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2004 S60 R 4C front struts

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Re: 2004 S60 R 4C front struts

Post by SuperHerman » Thu Jun 07, 2018 11:52 pm

I will start out by saying I don't know the set up on you particular vehicle - no experience with it or the 4-C system. I fully admit I am flying blind here. Without seeing the car I am making a bunch of assumptions - educated ones - based on seeing and reading about all sorts of Frankenstein work arounds in my life and relying on what you are describing. It is interesting though.

First some questions. Has the nose of the car always been too low or is it something new? Has the car's driving characteristics changed since the light turned on? If the performance and nose height has not changed from its pre-wash/light state, read on.

I wonder if the prior owner zip-tied the electronics to fool the computer - the sole purpose of leaving them in was to turn off the dash lights. They serve no other function. If this is the case you don't have a working 4-C suspension. I suppose this is a viable work around for a higher mileage car - if it is done correctly. I don't know if this works, but from the sounds of it, if my below theory is what has happened, it does sorta work. How the prior owner executed it is another matter. S/he may have cut the springs or put lower front springs in on purpose. It is also possible all that was changed were the shocks - and the stance of the car is normal. Need more information to determine this scenario.

Speculating - it looks like the prior owner did what I outlined above, and the car wash took out your module. It also sounds like you are willing to go this route.

Chasing this scenario you need to get the part numbers of all the shocks currently on the car and look them up to see what you have going on. At the same time look at the front and back springs and try to determine if they are original. Once you have this figured out pull up some suspension diagrams for your car and for the proposed "2003 S 60 AWD" stated target donor and compare part numbers to figure out if your proposed swap would work. Basically you are looking for any other suspension component which is different on the R other than the 4C parts compared to the "2003 S 60 AWD". Once you know this - your upgrade path is much clearer.

You still need to sort out your shorted out module. I would assume that an used like for like year swap would work without programming if said module behaves like most Volvo modules. Then again maybe you can repair it.

Could you post some pictures of the shocks, springs and zip-tied electronics?

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Re: 2004 S60 R 4C front struts

Post by MDK » Fri Jun 08, 2018 5:20 pm

Hey Superherman... I appreciate your reply on 04 S 60 R car. The car wash thing started when I had removed the A pillar covers which from the factory we're covered with headliner material. I waited until I found some plastic gray colored ones I got from a 2002 wagon. While they were off, that's when I saw the door gasket leaking and running down the inside of the A pillar , onto the 4C module under the dash. I'm not sure why the people in Gothenburg just didn't put a straw in there to make sure it dripped right on it. Sheesh! Anyway.. I wanted to let you all know how much I appreciate all the feedback and figure out the best route to take on this problem. I'm new to the forum so I'll figure out how to send you some pictures of this car so you all can see what I'm seeing... take care and have a great weekend!.. MDK

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Re: 2004 S60 R 4C front struts

Post by scot850 » Fri Jun 08, 2018 5:27 pm

Munro were the OEM for the 4-C struts. Not sure if you can buy them direct from Munro. Can't be any worse than the OE Volvo part. I am surprised that they actually got to 12+ years and 90k miles on the front and about 10 years and 75k miles on the rear. Before that any Munro shocks I had on Volvos didn't last more than a year! If you pull the parts from another AWD car fitted with $-C struts just make sure the part number is the same. Like I said the 'R' model has 3 stiffness settings where the XC70 has only 2. I think that may be controlled by the module and not the shock itself but I really don't know.

Good Luck.


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Re: 2004 S60 R 4C front struts

Post by jimmy57 » Fri Jun 08, 2018 6:11 pm

4C is standrd on the 04-07 R models. Those cars were what 4C was developed for and those models premiered the system. It was an option on some P2 and P3 models. The shock has no leveling like the Jags, it is variable damping rate continuously. The switch above center vents selects different programs which move the damping range from soft to medium to HARD (comfort-sport-advanced). The Suspension Module (SUM) is to the left of the center console so I'm thinking water from door weatherstrip didn't get it but A/C drain being stopped up can. The front carpet will be wet when the module is wetted. The height problem will not the result of anything with the struts or shocks. The gas in the shocks provides a minimal lift but the difference between full gas charge and no gas charge in a strut or shock on that car is less than 1/4 inch. Have the upper spring seats/strut mounts been checked? Broken springs up front? Partial break in the spring seat carried on strut?
The original 4C strut and shock supplier is Tenneco Automotive and Monroe is their consumer brand they market these under. If the struts and shocks aren't leaking then the noise can be from a bad sensor that gives wrong info and damping is stiffened for rebound when the suspension is in jounce. You really need a VIDA read of the system for codes. Shocks, sensors, and control unit will fix it like a new house fixes a roof leak in your old house when maybe it just needs sealant along the chimney flashing.

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Re: 2004 S60 R 4C front struts

Post by MDK » Sat Jun 09, 2018 1:16 pm

Hey Jimmy 57.... I think you hit the nail on the head brother. I knew that the Volvo dealership here in town was trying to soak me, telling me it needed EVERYTHING. so I'm definitely going to take your advice and go thru this car step by step just as you outlined. Thanks again and God bless..MDK

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Re: 2004 S60 R 4C front struts

Post by erikv11 » Sat Jun 09, 2018 3:26 pm

Or maybe just the PO installed ridiculously short lowering springs up front? Keep us posted MDK what you find.

'95 854 T5-R || m4.4 || 185k
'96 855 NA || 140k
'98 V70 || T5 tune-injectors-turbo, LPT engine || 275k
'06 S60 R || 145k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 NA S70 174k

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