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.

EGR question

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Old Aug 15, 2013 | 11:37 AM
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I haven't been able to find an answer to this. Where does the other end of the hard pipe connected to the EGR go and is there anything in there that could be damaged if I pushed something through it to make sure it is clear?
 
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Old Aug 15, 2013 | 09:48 PM
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I found the end of the pipe and it is attached to a fitting and then I think to the exhaust system. Is there anything in there that could be damaged if I push a wire through the pipe and fitting.
 
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Old Aug 15, 2013 | 09:59 PM
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the pipe transfers exhaust gases from the exhaust manifold to the intake manifold. If you clean it the junk will be in the pipe or pushed into the exhaust manifold. When you start the car all that soot is going to blow back towards the intake manifold so I suggest you remove the two big nuts from each end and take the tube off. Clean it and put it back on. For the exhaust manifold you can put something into it to clear the hole. Just blow it out when your done.

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Old Aug 16, 2013 | 04:11 PM
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What he said /\
 
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Old Aug 16, 2013 | 04:28 PM
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Why are you messing with it? Do you have some sort of EGR code?
 
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Old Aug 17, 2013 | 12:43 AM
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Originally Posted by rspi
Why are you messing with it? Do you have some sort of EGR code?
From a previous thread I had it is my understanding that when you change the PCV system and clean those ports you should also check/ clean the EGR.
 
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Old Aug 17, 2013 | 07:58 AM
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Ok, I remember now.

I only clean the ports in the intake end of the EGR system. The pipe is so large, you should not have any issues there, the exhaust is so hot, that end should never clog. That leaves the parts that attach to the intake manifold, mainly the ports leading into the EGR valve.

If I were doing the job and forgot to service the EGR, and I had no issues or codes, I would leave it till next time.
 
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Old Aug 17, 2013 | 01:17 PM
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My problem is that after changing/cleaning the PCV system and ports I still have pressure in the valve cover when I do the rubber glove on the oil cap opening test. I don't know if I didn't clean the ports enough or if there is more going on. I thought I had the ports really cleaned out but who knows.
 
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Old Aug 17, 2013 | 02:17 PM
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Did you try to blow through the ports in the engine to see if they were open ?? It's the passage in the pan that can be a nightmare. The port numbered "1" is the one that mates up with the cast passage in the second picture that leads to the bottom of the oil pan. That is the one that can give you the most trouble.

Did you double check all the hoses to make sure you didn't have one pull off during reassembly ??

If nothing on those two, you might want to do a compression test and see where you're at. There is a chance it's that worn and you just have too much blow-by from the rings for the system to handle . . . pretty unlikely but possible.
 
Attached Thumbnails EGR question-pcv-drain-holes.jpg   EGR question-pcv-oil-pan-passage-blocked1.jpg  

Last edited by Kiss4aFrog; Aug 17, 2013 at 02:26 PM.
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Old Aug 17, 2013 | 02:24 PM
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Originally Posted by Kiss4aFrog
Did you try to blow through the ports in the engine to see if they were open ?? It's the passage in the pan that can be a nightmare.

Did you double check all the hoses to make sure you didn't have one pull off during reassembly ??

If nothing on those two, you might want to do a compression test and see where you're at. There is a chance it's that worn and you just have too much blow-by from the rings for the system to handle . . . pretty unlikely but possible.
From your pictures it looks like the only way to access the passage in the pan is to drop the pan, is that correct? I'll go through and try double checking everything I can.
 
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Old Aug 17, 2013 | 02:33 PM
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From what I've read the only way to open that up is by pulling the pan. If anyone knows another way please jump in !!!!

The worst part is it doesn't only go down below the level of the oil but it's actually a "J" as it goes to the bottom and them hooks up.

Picture with the oil pan baffle removed.
 
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Old Aug 17, 2013 | 08:14 PM
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I bought a new PTC and hose last week. I took the old one out today and it was a mess and the gasket was also a mess, installed the new one and no more pressure in the valve cover. Thank you all for your help with this and the PCV change out that I did last weekend. Now I can work on some of the little fun stuff. Yipee
 
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Old Aug 18, 2013 | 09:07 AM
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Lol, nothing like progress.
 
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