Pop Quiz... Am I doomed???

Sep 10, 2005 9 Replies
67 Bus... stock 1600, external cooler, been like this for decades with no surprises.

Had been mostly sitting for a few years. Drove it around the block every now and again. Been driving it almost daily now for a few hundred miles. Short around town trips. Everything is as it should be. Oil temp never goes over about 210 unless a big headwind or something. Idle pressure is maybe 10 or so...12? Engine is pretty fresh if I recall... it has been years, but very few miles. Never overheated or other disasters.



Today: All systems go... drive down the street, get on the highway, go about 2 miles, smell hot oil, check gauge, it is at ZERO! s*it my pants, pull over. Sounds a bit noisy... no leaks no weird smoke etc, belt is ok. Oil level is ok. Start it back up after about 5 minutes. Sounds fine, take off down the highway... watching the gauges like a hawk... seems a bit sluggish but still sounds ok.... oil heat gauge is rising toooo fast.... gets to 210 in about a mile and a half and oil pressure is dropping from 40 to 35 or so to 15... 10.... I pull over again.... hmmm... wait a few minutes and repeat process.... same story. When the oil pressure goes way down there, the noise level increases... sounds kinda like a rod I guess... but then it sounds just fine as the pressure miraculously goes back up, sometimes even while driving.... low pressure = noise, regular pressure = seems fine. Made one turn, and pressure went to zero in the turn... maybe unrelated, maybe not... seemed kinda important but was in too much of a panic to check the turn theory again as I needed to get the thing home pronto....



Ok.... go ahead and give me the bad news.... I can take it.



Thanks!



ps: Hi Kath and Blinny!



I can't imagine it being something terminal inside the engine.

Pump gears worn/cover worn.

Oil pickup tube not secure in the case.

Problem with relief valves.

Just a few off top o' my head I'd check...

A bit low on oil I 'spect.......

or maybe the fule pump diaphragm has a hole in it and it's leaking fuel into crankcase.............

Possibly a small animal has built a nest in your cooling system and is causing a shortage of cooling air too.............endless possibilities it seems.

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MUADIB®

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If A Quiz is Quizzical, What is a test?

The Peacemaking Meeting scheduled for today has been cancelled due to a conflict.

Update: Pulled the oil screen off the bottom end. There are very many "flakes" of a mostly magnetic metal on and around the screen. Some fairly large, like .125 x .125. Not looking good. Ok, guess time... top end or bottom end has melted? What next if I was you. Russ

Check endfloat on the crank..

J.

in article 3V1Ve.1084$le5.719@amstwist00, P.J. Berg at snipped-for-privacy@gmail.com wrote on 9/11/05 3:07 PM:

Oh yeah... it's floating.... and makes a nice clunk-clunk as I pull on the pulley. Isn't it supposed to be like .006 float or something?? I must have like .090

hmmmmmmmmm..... any one have a favorite place for cheap longblock in So Cal??

Thrust bearing gone south..

J.

Cruzan Dark Rum for those affected by the Cuban trade embargo.

Jan

in article XeeVe.1104$le5.797@amstwist00, P.J. Berg at snipped-for-privacy@gmail.com wrote on 9/12/05 5:10 AM:

So.. I am doomed after all. I'm guessing the "thrust Bearing" might also be called "main bearing"??

Is there any cheap salvage for this engine or am I going the longblock route? Too hard to say without a teardown and inspection or is this thing always terminal?

Thanks!

I'm with Jan here............. A nice tall drink and a Good meal...........maybe even a nap.

No sense killing yourself over the mostly dead.

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MUADIB®

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If A Quiz is Quizzical, What is a test?

The Peacemaking Meeting scheduled for today has been cancelled due to a conflict.

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