Rebuilt Motor Knock
#11
#12
yep. That is the plan. Bearings are on the way and I have extra plastigage from when I rebuilt this motor... 28 miles ago... absolutely unbelievable that I already am doing this. If its not the rod bearings what else could it be do you think? Can't be heard with a stethoscope anywhere but the oil pan. Very very faint. It's a rhythmic noise. Goes up a little with rpm and when the revs start to drop it goes away. Almost like there is no load on the bearings and the noise dissapears.
#13
#14
no but thats a good idea. Pretty sure it won't go away but that's easy enough of a test. It's definitely quiter, almost not even there, when cold. It's not an oil pressure issue though. I'm just assuming that when the oil does thin a little the noise becomes apparent because because of a slightly larger clearance. So I'm really hoping it's as simple as bearing. As bad as that sounds for an engine with only 28 miles and a lot of money...
#15
all pistons and wrist pins were replaced and the pins well oiled before install. All bearings were coated in tons of assembly lube. Completely filled the oil filter before startup and ran the engine over without plugs and injectors disconnected to get at least some oil moving. Really don't understand how the noise came about as I was careful with everything but crap happens I guess. Rod bearings are on the way.
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BClark_35 (04-05-2022)
#16
In the future, when priming the oiling system on a Chrysler V8 engine, I prefer to use an oil pump priming tool. This way, you can ensure that oil is circulating throughout the engine. To use the tool, pull out the oil pump drive from under the distributor, insert the tool and use a reversible 1/2" drill to turn the oil pump with the tool (which is nothing more than a long hardened hex shaft designed to turn the oil pump). I usually slowly turn the motor by hand using a 1-1/4" socket and a ratchet. Here is a link to a Chrysler oil pump priming tool - https://www.summitracing.com/parts/sum-901013
#17
#18
well I don'tI have a picture because I was freaking out inside. The oil wasn't a milky brown color. It was normal oil color, and then a small line of white slightly mixed with the normal oil. Yea i need to verify what the temp actually is. I'll just freak if i ran it hot when the temp sensor was telling me it was normal. I guess for now I'm gonna drive it and watch my coolant level. If I did run it hot where would my issue likely be? As long as the block isn't warped or damaged I would be happier. Although the heads are also brand new so I'd hope it's just a head gasget.
#19
Do you have an infared temperature gun? (see this for examples - https://www.harborfreight.com/search...perature%20gun) If so, you can point it at the temperature sensor to determine the approximate temperature the engine is running at or use a OBD2 scanner to read the sensor's temperature.
What brand of thermostat did you use? Personally, I only use Stant Superstat thermostats, as they have proven to be the most reliable. Other thermostats, even when brand new, don't tend to be very well made and have a tendency to fail right out of the box.
What brand of thermostat did you use? Personally, I only use Stant Superstat thermostats, as they have proven to be the most reliable. Other thermostats, even when brand new, don't tend to be very well made and have a tendency to fail right out of the box.
Last edited by AtomicDog; 04-11-2022 at 10:14 AM.
#20
Do you have an infared temperature gun? If so, you can point it at the temperature sensor to determine the approximate temperature the engine is running at or use a OBD2 scanner to read the sensor's temperature.
What brand of thermostat did you use? Personally, I only use Stant Superstat thermostats, as they have proven to be the most reliable. Other thermostats, even when brand new, don't tend to be very well made and have a tendency to fail right out of the box.
What brand of thermostat did you use? Personally, I only use Stant Superstat thermostats, as they have proven to be the most reliable. Other thermostats, even when brand new, don't tend to be very well made and have a tendency to fail right out of the box.