Is my engine going?
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From: Wisconsin
Is my engine going?
Just today I was checking my vacuum hose connections because I ran my pcv line from the back of the intake manifold to the top of the manifold at the vacuum tree since I heard on this site that it would help solve the problem of oil being pushed into the air filter. I decided to change it back because it didn't help much and when I pulled off the plug I made for the back of the intake (the plug was some hose with a bolt in the end), pure oil poored out of the plug. So instead of just a little vapors coming through the pcv line, I have it pushing oil. I checked the oil level and its about a quart low, but there is no blueish smoke coming out of the exhaust. So the engine is pushing oil into the intake manifold and the air box. Is there any fix for this, or will I need a rebuild? Its a '92, 302 with 101,000 on it. Thanks for any help.
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From: Indiana
Try getting one of those oil filler caps that have the beather in it and see if it helps. My 5.8 has a fitting on the left valve cover I plugged it and it would spit oil out of the filler tube don't know if your's is the same or not. Hope this helps.
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For starters, if you are worried about blow-by, it's not so much a compression test to run...it's "leakdown" that you will be interested in. You can have a relatively large amount of leakage past the rings but not see a huge difference in compression.
Secondly, I can't quite picture exactly what you are doing when you said,
but it sounds like you are just closing the PCV line off in a loop?
The main idea of the PCV system is that during normal engine operation, small amounts of fuel and water become emulsified in your oil. As the oil reaches normal operating temp, the fuel/water begin to vaporize and these vapors are swept away by the PCV system. If you block off the PCV lines or modify the system so that manifold vacuum can no longer pull fresh air into the crank case and remove these vapors, they will just condense on cooler parts of the engine and wind up back in the oil. This will lead to increased wear.
Secondly, I can't quite picture exactly what you are doing when you said,
I ran my pcv line from the back of the intake manifold to the top of the manifold at the vacuum tree
The main idea of the PCV system is that during normal engine operation, small amounts of fuel and water become emulsified in your oil. As the oil reaches normal operating temp, the fuel/water begin to vaporize and these vapors are swept away by the PCV system. If you block off the PCV lines or modify the system so that manifold vacuum can no longer pull fresh air into the crank case and remove these vapors, they will just condense on cooler parts of the engine and wind up back in the oil. This will lead to increased wear.
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From: Wisconsin
I'll have to try the leak down test some time soon. Would I be able to use my compression guage or do I have to buy a new gauge for the test? For the pcv system, I didn't block it off, I just moved where it enters the intake manifold from the back (where all the gas went to the #8 cylinder) to the top of the manifold to spread the gases that the pcv brings in to all the cylinders. I heard that where the pcv was connected to stock, it put a lot of pressure on the #8 cylinder and tended to wreck it faster than normal so I was trying to stop that from happening. But from what I see, the damage was already done to it because the #8 had the lowest compression when I did the compression test.
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PCV vaccumm tree
is it just the 5.0's that have the #8 cylender lean-out related to the PCV or does the 351W HO have the same issue? i was lookin around down there and i couldnt see where the PCV line was going, it was a metal tube all hidden and stuff. my truck idles like **** (rythmic surging idle) so i thought the pcv thing would be causing this. im planning to remove the air pump and EGR crap pretty soon so while im working on getting that all out why not reroute the PCV
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From: Wisconsin
I dont know if its the same, I've really only heard of the problem on 302's. Heres the link if you want to read about it, this is where I found out about the problem: https://www.ford-trucks.com/forums/s...threadid=15232
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