learned about viscosity breakdown today

[westofb]

Originally Posted by OleBlue79

Your lucky you didn't round the cam lobe. Good luck!

I would be shocked if your cam is okay...if you ground that much off the lifter, I would bet the cam isn't in a one condition.
When you soak the lifters overnight, are you using a push rod to pump them up prior to install? I usually soak them too, but once they are submerged in oil, I take a push rod and slowly push on the tops of them, you will see air bubbles come from the lifter, it doesn't take a lot of pressure. I then let them sit overnight and repump then again just before installing them, they will get to the point that no bubbles come out of them. I sure everyone has opinions on how to do this, this is just the way I have done it with no problems.

[spinem]

ouchhhhh! well glad u figured it out!!! sir, may i lend some advise, spare no exense on the valve seals, those tiny donuts they ship /w/ a kit are junk! spend 35 and get quality that will last 20yrs++

good luck!

[BigBlocksRule]

Sorry to be the bearer of bad news, but you're gonna have to pull that engine and go through it. Any metal shavings you have are now distributed throughout your engine. Even though your cam lobe is still there, it's damaged - bet on it. You'll need new cam, main and rod bearings, the ones you have will have metal shavings embedded in them. Main and rod bearings will now start grinding on the crank.
I've seen similar scenarios several times and it pretty much always ends the same way. You can bandaid it now with new lifters, but the contamination by metal particles will continue to cause problems until they're cleaned out.

TIP OF THE DAY: Step up to a hydraulic roller cam.

[powerdriver 1958]

You have a bad cam and a motor full of metal,The oil filter is AFTER the oil pump so I'm betting a bunch of metal has gone through the oil pump.....I know thats not what you wanted to hear.

[hotrod_991]

yea im alittle conserned about the cam also. I got it all put back together today and its running just as it did when we first built it but I will end up pulling the cam here in a few months I want to change it out anyway the thumper sounds fun but I think I want to go roller. I only drive it maybe twice a week if that so should be fine till i can pull it out and go back through it. Thanks for all the help yall. Im just happy to have her back running good again.

[68GMCCustom]

as far down as that lifter is...I'd bet there's not much left of that cam lobe.

[hotrod_991]

its not missing or anything like that and its seems to have plenty of power throught the rpm range.

[BigBlocksRule]

You might have gotten very lucky.
Run a good filter, that'll help more than anything.

[cableguy0]

If you run that engine like that. You can forget about reusing the bottom end when you switch cams. You will be doing a complete rebuild. That cam is going to continue to wipe out. Its trashed regardless if the valve is still moving some. Your just asking for a much bigger problem.

[OleBlue79]

It will pop out the exhuast or kind of cough cough through the carb at certain RPMs. Sometime you won't even notice except, like I said at certain speeds. I a 69 Longhorn with the 402 and hit had a flat spot but you could only tell it at 45 MPH. It would just pop out the exhaust. Like, pop.....pop.......pop,pop. Then when you'd speed up some it would quit.

[hotrod_991]

cableguy I agree that i need to get the cam changed and will most likely be swapping out the main and rod bearings at the same time, just dont have the means to do that at the moment. Going to have to pray it doesnt tear up the crank or pistons till I can do it. I only drive it maybe twice a week if that usaully about 50 miles amonth

[cableguy0]

Anytime there is bearing damage there is crank damage. The tolerances are designed for oil to flow through not metal. As soon as the bearings get torn up a bit the clearances open and oil pressure is lost because the oil is trying to fill a bigger space. The oil just cant do it and the bearings will contact the crank.

[68GMCCustom]

put some strong magnets on the bottom of you oil pan....and hope they do the trick.

[hotrod_991]

ok i will deff try the magnet trick never thought of that. I know I will be changing main and rod bearings when i swap the cam I have already accepted that

[68GMCCustom]

...at the least...and just hope you don't wind up with crank or rod journal damage.

[hotrod_991]

yea deff praying its just the bearings. i doubt ill drive it more that twice between now and when i pull the pan off it. have to get it back to the house into the garage when i move to ft hood. ill be towing it there.