Andrew Barker
Newbie
I know this a a double post, but I have more information to add as well as a video of the noise.
Okay, to start I would like to say that this is not a truck, but infact a 92 Buick roadmaster wagon. This forum is my last resort as I’ve had no success anywhere else.
Take a seat this is gonna be a long one. Back in June I bought a 1992 Buick roadmaster wagon that needed it’s 700r4 rebuilt. I was told it has 200,000km on it and the cluster which reads 300,000 was swapped out of a different car. So I’m not really sure the mileage on it. Anyway, the oil was pretty black when I bought it so I changed the oil to 5w30 conventional with a fram filter. Oil pressure was good. 50 pounds on startup idle and about 25 when warm. It had been warm basically every day so I always had the windows down and music playing. One day it was raining maybe a month and a half after I bought it, and I had the windows up. I noticed that about 1500 to 1550 there was a knocking sound. Louder when the car was cold and more quiet as the car warmed up. Sometimes completely gone, sometimes barely there. NOTE THAT IT ONLY HAPPENS IN DRIVE, NOT IN PARK IF I REV IT. I am also ABLE to put my foot on the brake and gas and get it to make the noise while not moving. If I hold it there for a couple seconds the noise seems to slowly fade away and the be gone for the rest of the drive SOMETIMES. And if you get up to around 1600rpm the noise went away. I thought that it was probably timing related because my four cylinder mustang sounded the same until I reset the timing, so I just drove like that for another couple months because the hold down bolt wouldn’t move. Maybe two weeks ago I checked the timing and saw it was set to 0 degrees. That’s when I became a little concerned. I was able to get the hold down loose and adjusted the timing to 4 degrees atdc. That did not help or change anything. I was thinking piston slap but I’m not sure sure as it’s still there a bit when the car is warm. The car runs really well and seems strong. Burns no oil. My next thought is to see what temp thermostat is in the car because it has a new rad, so it is possible that they had an overheating issue and put in a 160f instead of a 195. I bought a 195, just haven’t installed yet, and now I might be waiting even longer to install it because now there is a giant oil leak from the top of the engine coming from either the intake manifold or distributor gasket. I am so fed up with this stupid car. I bought a tbi because they are supposed to be more reliable than the LT1. Not sure bout that one in my case.
The current oil in the car is 5w30 full synthetic high mileage with an ac delco filter.
Any thoughts will be appreciated.
This is my first Chevy, my other two cars are Foxbody’s
Okay, to start I would like to say that this is not a truck, but infact a 92 Buick roadmaster wagon. This forum is my last resort as I’ve had no success anywhere else.
Take a seat this is gonna be a long one. Back in June I bought a 1992 Buick roadmaster wagon that needed it’s 700r4 rebuilt. I was told it has 200,000km on it and the cluster which reads 300,000 was swapped out of a different car. So I’m not really sure the mileage on it. Anyway, the oil was pretty black when I bought it so I changed the oil to 5w30 conventional with a fram filter. Oil pressure was good. 50 pounds on startup idle and about 25 when warm. It had been warm basically every day so I always had the windows down and music playing. One day it was raining maybe a month and a half after I bought it, and I had the windows up. I noticed that about 1500 to 1550 there was a knocking sound. Louder when the car was cold and more quiet as the car warmed up. Sometimes completely gone, sometimes barely there. NOTE THAT IT ONLY HAPPENS IN DRIVE, NOT IN PARK IF I REV IT. I am also ABLE to put my foot on the brake and gas and get it to make the noise while not moving. If I hold it there for a couple seconds the noise seems to slowly fade away and the be gone for the rest of the drive SOMETIMES. And if you get up to around 1600rpm the noise went away. I thought that it was probably timing related because my four cylinder mustang sounded the same until I reset the timing, so I just drove like that for another couple months because the hold down bolt wouldn’t move. Maybe two weeks ago I checked the timing and saw it was set to 0 degrees. That’s when I became a little concerned. I was able to get the hold down loose and adjusted the timing to 4 degrees atdc. That did not help or change anything. I was thinking piston slap but I’m not sure sure as it’s still there a bit when the car is warm. The car runs really well and seems strong. Burns no oil. My next thought is to see what temp thermostat is in the car because it has a new rad, so it is possible that they had an overheating issue and put in a 160f instead of a 195. I bought a 195, just haven’t installed yet, and now I might be waiting even longer to install it because now there is a giant oil leak from the top of the engine coming from either the intake manifold or distributor gasket. I am so fed up with this stupid car. I bought a tbi because they are supposed to be more reliable than the LT1. Not sure bout that one in my case.
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The current oil in the car is 5w30 full synthetic high mileage with an ac delco filter.
Any thoughts will be appreciated.
This is my first Chevy, my other two cars are Foxbody’s
