Little tapping when start up

aamt07 · 10-24-2010, 10:20 PM

I had the same problem with my supra. When you crank it up it made a tapping noise sounded like aluminum and metal slapping together. After i took the engine out and dissected it i found out that it was a bad rod and a bad piston. The engine oil rest at the bottom and is rather thick, when you start it up and let it run a little while it heats up and thins out making it lubricate all internal components. Thats the reason why it stops knocking. I hope yours isnt as bad as mine once was! its a pain in the rear. also one other thing you could do is take off the oil cap I think you can see cam gears from there shine a light and see if you have any wear as far as scratches or chips taken out of cams.

10-24-2010, 10:20 PM	#14
aamt07 Stock Join Date: Oct 2010 Location: houston, Tx Posts: 24	I had the same problem with my supra. When you crank it up it made a tapping noise sounded like aluminum and metal slapping together. After i took the engine out and dissected it i found out that it was a bad rod and a bad piston. The engine oil rest at the bottom and is rather thick, when you start it up and let it run a little while it heats up and thins out making it lubricate all internal components. Thats the reason why it stops knocking. I hope yours isnt as bad as mine once was! its a pain in the rear. also one other thing you could do is take off the oil cap I think you can see cam gears from there shine a light and see if you have any wear as far as scratches or chips taken out of cams.