While I was going down the interstate at a rather high rpm, it lost a ton of power and would not downshift or pickup unless I was on the floor, oil pressure dropped to zero when idle. Now theres a very noticeable knock coming from under drivers side valve cover.

Couple questions
whats the lenght? 7.2 I think just checking
What chromoly push rods from summit will fit my car? A link would be really nice.
I know theres 2 sizes 5/16's and 3/8, im guessing ours is 5/16?
Top tip style-ball or cup?
Use with guide plates is no correct?

 

I would confirm your problem before buying any parts. Pushrods are not going to affect your oil pressure.

 

This is quite odd that im telling you this but, it now has half oil preassure (normal) and starts normal and does not knock to the naked ear.
Now onto what else could be wrong? I can pull my crank in and out further then normal, The knock was coming from the drivers side underneath the valve cover what else could it be? This is all roughly 9-10 hours after it was on its death bed. Except for the crank, be that way for atleast 10k miles.

 

With no pushrod in the car there is nothing to hold the lifter in the bore, so if the lifter came out of the lifter bore that would = no oil pressure. I find it kind of hard to beleive you bent a pushrod or broke on just under normal driving though. But if you need 7.15" pushrods I have some for sale, check the link out in my sig.

 

i was at 6.3 grand, dunno if that helps you.

 

a lifter will not come ouf of the bore thats what the sheet metal piece does in there. a push rod will not make it loose oil pressure, i had it happen 2 times, both times I took valves out.

 

Ok then its possible. What is your valvetrain setup? My friend actually broke pushrods in half when he was using the cheap ones.

 

That sheet metal piece won't do anything to hold the lifter in the bore since it is just flimsy sheet metal.

 

I have stock valvetrain.

Took the rods out and non of them were bent/exsesively worn anywhere.

 

You guys think maybe the lifter collapsed then uh picked itself back up (this is clearly a random I dont know what im talking about guess).

 

Any ideas guys? went from haveing no oil pressure at idle and knocking under drivers side valve covers, to no knock and good oil pressure the next day?

 

I would drop the oil pan. It takes like 30 minutes and you can reuse the seal.

Make sure you didn't spin a bearing. A collapsed lifter wouldn't cause the car to lose THAT much power, or effect oil pressure.

Drop the pan and check the bearings, driving with it, if it is a bearing, will cost you a lot more if you deal with it after it's catastrophic as opposed to now.

 

So possibly a spun bearing even though it no longer has any signs of being damaged?

 

That "sheet metal piece" does nothing more than hold the lifter dog bones in place.
Have you ran the engine to where the OIL (not coolant) is at operating temp? Oil takes a lot longer to heat than coolant. You run the engine while the oil is cold it will be thicker giving you a better oil pressure reading yet masking the problem.
However I don't think it's a good idea to run the engine just to confirm what's already taken place. Zero oil pressure and a knock is never good. If you start the engine you could further the damage.

 

ok, I figured the oil pressure would atleast be down a little bit from normal when its cold, but I guess thats not how it works. With that being said I wont be driving the car to prevent further damage. Thanks