do I need a new engine?
do I need a new engine? Well my car just said **** you, and started to knock, A STADY TAPING SOUND SO I'M GUESSING ITS A ROD,. long story: I just got a truck last Friday so i parked the 2000 z28 and been driving the truck , this morning i started the z28 an damn damn damn a ******* knocking noise under the hood fuuuuck. it was running fine before no ******* warning or nothing , just like that. did the ******* car got jealous lol, i changed the oil like 100 miles back, and the gas tank is full with ******* premium gas fuuuuck. engine has 115 000 miles and i drive like a grandpa, never raced or burned tires so why is this happening to me why why why / end rant
Now fellow ls1 tech ers any ideas where to go from here? I really liked the car
I posted this on the Texas section but this may be a better place
Now fellow ls1 tech ers any ideas where to go from here? I really liked the car
I posted this on the Texas section but this may be a better place
TECH Regular
Joined: Aug 2010
Posts: 462
Likes: 0
From: houston, texas
if you have some cash rebuild it. i have a couple stock cranks and rods. wouldnt cost too much to go back stock with it. you could buy a short block from someone, but you never know what youre gonna get. where exactly are you located?
Well my car just said **** you, and started to knock, A STADY TAPING SOUND SO I'M GUESSING ITS A ROD,. long story: I just got a truck last Friday so i parked the 2000 z28 and been driving the truck , this morning i started the z28 an damn damn damn a ******* knocking noise under the hood fuuuuck. it was running fine before no ******* warning or nothing , just like that. did the ******* car got jealous lol, i changed the oil like 100 miles back, and the gas tank is full with ******* premium gas fuuuuck. engine has 115 000 miles and i drive like a grandpa, never raced or burned tires so why is this happening to me why why why / end rant
Now fellow ls1 tech ers any ideas where to go from here? I really liked the car
I posted this on the Texas section but this may be a better place
Now fellow ls1 tech ers any ideas where to go from here? I really liked the car
I posted this on the Texas section but this may be a better place
In the same boat as you now. Mine started sunday
It could be just lifters. Dont assume the worst yet. Did you let it run long enough to see if it goes away shortly? Also, do a compression check. I bet it's just a lifter from sitting. That is quite common. They just had time to bleed down since it sat longer than overnight.
@ msydow no don't have cash, a mechanic that i know since 1996 went to look at it and just by hearing it said it can be fixed but it wold be better if i get a new engine cause if it gets rebuild it wold do the same in say 25 000 miles. i live by Dallas
@ kevins200ls1 yea this sucks big time its a fun car to drive.
@joe car i was hoping it was that or the oil pump, but the mechanic don't think so, oil presure is normal....cold 45 .......warm 25
@Iwgf , no haven't done anything yet
@blue98z, no i didn't let it run yet, first time i started it, the knocking sound started and i turned it off within 4 seconds, I tried to re start to See if it wold go away, but the battery went dead. second time i started it was when i jumped start the battery , for about 15 seconds, third time when the mechanic went to look at it 10 seconds,
I have read that it may be carbon deposits and to let it run to clear it up, but i don't wanna make it worse
@ kevins200ls1 yea this sucks big time its a fun car to drive.
@joe car i was hoping it was that or the oil pump, but the mechanic don't think so, oil presure is normal....cold 45 .......warm 25
@Iwgf , no haven't done anything yet
@blue98z, no i didn't let it run yet, first time i started it, the knocking sound started and i turned it off within 4 seconds, I tried to re start to See if it wold go away, but the battery went dead. second time i started it was when i jumped start the battery , for about 15 seconds, third time when the mechanic went to look at it 10 seconds,
I have read that it may be carbon deposits and to let it run to clear it up, but i don't wanna make it worse
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It is odd for knocking to start on a cold start like that. I tend to agree with the others that have said it is a lifter that has bled down. If you have only let it run for 4, 10, and 15 seconds how do you know the warm oil pressure is 25 lbs? A rod bearing will normally cause the oil pressure to fluctuate up and down after the oil is warm, but this is not 100% accurate.
