Hi Everyone,

I have a '98 S70 GLT that I just put a replacement engine into due to the PO running the old one out of oil. Anyway, the replacement engine has around 160 K miles on it. While the engine was out, I replaced the crankcase breather box and all of the associated hoses. All of the vacuum lines are new and the turbo was just rebuilt while I had the engine out of the car.

The problem now is that the car smokes out of the exhaust when driving. It does it the most when I pull to a stop after driving. There's also a lot of oil seeping out of the intercooler to turbo hoses and out from around the dipstick. The check engine light is also on with misfire codes PO300, PO302, and PO305. I just put in a set of Volvo plugs yesterday.

As far as I can tell I've hooked up everything correctly to the replacement engine. Any ideas as to what would cause this problem?

Thanks in advance!
Dave

Well, after reading a previous post by Klaus I checked the valve on top of the air intake duct (right where it goes into the turbo). Mine wasn't plugged in the small nipple but it was completely blocked in the larger opening where the hose from the breather box connects. This was causing all of the smoke from the exhaust and excessive crankcase pressure. After cleaning this out the car has stopped smoking the the crankcase pressure is way down. Thanks again as Klaus' post was a big help.
Dave

When you replaced the breather box, did you put the lines back on the top as per the diagrams? If so, they are on in reverse order!! The one from the valve cover goes to the stack next to the block.
Also check the vacuum line nipple at the end of the intake air duct just before the turbo. It might be clogged. Be careful, it can be brittle with age. Use a pipe cleaner or very small screwdriver to clean it out.
--
My name is Klaus and I am a V ♂ lv ♂ holic.

Hi Klaus,

I checked the lines on the breather box and they're connected correctly. Also, the nipple on the air hose is clear. I did a cylinder leak down check today and it checked out fine. Maybe valve stem seals would do this but I don't see how that would relate to the check engine light for the misfire codes.


Thanks,
Dave