Hi James
You may want to check on ride height sensors while you are there as well. I have heard that they
can be used on the GMC.
These pumps are also used on newer cars, usually high end Olds, Buicks, and Caddys. The older cars
have the compressor at the front of the fender, sitting with the cylinder horizontal. Easy so
recognize and remove. The newer cars have the pump on the side of the fender between the engine and
fender, these pumps are mounted with the cylinder vertical, you need to look closely to spot them.
The ride height sensors on the independent rear suspension cars are the easiest to remove. Look for
a small rod going from the suspension up towards the frame on the drivers side. The sensor is
mounted with two bolts into an opening in the frame.
In Calgary they are charging $9.00 for the pump and $5.00 for the sensor. That's Canadian dollars,
which is $10.00 US for the pair.
There are a couple of shortcomings in the EL II system.
First - The Hold valve is open any time the system is in the AUTO position. It would be better if
the hold valve only opened when the system was adding or removing air. The system can be rewired to
achieve this. I have a drawing if you are interested.
Second - There is no over pressure protection on the air bags. The maximum pressure for the air bag
is 125 PSI but those little pumps can put out 165 PSI. McMaster Carr sells small pop-off valves
that can be put between the pump and the hold valve, or you can add a cutoff switch.
Dave Mumert
dave
- ----- Original Message -----
From:
To:
Sent: January 27, 2000 10:58 AM
Subject: Re: GMC: support my local GMC shop
>
> Hi,
>
> Thank you all for the money saving tips. I will search for compressers
> at a junk yard. It will save me a few hunderds easily.
>
> Thanks.
>
> James
> 78 Royale
> Fremont, CA
>
> kit from Gateway also work for 78's Electro-Level II system?
> I was told that they can not be rebuild and replacing part cost about
> $800. Is that true?
> >>
>
You may want to check on ride height sensors while you are there as well. I have heard that they
can be used on the GMC.
These pumps are also used on newer cars, usually high end Olds, Buicks, and Caddys. The older cars
have the compressor at the front of the fender, sitting with the cylinder horizontal. Easy so
recognize and remove. The newer cars have the pump on the side of the fender between the engine and
fender, these pumps are mounted with the cylinder vertical, you need to look closely to spot them.
The ride height sensors on the independent rear suspension cars are the easiest to remove. Look for
a small rod going from the suspension up towards the frame on the drivers side. The sensor is
mounted with two bolts into an opening in the frame.
In Calgary they are charging $9.00 for the pump and $5.00 for the sensor. That's Canadian dollars,
which is $10.00 US for the pair.
There are a couple of shortcomings in the EL II system.
First - The Hold valve is open any time the system is in the AUTO position. It would be better if
the hold valve only opened when the system was adding or removing air. The system can be rewired to
achieve this. I have a drawing if you are interested.
Second - There is no over pressure protection on the air bags. The maximum pressure for the air bag
is 125 PSI but those little pumps can put out 165 PSI. McMaster Carr sells small pop-off valves
that can be put between the pump and the hold valve, or you can add a cutoff switch.
Dave Mumert
dave
- ----- Original Message -----
From:
To:
Sent: January 27, 2000 10:58 AM
Subject: Re: GMC: support my local GMC shop
>
> Hi,
>
> Thank you all for the money saving tips. I will search for compressers
> at a junk yard. It will save me a few hunderds easily.
>
> Thanks.
>
> James
> 78 Royale
> Fremont, CA
>
> kit from Gateway also work for 78's Electro-Level II system?
> I was told that they can not be rebuild and replacing part cost about
> $800. Is that true?
> >>
>
