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Unread 05-11-2013   #1 (permalink)
y2kgt is offline Rookie


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Default No Oil Pressure to the heads

Over the course of a few months I started noticing my valvetrain become progressively louder and louder. After the engine chatter became too loud to bear I checked my timing chain. The plastic Guide plates had broken and shredded and there were actually pieces logged in the chain. After replacing the chain and guide plates Im still have the same exact valvetrain noise. Pulled the covers and there is no oil shooting around inside. Im hoping that my oil pump screen is clogged. Whats the chances of any debri making it through the screen and blocking passages? Anybody dealt with this?
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Unread 05-11-2013   #2 (permalink)
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the pickup screen is probably clogged. Youre going to have to drop the pan to check. The screen is pretty tight, dont think any pieces would make it through.
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Unread 05-12-2013   #3 (permalink)
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My only question is, if the top end was oil starved, where else was oil starved? Hope ya get lucky on this one...

Have fun dropping that pan, btw.
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Unread 05-12-2013   #4 (permalink)
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The original Windsor motor in my 2000 GT failed in nearly the same way. I pulled the Windsor and upon tear down found the oil pick-up clogged with large chunks of plastic and very small bits of plastic "soup/goo". IMO it's the plastic goo that's the most concern.

If this were my car, I would pull a valve cover. Inspect the cam lobes for signs of overheating (blue). Pull a cam tower bearing cap. Look for signs of galling and metal transfer. If found, I'm afraid the entire top end is toast.

I have to agree with SoCal2v. IMO it's as much work to drop an oil pan as to remove the entire motor. Knowing what I know now and based upon the symptoms, I would pull the motor before pulling the oil pan. It's soooo much easier to do motor work on the engine stand.

Of course it's a no brain'er if the heads have been oil starved.
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Unread 05-15-2013   #5 (permalink)
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From what you describe there's very good chance you hurt the cam saddles, if the heads are not oiling you definitely have a problem and the car should not be driven AT ALL until it is resolved. I hope you didn't damage the saddles, there are a few shops that can fix them, but not always.

Basically I'm with Burns, everything up top needs to at least be inspected as well as the pump screen.
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Unread 07-23-2013   #6 (permalink)
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So I drop the oil pan and sure enough there was a huge amount of metal and plastic shavings from the guide plates and timing chain that had went. The oil screen was clogged with shavings. Cleaned it off and cleaned everything up, put it all back together and still not getting enough oil to the top end. Im getting more than I was but its still got a loud tick. In all its probably been driven about 20 miles with the loud tick. Before I chuck it up to another motor, was wondering if you guys see any point in removing the heads and trying to clear out the oil passages in the block or heads. Or do you think its a waste of time at this point? Thanks in advance
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Unread 07-24-2013   #7 (permalink)
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Well...... Your best bet at this point would probably be dropping the pan.... again.... and replacing the oil pump, and pickup assembly. You probably lucked out due to the fact that you didnt drive very far on it, and the fact that any of the plastic/goo and garbage that got sucked thru the pump pickup screen and thru the pump would have gotten stuck in your oil filter. You will definitely want to do a new pump because if the pump was starved of oil the gears inside pribably got screwed up, not to mention debris that may have gotten caught in the pressure relief valve on the pump. Change the oil pump, pickup, and do a fresh oil change and filter and let us know where your at.

You might be suprised, I think ull be alright. The oil filter was most likely your saving grace in keeping all that crap from going into the pressurized oil areas on your top and bottom end.
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Unread 07-24-2013   #8 (permalink)
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So you took a bunch of metal out of the pan and buttoned it back up, and you're surprised its still making noise? You're setting yourself up for failure. Your best bet is to tear it down and plan on a rebuild. If there was oil in the pan it circulated through everything. Everything needs to be inspected and odds are a lot of it is going to need replacement now. Running it after a failure like that is a surefire way to kill an engine.
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