, I haven't fired it yet! The job turned into a full resto, so I'm still working on getting the underbody cleaned up and painted. I'll be back before long with pics of the whole deal. Hope you're keeping well and happy holidays.