440- Got hot and got noisy and lost pressure

[jerry]

Okay, spun primer with drill, no pressure shows on gauge. Removed oil pump, and no broken parts. Removed pressure spring bolt. Spring had no pressure up against bolt, is that correct? Piston under spring moved freely. Ordered new mellings HV pump, should have it today. For the hell of it, we put pump back on and checked for oil at sending port at top rear of motor. Even with drill spinning fairly well oil just kinda dribbled out. Also we could here oil moving inside.

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Glad to know pickup tube intact.

 

[IQ52]

Pull the valve covers yet? I'd take a real good look under there.

 

[jerry]

Havent pulled valve covers yet. Rocker shafts only get oil at 2 points on cam rotation and dont want to spin motor to find them. Keeping fingers crossed that new pump is the cure. I will know tomorrow.

 

[IQ52]

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The valve train is rattling after a hard run, and now after the second time you lose oil pressure and the first thing you are going to do is replace the oil pump with a new one without pulling the valve covers for free? Okay..............

But, what if you bent a pushrod and the lifter jumped out of the lifter bore and all the oil pressure is going out the lifter bore oil galley?

 

[Garys1969RR]

Good point, IQ 52! The OP can says he can hear oil moving thru the motor, and it dribbles out of the sending unit port at the rear of the block. Sounds as if the oil is flowing thru some type of opening that may be exposed inside the engine. That would account for no oil pressure, and just a small amount coming out the sending unit port. Yes, I agree, pull the valve covers and inspect the valve train.

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Funny how when oil pressure is lost we tend to suspect the pump first. Oil pumps are very durable, and don't fail very often.

 

[72Fourspeed]

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But, what if you bent a pushrod and the lifter jumped out of the lifter bore and all the oil pressure is going out the lifter bore oil galley?

I actually have seen a 460 Ford do just that. It broke a valve spring, bent the pushrods, & then spit out a lifter. Customer wanted a new oil pump put in. Wouldn't go for anything else. So we put it in........ And then looked for the problem.

 

[miller]

Okay, spun primer with drill, no pressure shows on gauge. Removed oil pump, and no broken parts. Removed pressure spring bolt. Spring had no pressure up against bolt, is that correct? Piston under spring moved freely.

There's one of your initial problems...pressure relief spring. Either wrong one, or flat wore out. Have one exactly like it in my pump. Yeah, gotta order a new one...still building the motor.
If you check in your service book, it tells you what the free length of the spring should be. (On mine, 1/4" short!)

Even buying a new pump, I'd sure check that spring.

 

[jerry]

Will take covers off for a look. I have new pump in hand and about to get started. Thanks again. Will let u know.

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Will take covers off for a look. I have new pump in hand and about to get started. Thanks again. Will let u know. But if I bent a pushrod and lost a lifter it would have started running very rough immediately. It didnt do that.

 

[super-bee_ski]

The car is upsdie down....all the oil drained out.... (Sorry...could not resist)

Hope you caught it in time, Jerry. Almost sounds like something started to loosen in the oil pickup system and finally got bad enough to lose the ability to prime the pump.

Cut open the oil filter too... just in case. Somone on one of the forums recently reported a collapse of the internal element in a filter.

Too funny ....

X2

 

[72Fourspeed]

Will take covers off for a look. I have new pump in hand and about to get started. Thanks again. Will let u know.

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Will take covers off for a look. I have new pump in hand and about to get started. Thanks again. Will let u know. But if I bent a pushrod and lost a lifter it would have started running very rough immediately. It didnt do that.

Actually the 460 ran pretty well. It was an intake that popped, so there wasn't a backfire through the carb.

 

[jerry]

You were right. 2 bent pushrods on #8. 1 lifter popped and there went pressure. What causes this, too much rpm? I had 6000 chip in msd box, i will go to 5500.
At least it looks like the only damage so not too bad.

 

[Photon440]

Hey Miller, what are you using, a dentist drill? I have several drills, mostly either in the 600 - 1200 rpm range, or variable speed. That's slower than the oil pump would be turning on most highways, shouldn't be any problem.

jerry, you'll probably have to rotate the crank to line up the oiling holes with the heads, or you won't see anything at the rockers. You likely won't get oil to both heads at the same time.

But I see you found a problem, at least so far it doesn't look like it's in the bottom end.

 

[nothingbutdarts]

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The valve train is rattling after a hard run, and now after the second time you lose oil pressure and the first thing you are going to do is replace the oil pump with a new one without pulling the valve covers for free? Okay..............

But, what if you bent a pushrod and the lifter jumped out of the lifter bore and all the oil pressure is going out the lifter bore oil galley?

Tons of knowledge with this guy!!!! He was spot on with his advice!

 

[miller]

Hey Miller, what are you using, a dentist drill? I have several drills, mostly either in the 600 - 1200 rpm range, or variable speed. That's slower than the oil pump would be turning on most highways, shouldn't be any problem.

jerry, you'll probably have to rotate the crank to line up the oiling holes with the heads, or you won't see anything at the rockers. You likely won't get oil to both heads at the same time.

Funny. Yeah, I've seen the 'tech' stuff on pre-oiling, using a drill motor. So what?
Also never had to rotate my motor, to pre-oil, and have always gotten oil to each rocker.
So...I'll stick with my speed handle, and turn it by hand. Not in a hurry.

 

[68 HEMI GTS]

Pull the valve covers yet? I'd take a real good look under there.

sure as hell would have been the first move to make instead of all the messing around. gotta love the inter web.....

 

[coloradodave]

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The valve train is rattling after a hard run, and now after the second time you lose oil pressure and the first thing you are going to do is replace the oil pump with a new one without pulling the valve covers for free? Okay..............

But, what if you bent a pushrod and the lifter jumped out of the lifter bore and all the oil pressure is going out the lifter bore oil galley?

Good call, IQ52! The voice of reason and experience prevails...