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Discussion Starter · #1 ·
I have oil blowing out of the dipstick and the oil cap. a lot of oil on top of the head (cam box). Someone told the "screen" is clogged. About a quart of oil every 3000 miles blows out. What is the correct name for the "screen" and where is it ? After searching the forum I see it could be a vent box? 1995 850 non turbo 160,000 miles
 

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Sorry Fish, I am quite unfamiliar with the issue.
 

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I got the same problem except mine (1995 850) has 117,000 miles and is blowing oil out of the oil cap seal. It's also leaking out of rear main seal on the bottom of motor. The tech suggested I replace the vent box first to slow down the leaks and plan on replacing the rear main sometime soon. Only thing is the vent box or what ever it's called is under the intake manifold and is a pain to get to..

So if anyone finds out the real name of the "Vent Box" please post and also a "how to" would be great to save us folks some labor cost.

Thanks
Greg
 

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Yes, that would be GREAT!
 

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OK here it is, the vent box is also called the Oil trap. Yes it is located under the intake manifold and a bugger to get at. The other issue could also be what is called the Flame Trap.... this is a $5 piece that can cause the same problem, often the general public and even mechanics not trained on Volvo's don't know its there so it never gets changed on regular major services. Tha flame trap is my first choice to change the p#1389657 is the same as what was used on all the 240 740 and 940 series. If you find the oil trap follow the hose out of the top of it accros the intake and it will come to a hos that increases in size again which connects to a plastic piece they call a nipple. Inside the nipple you will find your flame trap which will likely be black if it has not been changed in some time. Bearing that in mind you may as well get a new nipple and oring because it will likely break apart. P#'s 9135060 and 978345.
Plan soon down the road to do the oil trap, much larger job. Haven't known anyone to do it without removing the intake manifold. When you do try to get the P# from the top of the trap, it will make it much easier for your supplier as there is a few variations.

Hope this helps
 

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QUOTE(scotts05s40 @ Jul 21 2005, 07:57 AM)OK here it is, the vent box is also called the Oil trap. Yes it is located under the intake manifold and a bugger to get at. The other issue could also be what is called the Flame Trap.... this is a $5 piece that can cause the same problem, often the general public and even mechanics not trained on Volvo's don't know its there so it never gets changed on regular major services. Tha flame trap is my first choice to change the p#1389657 is the same as what was used on all the 240 740 and 940 series. If you find the oil trap follow the hose out of the top of it accros the intake and it will come to a hos that increases in size again which connects to a plastic piece they call a nipple. Inside the nipple you will find your flame trap which will likely be black if it has not been changed in some time. Bearing that in mind you may as well get a new nipple and oring because it will likely break apart. P#'s 9135060 and 978345.
Plan soon down the road to do the oil trap, much larger job. Haven't known anyone to do it without removing the intake manifold. When you do try to get the P# from the top of the trap, it will make it much easier for your supplier as there is a few variations.

Hope this helps
[snapback]11719[/snapback]​


Well said!!
 

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Discussion Starter · #8 ·
Thanks guys, I got a new flame trap but the bottom of the hose is a bugger to get to. I blew into the hose and it blew air out of the top of the head. Is this ok or should I try to replace the flame trap ? Also can someone tell me where the vent box is ?

Thanks Fish
 

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Thats ok.
The vent box in on the front of the engine on the bottom.
It is like above the oil filter.You have to look from the top to see it.
 

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Great!

Thanks for the link!
 
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