W210 compressor seized - PeachParts Mercedes-Benz Forum

Zulfiqar · #1 05-22-2016, 01:58 PM

the compressor has an oil drain bolt - its the large hex right next to the connector, rebuilt/aftermarket compressors are shipped with very light oil in them, you need to fill and drain the compressor to wash out the shipping oil then refill with correct oil charge before installing. If you bought a denso new compressor they come shipped with about 100 ml PAG46 oil in them.

reason to post is that - you may have flooded the compressor with oil if you didnt remove the sump bolt (and if your supplier put some oil in there), this creates a problem with these units - the volume metering device on the suction plate of the compressor will stall and you wont get any pumping even with full 1000 grams charge.

I hope you bought the updated type compressor, its got a smaller volume metering valve and is named as Denso 7SBU16C. The original ones 7SB16C have a design fault where one suction reed fractures from its base plate and siezes the unit

jay_bob · #2 05-22-2016, 07:31 PM

Quote:

Originally Posted by Zulfiqar

the compressor has an oil drain bolt - its the large hex right next to the connector, rebuilt/aftermarket compressors are shipped with very light oil in them, you need to fill and drain the compressor to wash out the shipping oil then refill with correct oil charge before installing. If you bought a denso new compressor they come shipped with about 100 ml PAG46 oil in them.

reason to post is that - you may have flooded the compressor with oil if you didnt remove the sump bolt (and if your supplier put some oil in there), this creates a problem with these units - the volume metering device on the suction plate of the compressor will stall and you wont get any pumping even with full 1000 grams charge.

I hope you bought the updated type compressor, its got a smaller volume metering valve and is named as Denso 7SBU16C. The original ones 7SB16C have a design fault where one suction reed fractures from its base plate and siezes the unit

I bought a GPD 6511631 (Chinese Denso 7SBU16C clone) from the rock. I wonder if this shipped dry, I turned it over every which way and rotated it. I did not hear any sound of oil moving around or slurping sounds out of the ports. I would think that if there was 100 ml oil in it that at least something would have come out the ports when I did this. Also the rubber shipping plugs were dry on the inside.

There was no instruction sheet, only a sheet that told me that if the original compressor grenaded then I needed to replace the entire system since the condenser and evaporator are parallel flow designs and can not be flushed. But I already knew that...

Zulfiqar · #3 05-22-2016, 11:13 PM

Quote:

Originally Posted by jay_bob

I bought a GPD 6511631 (Chinese Denso 7SBU16C clone) from the rock. I wonder if this shipped dry, I turned it over every which way and rotated it. I did not hear any sound of oil moving around or slurping sounds out of the ports. I would think that if there was 100 ml oil in it that at least something would have come out the ports when I did this. Also the rubber shipping plugs were dry on the inside.

There was no instruction sheet, only a sheet that told me that if the original compressor grenaded then I needed to replace the entire system since the condenser and evaporator are parallel flow designs and can not be flushed. But I already knew that...

that compressor is sold under many different names and is always shipped with almost no oil in it. It is always a good idea to fill and drain it. This compressor is drained like GM V5 compressors, you need to remove the sump bolt.