rod knock or lifters? (SOLVED)

[Edgar7654]

ok i have a problem with my car i have the bp engine in which i bought used with 93k on it however i have this noise that sounds like 20 little guys r beatting on my engine and each one has 2 hammers.... is this rod knock or could my oil pick up be blocked by carbon and rust there for the oil isnt picking up well enough to the lifters? it goes away at 2k it sounds normal and comes back at 1000rmp or 3000 rpm and up i will be changing the rod bearing here soon i just want some input on what you guys think it may be thank you and god bless you

also will be writing a engine swap for 91 bp obdi to 95 obd2 soon i have no cell codes the only problem is i got the wrong engine.....
http://www.youtube.com/watch?v=KRg9t_Lk6_A



the oil pick up was full of sludge dropped the oil pan and cleaned 8-9 oz of sludge and then it was good to go

[mitmaks]

maybe you can post a vid or it running. Rod knock is different from valve ticking.

[Dark_Rider2k3]

Hard to tell but sounds like litter tick. Did you just put the engine in?

[Edgar7654]

yes i just put the engine in (teenager) make stupid decisions like have sex insted of putting oil on my car and blow it up while racing a mustang with my oil pressure low thinking ill put oil after the next exit.... now i called the machine shop and a crank kit is $140 comes with crank and main bearings and rod bearings

or should i get the crank re-grounded and buy the bearings the reason i ask is the crank for my this car BP engine is forged and idk if the one from the crank kit is cast or forged.....

[Dark_Rider2k3]

yes i just put the engine in (teenager) make stupid decisions like have sex insted of putting oil on my car and blow it up while racing a mustang with my oil pressure low thinking ill put oil after the next exit.... now i called the machine shop and a crank kit is $140 comes with crank and main bearings and rod bearings

or should i get the crank re-grounded and buy the bearings the reason i ask is the crank for my this car BP engine is forged and idk if the one from the crank kit is cast or forged.....

so you pretty much didn't have enough oil in it? ouch...

[Ryan]

That crank kit seems very reasonable. My regrinds cost $120, plus bearings on top.

[Edgar7654]

yea will regrinding it be just as reliable as new? cuz the bp has a forged crank and idk what the crank kit is made of im planning on boosting soon im only missing the manifold and the oil lines i plan on running 8 or 10 psi also ryan thank you for convincing me to do a swap insted of keeping my blown b6 its deffinatly faster than the b6 even with rod knock... besides my other engine was oil starved there could be other problems in the future this one at least has 93k even with rod knock

[Ryan]

Once you pull it apart you'll know what happened.

A reground crank is meh. The new surface finishes and clearances will be better than whatever you had before you spun it, so its still an upgrade, but not as good as stock.

Ask the company what their cranks are made of (steel grade if they'll tell you, forged or cast), and what sort of heat treatment & surface treatments they've done.

carburized, nitrided, polished x times, blah blah blah, whatever they can sell.

[Edgar7654]

i think its the lifters i took the engine out put it on a stand and notice my fly wheel bolst were lose like really loose and it moved up and down since i used bolt tight green which makes sense why it sounds like death... now the rods r tight and compared to what i seen before when rod knock occurs there is no play i cant move them at all also my oil pick up was full of mud like sludge and i pulled 8.3 oz of sludge from the bottom of the pan which could be why the lifters werent getting enough oil... how do i know if i have rod knock now that the engine is out on a stand....

[Ryan]

Well when diagnosing s---, its impossible to diagnose user error. I suggest issues that could naturally go wrong, not that you forgot to tighten your flywheel bolts... how could anyone possibly predict that, aside from you.

Clean it out, tighten it up, check your bearings anyway (take off the caps and bearings and inspect for damage, either from spinning or starvation from the plugged pickup).


You can't miss a spun bearing.

[mitmaks]

On our Subaru bearings were so bad, piston was knocking against head. Fortunately for me it didn't bend valves but I had to pay for new shortblock $1700