Tick tick tick update (rod knock) ***putting it back togethe

[Dennyboy]

allright guys did the intake on my car. drove it for a good 200 miles around and didn't beat on it. drove her today to break fast and on the way back she started ticking really loud. we towed it home thing it was a loose rocker but everything looks and feels normal. sounds like it could be a lifter????

Also, when i start the car with out the valve covers on oil doesn't come out of the tops of the rods???? like it would on an other engine that i have seen.

Where should i start? It's a 455 with and F block and J heads.

 

[pontiacgp]

Re: Tick tick tick

what's the oil pressure?

 

[custom442]

Re: Tick tick tick

oil pressure, is it changing after engine warms up. whats the installed valve height at the top of the spring, are the pushrods still round with no blockage, what rockers, cam, springs, lifters do you have, whats the clearance between rocker and valve retainer vertically, what about horizontally. How much lash are you using, have you tried tightening lash with engine running, whats the rocker stud height//about what length/how many threads down on the stud when you lash (if you have studs), did you set up the pushrods to seat on center of valves or to give the least 'roll' if you did it this way where is it hitting the valve stem (is a spring broken :shock: ), If you installed those valves did you check clearance from the spring retainer to valve seal, was this during cam break in, clearance to valve covers. if you're sure its from the top end, take out lifters check them out to see if they're good, are cam lobes still good, are the lifters ticking after it warms up on startup or before it warms up and goes away after warm up. Is it only an rpm issue, where the tick goes away at higher rpm under load after warming up (bad lifter) or vice versa.
there's about 50 more questions i didn't type out, need a lot more info than what you gave.

 

[Dennyboy]

Re: Tick tick tick

The oil pressure is at 40 psi warm. I am waiting for it to cool down to see if it ticks cold. it's hard to tell where exactly it is coming from. it sounds like the valve train. I didn't build the engine, I ended up just doing the rear main when i had the engine out before. I had to get the car out of my buddys garage. what I can tell with the covers off is that the rockers are a 1.6 steel comp cam rocker, as everything else i can see there has comp cam on it.

it ticks faster as the rpm goes up.

I have a little background in some of this stuff but not a ton. What am i looking for when i check out the lifters? What's keeping the oil from coming out? does it only come out at higher rpm?

 

[custom442]

Re: Tick tick tick

check all clearances, play with valve lash, change oil, check pushrods to see if they're round, take out and inspect lifters you'll see if the cam has chewed them up and if oil pass. are restricted and cam lobes. Do em in this order, could also be timing or exhaust, along with a mechanical problem What lifters do you have? Were they soaked properly?


edit - are you saying oil only comes out at high rpm on your pushrods/rockers? oil not coming out means you could have cheap chinese rockers with no oil passage (which isn't the case), restricted pushrods (could be the case), blockage in pushrods or lifters, air in lifters, junk in lifter bores, could even be the lifter design in question or not fitting properly in bore (not likely)

 

[Dennyboy]

Re: Tick tick tick

no oil doesn't come out, if at all it dribles a bit. From what i hear within 15 seconds of starting it i should have oil everywhere......? so you should i pull the intake and check the lifters, and rods etc? or is there something i should do first?

 

[Bonnewagon]

Re: Tick tick tick

First thing I would do is pull the valve covers, remove the distributor, and spin the oil pump with a big drill in a cut-down distributor or formal priming tool. Spin the pump for as long as it takes to get oil from the pushrods. Turning the motor over by hand while doing this will cover/uncover oiling passages. If no oil, time to dig deeper.

 

[custom442]

Re: Tick tick tick

don't rip everything apart first, check to see if you have blockage in the pushrods or lifter bores and check all clearances etc. check what parts you have before doing anything at all. if it dribbles a little bit it means you have at least something coming out. Like I say it could be the parts you're using and valvetrain geometry is giving you a knock it may not be the lifters at all, talk to your buddy or the shop who built it to help you out gotta go now

 

[Dennyboy]

Re: Tick tick tick

I bought it from a guy that had it built, the shop has been shut down for the past three months. not sure how to check clearences. I also only saw it dribble once. the engine has ben running fine the 600 miles i drove it before doing the intake and the 200 i drove it since. it also hadn't been touched for awhile before i got it.

 

[Bonnewagon]

Re: Tick tick tick

Maybe the intake swap let some crud get to where it shouldn't? At idle, the oil should be flowing well out the pushrods, not dribbling. Try loosening a rocker while spinning the distributor, and if still no oil, pull out a pushrod and blow it out with air, see if it's clean or clogged. I'm no Olds expert, but on Pontiacs, the ends of the oil galleries where the plugs are can get packed with crud and starve those lifters for oil.