I say put a can of seafoam in the oil and let the engine idle for 20 minutes or so and see what happens. A stuck lifter should pump up by then and this will also give you a chance to monitor oil pressure after the engine gets hot. As long as you don't go for a ride or rev the engine much over idle there's not much chance of doing more damage.
If the tapping doesn't stop then another possibility is that the flywheel has cracked. This can sound like an engine knock and would explain why it happened on start up. This can be tough to diagnose but if you put the car in gear with your foot on the brake it may change the tone of the knock or eliminate it completely.
I say put a can of seafoam in the oil and let the engine idle for 20 minutes or so and see what happens. A stuck lifter should pump up by then and this will also give you a chance to monitor oil pressure after the engine gets hot. As long as you don't go for a ride or rev the engine much over idle there's not much chance of doing more damage.
If the tapping doesn't stop then another possibility is that the flywheel has cracked. This can sound like an engine knock and would explain why it happened on start up. This can be tough to diagnose but if you put the car in gear with your foot on the brake it may change the tone of the knock or eliminate it completely.
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Verdad Gallardo and the car was parked on the street so today i put in the garage, i didn't let it get warm maybe 2 minutes, when i put in on drive it did get quieter but not much.
one more thin i forgot, I had the cutout open all the time, but i closed it when i changed the oil about 100 miles back so dunno if the back pressure, and the weather being the first cold night had anything to do with it?.
oh and i did the full sea foam treatment oil, fuel and brake booster about 6000 miles back, i changed the knock sensors about 1 000 ago and I must say that the i left intake spotless, used about 4 cans of intake cleaner and some sea foam deep creep.
ooh i didn't use all four cans to clean the intake, i meant to say clean around all the dirt and grease around where the intake plenum goes and the plenum itself, so not much of the cleaner got inside the engine
thanks for giving me hope 5.3 jimmy, and yea i assumed the oil pressure is normal when warm, cause its normal cold when i looked at it those three times lol if that makes sense.
and the car was parked on the street so today i put in the garage, i didn't let it get warm maybe 2 minutes, when i put in on drive it did get quieter but not much.
one more thin i forgot, I had the cutout open all the time, but i closed it when i changed the oil about 100 miles back so dunno if the back pressure, and the weather being the first cold night had anything to do with it?.
oh and i did the full sea foam treatment oil, fuel and brake booster about 6000 miles back, i changed the knock sensors about 1 000 ago and I must say that the i left intake spotless, used about 4 cans of intake cleaner and some sea foam deep creep.
and the car was parked on the street so today i put in the garage, i didn't let it get warm maybe 2 minutes, when i put in on drive it did get quieter but not much.
one more thin i forgot, I had the cutout open all the time, but i closed it when i changed the oil about 100 miles back so dunno if the back pressure, and the weather being the first cold night had anything to do with it?.
oh and i did the full sea foam treatment oil, fuel and brake booster about 6000 miles back, i changed the knock sensors about 1 000 ago and I must say that the i left intake spotless, used about 4 cans of intake cleaner and some sea foam deep creep.
TECH Fanatic
Joined: Jan 2010
Posts: 1,219
Likes: 0
From: Euless Tx
My buddys o2 m6 camaro had a bad knock and ran like poo I bought the old engine from him and tore it apart found a gaulded piston he bought a new crate ls1 installed it with headers and a borla dumped in a t56 car made 349 hp and 364 torque with the tune car was kick *** after all wass done
Staging Lane
Joined: Nov 2010
Posts: 78
Likes: 0
From: West Palm
engine has 115 000 miles and i drive like a grandpa, never raced or burned tires so why is this happening to me why why why / end rant
Now fellow ls1 tech ers any ideas where to go from here? I really liked the car
I posted this on the Texas section but this may be a better place
Now fellow ls1 tech ers any ideas where to go from here? I really liked the car
I posted this on the Texas section but this may be a better place
