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I rebuilt a 360 mopar for my truck and finally got it in and fired it up and as soon as I did it instantly started to make a rattle. Now I was terrified that my hard work was just going away but then I got to thinking. Is it possible that the brand new hydraulic lifters are tapping. It’s not a fast tap it’s a steady one. I’m praying that it isn’t rod knock. I need some advice. Thanks.
Also. I pulled the valve covers and checked the torque on the rocker arms and it it’s correct but I can still push down on the lifters and compress them. So I’m hoping that they just haven’t pumped up yet. How long would it take? It’s pretty darn loud
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My suggestion would have been to primed the engine.
With the distributor removed insert a mating oil pump shaft and spin the pump with a drill to pressurize the oil system.
In your situation though:
I would hope you did soak all the lifters in an oil bath prior to installation.
Used assembly lube where needed / recommended on all surfaces.
Also your using the correct break in oil recommended.
I would consider following the first suggestion and remove the distributor and prime the system.I primed the engine prior to starting it. There is plenty of oil pressure. I used plenty of assembly lube on the bearings and cam and lifters and such. I didn’t soak the lifters. I just coated them with assembly lube because I was told that they will pump themselves up. When i removed the valve cover I could push down on a couple push rods still and compress the piston. I’m assuming that means that the lifter hasn’t pumped up yet. And I’m hoping that that is the source of the sound.
I didn’t soak the lifters. I just coated them with assembly lube because I was told that they will pump themselves up.
Well now you’ve learned one lesson.
I do hope for your sake they recover quickly.
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