On my 75 1.8 the cat converter has been replaced with a bypass tube but now I want to know if I can safely remove all the EGR stuff (valve and tubes).
What has to be plugged or keeped open. Something to rewire ?
Full Version: Can I remove EGR stuff ?
In my country, Cat converters are not mandatory on old cars and NOX is not mesured neither.
On my 75 1.8 the cat converter has been replaced with a bypass tube but now I want to know if I can safely remove all the EGR stuff (valve and tubes).
What has to be plugged or keeped open. Something to rewire ?
On my 75 1.8 the cat converter has been replaced with a bypass tube but now I want to know if I can safely remove all the EGR stuff (valve and tubes).
What has to be plugged or keeped open. Something to rewire ?
Yes.you can remove it all. You well need to plug the holes in the heads, or leave the tubes and plug or crimp the ends of them.
QUOTE(vsg914 @ Sep 28 2011, 03:42 AM) 
Yes.you can remove it all. You well need to plug the holes in the heads, or leave the tubes and plug or crimp the ends of them.
Except there are no hole in the heads on 1.8L, no air injection.
Plug the vacuum line to the EGR valve, plug the port where the EGR enters the intake tube & plug the outlet on the muffler.
Box it all up and save it or sell it to someone over here that still has to get theirs smogged.
Jim
QUOTE(jcd914 @ Sep 28 2011, 07:41 AM)
QUOTE(vsg914 @ Sep 28 2011, 03:42 AM)
Yes.you can remove it all. You well need to plug the holes in the heads, or leave the tubes and plug or crimp the ends of them.
Except there are no hole in the heads on 1.8L, no air injection.
Plug the vacuum line to the EGR valve, plug the port where the EGR enters the intake tube & plug the outlet on the muffler.
Box it all up and save it or sell it to someone over here that still has to get theirs smogged.
Jim
That sounds even easier ...
No chance the distributor will be fooled ? There is a yellow line going from EGR to distributor
EGR is used to control combustion temperatures. In my rather extensive experiences with late T2s, engines without EGR wipe out heads even faster than those with it. Good rebuilders won't warranty a T4 engine in a bus application if the EGR system is inop. Think about it ...................
The Cap'n
The Cap'n
Thankfully we are not pushing aerodynamically challenged, overweight and underpowered buses around with our little motors.
I would suggest you track down the proper early Heat exchangers and muffler if you are going to remove the system....
The 75/76 heat exchangers retain to much heat under the motor bye directing it forward first....
backdating the HE system has more benefits than just the additonal HP you will obtain...it will make the motor run cooler.
Rich
I would suggest you track down the proper early Heat exchangers and muffler if you are going to remove the system....
The 75/76 heat exchangers retain to much heat under the motor bye directing it forward first....
backdating the HE system has more benefits than just the additonal HP you will obtain...it will make the motor run cooler.
Rich
QUOTE(r_towle @ Sep 28 2011, 02:26 PM)
Thankfully we are not pushing aerodynamically challenged, overweight and underpowered buses around with our little motors.
I would suggest you track down the proper early Heat exchangers and muffler if you are going to remove the system....
The 75/76 heat exchangers retain to much heat under the motor bye directing it forward first....
backdating the HE system has more benefits than just the additonal HP you will obtain...it will make the motor run cooler.
Rich
.....I'm inclined to agree!!
QUOTE(r_towle @ Sep 28 2011, 01:26 PM)
I would suggest you track down the proper early Heat exchangers and muffler if you are going to remove the system....
The 75/76 heat exchangers retain to much heat under the motor bye directing it forward first....
backdating the HE system has more benefits than just the additonal HP you will obtain...it will make the motor run cooler.
Rich
I agree with you but this is quite a big investment. Heat Exchangers, + Muffler + J tubes + L tubes + Hanger. We are talking about 1000 Dollars...
QUOTE(r_towle @ Sep 28 2011, 02:26 PM)
Thankfully we are not pushing aerodynamically challenged, overweight and underpowered buses around with our little motors.
I would suggest you track down the proper early Heat exchangers and muffler if you are going to remove the system....
The 75/76 heat exchangers retain to much heat under the motor bye directing it forward first....
backdating the HE system has more benefits than just the additonal HP you will obtain...it will make the motor run cooler.
Rich
Remember, I said "combustion chamber temps". While somewhat related to overall engine temps, there is a difference. '75 1.8s run REALLY lean, and that makes 'em have high combustion chamber temps, resulting in an increased possibility of dropping a valve seat or breaking off a valve. Obviously, it makes sense to do all you can to drop overall engine temps by doing the things you suggest, but it's not likely to cool the CCTs as much as you'd like, IMO.
The Cap'n
QUOTE(Cap'n Krusty @ Sep 28 2011, 02:51 PM)
Remember, I said "combustion chamber temps". While somewhat related to overall engine temps, there is a difference. '75 1.8s run REALLY lean, and that makes 'em have high combustion chamber temps, resulting in an increased possibility of dropping a valve seat or breaking off a valve. Obviously, it makes sense to do all you can to drop overall engine temps by doing the things you suggest, but it's not likely to cool the CCTs as much as you'd like, IMO.
The Cap'n
Would tweeking the combustion to make it rich solve the issue ?
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