Volvo 850 Made from 1993 to 1997, this Volvo line was available in both a wagon and a sedan, both with were graced with several trim levels.

cleaning pcv system?

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Old 02-20-2010, 10:50 AM
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Default cleaning pcv system?

Is there any way to clean or flush out the pcv system? Anyone ever tried? Just wondering if it's possible rather than wait to get the parts ordered in.

Thanks
 
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Old 02-20-2010, 12:34 PM
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im just about to do mine today though i just got my new oil trap yesterday i tried running cleaner through the lines and i had no luck
 
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Old 02-20-2010, 03:02 PM
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youl probably just want to order a new one from FCP GROTON THEY ARE RELATIVELY CHEAP AND THEY COME WITH THE NEW INTAKE GASKET WHICH YOU WILL NEED after you take the intake manifold off - dont be cheap when reassembling your car the old maifold gasket will leak - trust me - been there done that
 
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Old 02-20-2010, 03:54 PM
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good to know guys thanks
 
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Old 02-21-2010, 06:10 PM
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Just replace the system. Cleaning it will not work.
 
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Old 02-21-2010, 07:00 PM
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Chances are all of your hoses will crumble anyways when you try to remove them.
 
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Old 02-21-2010, 08:41 PM
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You can clean. but you will be doing triple the work and like Gil said, some of your hoses might Disintegrate. I would just replace. The price is cheap to buy all the new stuff!
 
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Old 02-22-2010, 08:46 AM
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When you do the work, regardless you'll want to buy a new fuel line if you're replacing your PCV system and you'll want to buy extra vacuum tubing for most everything attached to your turbo control valve.
 
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Old 02-22-2010, 08:56 AM
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Originally Posted by RockVegas
When you do the work, regardless you'll want to buy a new fuel line if you're replacing your PCV system and you'll want to buy extra vacuum tubing for most everything attached to your turbo control valve.
When I did the PCV system, I just did the pcv system, I didn't replace any vacuum lines or fuel lines, and everything went back together OK. I guess it depends on year, I heard the 96/97 have a different fuel line that is hard to take off and put back on without breaking, I didn't break mine though.
 
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Old 02-22-2010, 02:35 PM
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I found this procedure:

http://lakesidedp.com/uploadpics/pcv/

Looks like a PITA, but I need to do it since I see oil puddling on top of the head near the spark plugs.
 
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Old 02-22-2010, 02:44 PM
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Same write up I used. The first time you do it it will take you probably a weekend, after you do it once it's easy, i can do the PCV in about an hour now.

TIP: You do not need to remove bottom row of bolts on intake manifold, just loosen them.
 
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Old 02-23-2010, 07:11 AM
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Gilber, if you look at that procedure above, I had to cut through hose (step 6) C. That joker was practically welded to the metal.

Yeah, it's a pain for sure. It probably took me 6 hours to fumble my way through and replace extra hoses, but in the end the job was done and I didn't have to pay a mechanic.
 
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Old 02-23-2010, 07:52 AM
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Originally Posted by radio16
youl probably just want to order a new one from FCP GROTON THEY ARE RELATIVELY CHEAP AND THEY COME WITH THE NEW INTAKE GASKET WHICH YOU WILL NEED after you take the intake manifold off - dont be cheap when reassembling your car the old maifold gasket will leak - trust me - been there done that
Yikes!! FCP Groton want $155.00 for it!! Is that relatively cheap? I replaced a PCV valve in another car for $2.00!
 
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Old 02-24-2010, 07:47 AM
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It's not a PCV valve, it's an entire system including an oil trap. More than likely the whole system is clogged and replacing one part won't fix the problem. When I replaced mine the trap was clogged, the lines were cracking and clogged.
 
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