I've replaced everything as far as the manifolds I've redone my gaskets head gaskets I have an issue I have a EGR valve that I just recently purchased but when I put my finger over the hole that leads to the intake manifold as far as the upper intake manifold the car will shut off if I put the valve back on the car will shut off but as long as I leave the valve off it will continue to run but very at an excessive rate so I'm thinking that somewhere within the upper intake manifold that it might be clogged and this is why I'm getting the shutdown I replaced all O2 sensors I just want to know what your intake is as far as me replacing the EGR valve and when I put my finger all the valve back on the car cuts off and I have a 2004 Impala 3.8
Hey guys, Steve here. I use your videos often for repairing GM 3800 Series II engines. Generally, I consult licensed mechanics to diagnose these problems, then I do the repairs myself. On my 1998 Buick LeSabre Custom, I've had a lot of issues with the intake system. When I got the car, I had NO pressure in the cooling system, and I had some overheating issues. The upper and lower intake manifold gaskets were replaced. It ran good for a while, then I started burning coolant. It wasn't going into the crank case like before, so I had some diagnostics run. I'm now in the process of replacing the upper plenum. I don't see how this plastic manifold can possibly allow coolant into the cylinders. Am I doing the right repair?
Steven Sheldon It is a common problem for these manifolds to crack and allow coolant into the cylinder. I have seen 3.8's hydro lock from coolant in the cylinder. You can also look at your plugs and see if they look clean from burning coolant.
That "Tube" that your not sure what its for... Is run up to the PCV that is mounted there at that end of the Plenum. There is a cap that twists on and a spring that holds it down against the o-ring to keep it sealed. Ive seen them come apart without the tube unattached and that end of the intake will be soaked in "blow-by" oil. Its purpose is to move that into the middle of the plenum to spread it around all cylinders. It works pretty well to. I have a 95 Bonny that eats these plenums. I've installed the new Stove pipe on the lower intake and it still melts the vinyl that goes around it. Ive been lucky. First sign of the white billowing cloud and I investigate it. What can I do about that? Great engine. 340K miles. I just fix it when it breaks something. I have not touched the internals of it. Just the plenum and every accessory that it has.
2000 regal here..68 thousand..there is small signs of oil in the valleys of engine..thought is was front valve cover..but shop said. Manifold starting to leak great engines besides this tho huh?
anthony guay It is very important....VERY IMPORTANT.....that you, ( A) either replace your PCV and O-ring or ( B ) remove your old one and place it in the new plenum. Its not mentioned in the video. If you don't there is a real danger of building excessive pressure in your engine causing gasket and seal failure within a 100 or so miles. $$$ The telltale sign is a whistling noise coming from your engine. The pressure is so great, you will not be able to remove your oil filler cap. This is when you start popping oil pan gaskets and crank seals, did I mention your brand new plenum. Hope this help. PS it is located under the pressure sensor.
Choosen One yeah i found it installed then took it out and smashed up the impala so glad that pos is gone replaced it with a kia rio believe it or not ive had zero probs in 80 grand on the kia damn chevy every other day
Great car when they run but nightmare to work on. lots of aluminum and plastic, prone to leaks, fire, frequent maintenance, BCM and security issues make it almost undrivable after 20 years, deceptively plush and fast so you want to keep it running but the headache and heartache of troubleshooting every problem adds up to collective years of cussing.. I'll never own another Chevy or GMC unless it's a '96 pickup
Same engine is in both FWD and RWD. Its the same transmission internally also. One is Longitudinal. Both need to get the upgrades when its time to rebuild them. Great engines either way.
So you soaked the throttle body with the MAF sensor still installed? Bad idea.
