| Ugh....Wanna see some disgusting intake ports? |
Subject: Ugh....Wanna see some disgusting intake ports? by 92Polo on 2012/5/11 0:25:24 I was hunting for an exhaust leak on my '95 F-150. It has to be upstream of the O2 somewhere because it has caused the gas mileage to drop in the toilet. It's a 300 inline six so the intake and exhaust bolt down together. I got the intake and exhaust manifold off and UGH...  That may be my exhaust leak on the #4 port, but look at the disgusting intake ports. This is what happens with crankcase vapors and EGR gasses combine in a "dry" intake. It's a fuel injected engine but the way the injector is situated it sprays directly over the top of these deposits with no way to clean them. Just cleaning these out should gain me about 10 HP back. It's got 198k on the clock. I expected to find that kind of sludge under the valvecover but it's actually remarkably clean, as is the inside of the pan. I guess the PCV is working, perhaps a little too well! It's gonna be going back with a header and I think I'll be putting a catch can on the PCV to see if I can keep this from happening again. |
