What would cause the engine to knock (hammer)

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When I got the car it was ticking, pretty loudly and pored white smoke out the exaust. I was told it was the rod barrings, the top barrings showed signs of wear so I replaced them. Finally got it back together and started it up and it hammered louder than before. I did notice it was not poring white smoke anymore. The check engine light is on and has been on from what I understand. I haven't been able to run it for codes yet, I'm afraid to leave it running for long,(I don't have a scanner) and don't want to cause anymore damage.

dani89 in Cleveland TN

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May 18, 2015

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1 Reply

Popular Answer
csubak30on May 18, 2015

Need to get the codes......also, white smoke usually means the presence of water in the combustion process. Either coming from the fuel tank (having moisture in it) or a bad head gasket. May need to take to a shop for a diagnosis.

Reply
dani89on May 18, 2015

Ya I figured the codes would help, just don't have access to one at the moment. I am the shop lol. I was Successful on the exaust. It no longer smokes but it's hammering pretty bad. Though I only ran the motor for a couple mins. I appreciate your help though. I thought maybe someone else has had this problem or knows what could be causing it. ThanKS again

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