C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1986 smog pump bracket

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Old Mar 27, 2012 | 07:01 PM
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Default 1986 smog pump bracket

What material is the smog pump bracket made of? Steel? Aluminum? I have a tiny crack that i would like to weld up but my setup is for steel. I will be powder coating the part afterwards.
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Old Mar 27, 2012 | 07:19 PM
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All of the accessory brackets on the front of the L98 motors are cast aluminum. Only the small tubular support brackets at the rear of the alternator and A/C compressor are steel.

You "can" weld aluminum with a MIG welder but you need pure Argon gas and a spool feeder at the gun end for aluminum welding wire. Probably just as easy (and cheaper) to take it to a welding shop.
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Old Mar 27, 2012 | 07:20 PM
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Aluminum I just refinished mine.Find one on e-bay for a few bucks,I've found so many parts there, cheap.

Last edited by caddyboy84; Mar 27, 2012 at 07:22 PM.
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Old Dec 6, 2014 | 03:12 AM
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Originally Posted by c4cruiser
All of the accessory brackets on the front of the L98 motors are cast aluminum. Only the small tubular support brackets at the rear of the alternator and A/C compressor are steel.

You "can" weld aluminum with a MIG welder but you need pure Argon gas and a spool feeder at the gun end for aluminum welding wire. Probably just as easy (and cheaper) to take it to a welding shop.
I noticed some L98 motors have a tubular support bracket on the front
of the smog pump bracket similar like the one at the rear.

http://www.ebay.com/itm/89-C4-CORVETTE-L98-SMOG-PUMP-FRONT-SUPPORT-ROD-VGC-/170541475433?pt=Motors_Car_Truck_Parts_Accessories&hash=item27b5106669&vxp=mtr
My 1988 c4 does not have this front rod.
Why was this put on there?
Did all the c4 Corvettes had this front support bracket?
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Old Dec 6, 2014 | 05:18 AM
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See if a magnet sticks to it.

My 85 is cast iron.

What ever you have you would probably be better off taking it to a welding shop. Or probably cheaper, just find one here in the for sale section.

Cast iron is tricky to weld. It expands and contracts differently than regular steel when heated and cooled. If not done right the part will usually crack at the weld as it cools. If it doesn't there is a good chance it will down the road.

If it's aluminum and you don't have a tig or a spool gun it's a big aggravating waste of time. (been there, tried it with a mig ) A mig doesn't like to push the soft wire through the lead.
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Old Dec 6, 2014 | 10:06 AM
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Originally Posted by Mark8801
See if a magnet sticks to it.

My 85 is cast iron.

What ever you have you would probably be better off taking it to a welding shop. Or probably cheaper, just find one here in the for sale section.

Cast iron is tricky to weld. It expands and contracts differently than regular steel when heated and cooled. If not done right the part will usually crack at the weld as it cools. If it doesn't there is a good chance it will down the road.

If it's aluminum and you don't have a tig or a spool gun it's a big aggravating waste of time. (been there, tried it with a mig ) A mig doesn't like to push the soft wire through the lead.
- put a magnet to it.

on my 85, it's also cast iron, whereas my 90 is aluminum. not sure when the change over was, but I'd guess, it may be an iron head/aluminum head thing. as to the OP's 86, it would be interesting to know if he has an iron head or aluminum head L98, and if he has an aluminum or iron bracket.

Last edited by Joe C; Dec 6, 2014 at 10:11 AM.
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Old Dec 6, 2014 | 10:10 AM
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Originally Posted by lukipuki
I noticed some L98 motors have a tubular support bracket on the front
of the smog pump bracket similar like the one at the rear.

89 C4 Corvette L98 Smog Pump Front Support Rod VGC | eBay

My 1988 c4 does not have this front rod.
Why was this put on there?
Did all the c4 Corvettes had this front support bracket?
my FWIW, 90 has a front support rod.

edit - daaaaammmmmnnnnn -- just realized this thread is almost 3 years old -

Last edited by Joe C; Dec 6, 2014 at 02:25 PM.
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Old Dec 6, 2014 | 06:21 PM
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Originally Posted by Joe C
my FWIW, 90 has a front support rod.

edit - daaaaammmmmnnnnn -- just realized this thread is almost 3 years old -
I didn't realize it till you posted that!
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