Carbon buildup under intake manifold ???
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Intermediate
Joined: May 2013
Posts: 47
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Carbon buildup under intake manifold ???
I took off my intake manifold ( was a struggle in itself ) to find when I went to clean it up there was a huge solid carbon buildup in something that resembles a catch can riveted to the bottom
Of my 1969 l46's intake manifold . What is this ? Is this normal ? It's so solid it's very difficult to remove, anyone ever take this thing off ? Because it doesn't look like it could go back on if it comes off. Someone help!
Of my 1969 l46's intake manifold . What is this ? Is this normal ? It's so solid it's very difficult to remove, anyone ever take this thing off ? Because it doesn't look like it could go back on if it comes off. Someone help!
Drifting
Joined: Jul 2004
Posts: 1,695
Likes: 65
From: Kissimmee fl
Finalist 2021 C3 of the Year - Modified
2017 C3 of Year Finalist
Cruise-In VIII Veteran
St. Jude Donor '07
There is a heat shield attached with drive rivits on the underside of the intake. The oil that splashes between the heat shield and the intake gets baked from the heat of the crossover passage.
What you are seeing is not unusual. It can be removed to clean things up, and as you stated, it will most likely not go back on. Most new intakes do not have the shield.
Depending on where you live, you can use the block-off plates when you reinstall the intake if you do not need the choke. Also, if you choose to use the block-off plates, be sure to wire the heat riser flapper in the passenger side exhaust pipe in the open position.
What you are seeing is not unusual. It can be removed to clean things up, and as you stated, it will most likely not go back on. Most new intakes do not have the shield.
Depending on where you live, you can use the block-off plates when you reinstall the intake if you do not need the choke. Also, if you choose to use the block-off plates, be sure to wire the heat riser flapper in the passenger side exhaust pipe in the open position.
Last edited by c69vete; Jul 8, 2014 at 11:25 AM.
Thread Starter
Intermediate
Joined: May 2013
Posts: 47
Likes: 0
There is a heat shield attached with drive rivits on the underside of the intake. The oil that splashes between the heat shield and the intake gets baked from the heat of the crossover passage.
What you are seeing is not unusual. It can be removed to clean things up, and as you stated, it will most likely not go back on. Most new intakes do not have the shield.
Depending on where you live, you can use the block-off plates when you reinstall the intake if you do not need the choke. Also, if you choose to use the block-off plates, be sure to wire the heat riser flapper in the passenger side exhaust pipe in the open position.
What you are seeing is not unusual. It can be removed to clean things up, and as you stated, it will most likely not go back on. Most new intakes do not have the shield.
Depending on where you live, you can use the block-off plates when you reinstall the intake if you do not need the choke. Also, if you choose to use the block-off plates, be sure to wire the heat riser flapper in the passenger side exhaust pipe in the open position.
Are safe to sandblast to remove the old paint etc.
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Scrap off what you can get to then get it hot tanked at a machine shop. Might have to run it through a couple times. If it has paint or stains on the exposed surface glass bead or soda blast it, don't use regular media. A lot of times the same machine shop you get it hot tanked at will have the glass bead blaster. Make sure you get all the media out between the heat shield and intake (pressure washer works good). You can remove it and get replacement rivets but I have had good success leaving it on.
Thread Starter
Intermediate
Joined: May 2013
Posts: 47
Likes: 0
Scrap off what you can get to then get it hot tanked at a machine shop. Might have to run it through a couple times. If it has paint or stains on the exposed surface glass bead or soda blast it, don't use regular media. A lot of times the same machine shop you get it hot tanked at will have the glass bead blaster. Make sure you get all the media out between the heat shield and intake (pressure washer works good). You can remove it and get replacement rivets but I have had good success leaving it on.
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
