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-   -   Oil "Blow-By" Inside Intake (https://www.taurusclub.com/forum/115-5th-6th-gen-engine-drivetrain/348849-oil-blow-inside-intake.html)

AdmiralSparklez 01-30-2019 10:25 PM

Oil "Blow-By" Inside Intake
 
Hi all,


Just out of curiosity, has anyone with a 2010+ Taurus taken their upper and/or lower intake manifolds off their vehicle for any reason? I notice the Taurus does indeed suffer from blow-by and I'd like to know if anyone else, SHO or non-SHO, has seen or smelt oil inside their intake system.

For my situation, I just got around to porting my lower intake manifold and I noticed after taking both the upper and lower off, the smell of oil was very prominent and you could visibly see the shine inside the upper and lower intake and oil around the gasket. My car being ecoboosted when it's supposed to be just the N/A V6 could be a reason for this, however I also race my Taurus (not as often since I have the Mustang which, ya know, is actually kinda built for that and isn't a land whale) which I know is a cause for blow-by to happen.

ice445 01-31-2019 01:02 AM

For starters, simply finding oil in the intake tract doesn't immediately mean the engine has excessive blowby. A malfunctioning PCV system can lead to an unusual amount of oil escaping the head, for example. If you have a turbo car there's also the possibility that the turbo compressor side seal is letting oil past under high compressor speeds. This is why many modified turbo cars use a catch can. I use one on mine. That's how I determined that the turbo was at fault for the oil in the system and that the engine has almost no blow by at all.

Lastly, simply finding oil in the intake isn't a smoking gun that there's a huge problem. Many, many setups are designed in such a way that it's a normal occurrence, regardless of how well it's maintained. It also doesn't hurt anything. If you're starting to see oil smoke out the tail pipe or ash fouled plugs, then that's a different story.

AdmiralSparklez 01-31-2019 09:47 AM

Quote:

Originally Posted by ice445 (Post 3452303)
For starters, simply finding oil in the intake tract doesn't immediately mean the engine has excessive blowby. A malfunctioning PCV system can lead to an unusual amount of oil escaping the head, for example. If you have a turbo car there's also the possibility that the turbo compressor side seal is letting oil past under high compressor speeds. This is why many modified turbo cars use a catch can. I use one on mine. That's how I determined that the turbo was at fault for the oil in the system and that the engine has almost no blow by at all.

Lastly, simply finding oil in the intake isn't a smoking gun that there's a huge problem. Many, many setups are designed in such a way that it's a normal occurrence, regardless of how well it's maintained. It also doesn't hurt anything. If you're starting to see oil smoke out the tail pipe or ash fouled plugs, then that's a different story.


Right. I'm not under the impression that it's a major issue or that the car suffers from it excessively. I'm only curious to if anyone else with a 2010+ has noticed oil in the intake system and if they have done anything to cure the situation. It can, however, create loss of compression and excessive fuel consumption. I know quite a few modern Fords are prone to blow by, however I'd still rather not allow my car to have this issue.

Jeff K 01-31-2019 09:57 AM

All cars with a PCV system will have a small coating of oil throughout the intake. If oil is excessive, try replacing the PCV valve with the correct Motorcraft part only, no junk from the discount parts store.

Myetball 02-08-2019 07:19 PM

Mine had a similar issue. Replaced the breather tube on the left bank (closest to radiator) with new hoses running to/from an oil catch can. After a few years there is still no oil in the catch can. Seems the problem is the short distance and the amount of vacuum on that breather tube.

ribeye2065 02-18-2019 01:55 PM

I did some coil packs the other day and it had a fair amount of oil coating the inside of the intake manifold. I'd say as long as it's not dripping from the intake Plenum, you should be okay as the gasoline will remove most from the valves and cylinders.

AdmiralSparklez 02-18-2019 07:50 PM

Gotcha. Thanks for the replies everyone. I'm crazy overprotective of my two cars. Thankfully our cars aren't as bad as the Mustang. Good Lord, that catch can fills up.

GBTaurus 03-14-2019 02:19 PM

What year is your Taurus? Looks like theres an updated valve cover on the 10'-12' models that doesn't let as much blow by through. Heres a link to the video talking about it https://youtu.be/gNFXNdNIPr8


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