HELP!!! Oil spray
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Senior User
Joined: Oct 2005
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From: Livonia Michigan
HELP!!! Oil spray
I took my truck out on the freeway today to blow out some carbon and when I got back I noticed there was oil spray on the front of the engine and also above on the underside of the hood. Upon closer inspection I see a fitting of some sort open and it appears to be on top of the timing cover or maybe the water pump. It's on the right side of the engine and it may have had a rubber cover on it at one time, it's right below the little water hose or bypass or whatever that little water hose does.I hope it's not the water pump, I don't want oil in there. Any ideas
John
John
Elder User
Joined: Jul 2006
Posts: 688
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From: right here in michigan
i think that "fitting" is for a dipstick.460's sometimes had the dipstick up front and sometimes in the pan.they have a rubber cap like a vacuum cap on them.next time you have the cover off weld it shut.for now just needs a cap put back onit.may want to clamp it on ,so the next time you "blow the carbon out" you don't "blow the cap off".
Logistics Pro
Joined: Feb 2000
Posts: 3,565
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From: Sun River St. George
Instead of running the pi$$ out of your engine to "blow out the carbon", try this! Remove the air cleaner, run the engine at a fast idle 1000-1200 rpm, slowly pour about a gallon of water down the carburetor. Don't stall the engine!!! Then change the oil and filter and have a happy carbon free life. The water will steam clean the pistons and heads so nicely you wont believe it. Trust me on this one, been doing this for over 50 years.
Logistics Pro
Joined: Feb 2000
Posts: 3,565
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From: Sun River St. George
Got this from my uncle Sonny! Take the exhaust manifolds off, rev the engine and drop popcorn down the carburetor. I guess the steam theory applies plus the abrasive qualities of the pop corn hulls. I have never tried this but someday I will. Buddy of mine poured gas in the heads of an engine without an intake manifold installed. Very high rpms until it siezed!! Seriously, the water trick works fine, just don't stall the engine and you must change oil afterwards.
Hotshot
Joined: Dec 2003
Posts: 18,423
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From: iowa
I prefer to use a squirt bottle like a window cleaner bottle and spray the water down the carb, and yes it works very well. If I am going to rebuild an engine that is currently running but in bad shape I will do this just before pulling it and tearing it down. You would be amazed at how clean the pistons, and heads come out, they almost look like brand new makes for cleanup a lot easier, and it also makes getting the pistons out of the block easier too (takes the carbon ridge off the top of the cylinder wall too) it's a old trick but a dang good one.
As to the fitting you mentioned it's a dipstick tube, all the timing covers had them but on vehicles with a rear sump pan it's plugged off with a round metal slug that is driven in, yours just for some reason came loose and blew out. No a vacumn cap will not seal it, but if you blew that plug out I would take a serious look at your PCV system bet the valve is stuck or clogged.
As to the fitting you mentioned it's a dipstick tube, all the timing covers had them but on vehicles with a rear sump pan it's plugged off with a round metal slug that is driven in, yours just for some reason came loose and blew out. No a vacumn cap will not seal it, but if you blew that plug out I would take a serious look at your PCV system bet the valve is stuck or clogged.
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Postmaster
Joined: Nov 2001
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From: Escondido, CA
Holley had a water injection kit in the early 80's that supposedly improved performance. I also know for a fact that a little misting of water with the engine running helps flake off the carb and send it out the exhaust. Another option for the plug on the timing cover would be a pipe thread plug. Use a pipe tap with some grease on it to hold the shavings. Just pull it out even few turns to clean the shavings off. Then install a threaded plug to keep it from ever unintentionally coming out.
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Monsterbaby, you had mentioned the PCV...my 460 has none...it has aftermarket valve covers with breather caps, but no PCV. I have always heard the PCV was a necessary part of the components??? I do have quite a bit of oil type smoke coming from both of them, and the motor is using oil, but the oil is staying clean (caramel color) between changes.
Postmaster
Joined: Nov 2001
Posts: 3,351
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From: Escondido, CA
The PVC system is a way to cut down on the emissions your engine produces and help to seal the rings just a bit. The spent gases that get past the rings are sucked back through the intake and reburned. I ran a PVC valve on my engine to cut down on the oil vapors coming out of the breather.
Posting Guru
Joined: Sep 2003
Posts: 1,192
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From: lino lakes, mn
PCV stands for Positive Crankcase ventilation it does not hurt an engine in any way, it can only help. With just the two breather caps crankcase pressure builds and in your case it blew out a plug in most cases it blows out a seal like rear main,or timing cover
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