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View Full Version : Gas/Oil mixture!!.



merconian
06-18-2003, 09:24 AM
Hi,greetings from the Emerald Isle.Just about to fit Gas shocks to the front of my 1994 C180,can i fit oil shocks to the rear??.What, if any problems?.
Cheers!!

nokia8860
06-18-2003, 09:40 AM
I thought all shocks had oil and its the gas that prevents foaming of the oil.

Are you attempting to just put in shocks filled to the brim with oil in the rear?

merconian
06-18-2003, 09:46 AM
I'm on about the internal damping properties,some shocks are gas filled shocks,others are hydraulic filled(Oil).The gas shocks are supposed to be better,but these Bilstein oil shocks are at a "Must have" price.

Renn 208
06-18-2003, 09:50 AM
could you provide a description/model/part number for the shocks you are considering?

merconian
06-18-2003, 09:56 AM
Sure,here you go,New Genuine Mercedes 202 C CLASS rear shock absorbers.

Fit C class models but NOT those with sports undercarriage

MB part #202-320-0031/0631

Must log off till tomorrow,many thanks for your input.Local time 19.00Hrs.

nokia8860
06-18-2003, 10:00 AM
Ah I was gonna say...

perhaps just change all to oil instead of doing half half. but since you have gas in front then go gas in rear.

pnsji
06-18-2003, 11:07 AM
In general, shock absorber will use oil no matter what. The different constuction is the number of tubes.

There are two kinds of shock absorbers:
1. Twin tube
2. Monotube

Twin Tube:
http://bilstein.com/products/art/illus1b.gif
The problem is oil cavitation.

MonoTube:
http://bilstein.com/products/art/shock_mono2.gif

So which one do you have?

Renn 208
06-18-2003, 11:58 AM
generally, I would suggest having matching shocks on all corners, kind of like having a matching set of four tires. While there may be some combinations of differing shocks that may work well together, the risk of having a mismatched set would tell me not to do it.

It's not even so much of a gas vs oil thing more than just not having matching sets. If the valving is significantly off from front to rear, it could make for an uncomfortable if not dangerous ride. Of course, I don't know what the damping charcateristics are of either of your sets of shocks, so I can't say for certain.

OT: are you, by chance, anywhere near Cashel?

merconian
06-19-2003, 04:58 AM
Many thanks to all for the info.We live aprox 16 Miles west of Cashel Co.Tipperary.Have you visited before??.

Renn 208
06-19-2003, 08:17 AM
Never visited, but we have a pharmaceutical manufacturing facility in Cashel. Best of luck on your damper search!