Great Video Very Informational And Easy To Follow Thanks
Were vacuum lines leaving the throttle body broke in this removal? I ask because they were there at first but we never saw them removed.
how tf you timeskip while removing parts?.. Thats how people miss stuff
I've replaced everything as far as the manifolds I've redone my gaskets head gaskets I have an issue I have a EGR valve that I just recently purchased but when I put my finger over the hole that leads to the intake manifold as far as the upper intake manifold the car will shut off if I put the valve back on the car will shut off but as long as I leave the valve off it will continue to run but very at an excessive rate so I'm thinking that somewhere within the upper intake manifold that it might be clogged and this is why I'm getting the shutdown I replaced all O2 sensors I just want to know what your intake is as far as me replacing the EGR valve and when I put my finger all the valve back on the car cuts off and I have a 2004 Impala 3.8
I moustache you guys a question, what brand moustache wax do you use? 👍
😂
Hey guys, Steve here. I use your videos often for repairing GM 3800 Series II engines. Generally, I consult licensed mechanics to diagnose these problems, then I do the repairs myself. On my 1998 Buick LeSabre Custom, I've had a lot of issues with the intake system. When I got the car, I had NO pressure in the cooling system, and I had some overheating issues. The upper and lower intake manifold gaskets were replaced. It ran good for a while, then I started burning coolant. It wasn't going into the crank case like before, so I had some diagnostics run. I'm now in the process of replacing the upper plenum. I don't see how this plastic manifold can possibly allow coolant into the cylinders. Am I doing the right repair?
Steven Sheldon It is a common problem for these manifolds to crack and allow coolant into the cylinder. I have seen 3.8's hydro lock from coolant in the cylinder. You can also look at your plugs and see if they look clean from burning coolant.
I have a 3800 gm 3,8 in a Buick Lacrosse 2006.. do I need to take the manifold off to change the plugs?
That "Tube" that your not sure what its for... Is run up to the PCV that is mounted there at that end of the Plenum. There is a cap that twists on and a spring that holds it down against the o-ring to keep it sealed. Ive seen them come apart without the tube unattached and that end of the intake will be soaked in "blow-by" oil. Its purpose is to move that into the middle of the plenum to spread it around all cylinders. It works pretty well to. I have a 95 Bonny that eats these plenums. I've installed the new Stove pipe on the lower intake and it still melts the vinyl that goes around it. Ive been lucky. First sign of the white billowing cloud and I investigate it. What can I do about that? Great engine. 340K miles. I just fix it when it breaks something. I have not touched the internals of it. Just the plenum and every accessory that it has.
2000 regal here..68 thousand..there is small signs of oil in the valleys of engine..thought is was front valve cover..but shop said. Manifold starting to leak great engines besides this tho huh?
@@edubb2491 You are probably right about the valve covers leaking. There's No Oil passages in the plastic plenum to cause a leak.
anthony guay
It is very important....VERY IMPORTANT.....that you, ( A) either replace your PCV and O-ring or ( B ) remove your old one and place it in the new plenum. Its not mentioned in the video. If you don't there is a real danger of building excessive pressure in your engine causing gasket and seal failure within a 100 or so miles. $$$ The telltale sign is a whistling noise coming from your engine. The pressure is so great, you will not be able to remove your oil filler cap. This is when you start popping oil pan gaskets and crank seals, did I mention your brand new plenum.
Hope this help.
PS it is located under the pressure sensor.
looking for a Saturn 3.0 video on changing the intake 2004
good job. you have the best video on this project
Thank you for this video.
A proffessional mechanic would have blown high pressure air around the intake to remove debris before removing anything.
please do a vid on pcv valve location and install on this engine
Dude, it's easy as cake.
yea, easy.
Choosen One yeah i found it installed then took it out and smashed up the impala so glad that pos is gone replaced it with a kia rio believe it or not ive had zero probs in 80 grand on the kia damn chevy every other day
MrAsus3571 nice, I'm thinking of selling my impala for stick shift car, more fun. I missed my stick shift
The plastic tube on the gasket is for the pcv valve. I think it's stupid. Doing this on my buick lacrosse 09 same issues
Great car when they run but nightmare to work on. lots of aluminum and plastic, prone to leaks, fire, frequent maintenance, BCM and security issues make it almost undrivable after 20 years, deceptively plush and fast so you want to keep it running but the headache and heartache of troubleshooting every problem adds up to collective years of cussing.. I'll never own another Chevy or GMC unless it's a '96 pickup
good video thanks
well yeah, that's a sideways motor... show it on a 3.8 v6 from a firebird or camaro....
RWD!
Same engine is in both FWD and RWD. Its the same transmission internally also. One is Longitudinal. Both need to get the upgrades when its time to rebuild them. Great engines either way.
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