So I revved my car up to around 5k rpm and let off and the car started knocking pretty bad, I shut the car off and went to see if I could figure out what it was, I couldn’t figure anything out, I started the car back up and it was knock a lot less and then I drove it for like a min and the knock completely stopped and the motor is running perfect other than a very light tick on idle, I don’t know if I spun a rod bearing and it re seated or what happened, any suggestions???
Knock then nothing
- Thread starter Sn95_riley
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Strain the oil and cut open the oil filter would be my first suggestion.
Look for metal debris etc
Also, Welcome to Stangnet
Look for metal debris etc
Also, Welcome to Stangnet
I forgot to mention that I drive a 1998 Mustang GT with the 4.6L v8 with the full PI swap done and mild cams installed full exhaust headers back, shorty headers, o/r X, flowmaster catback, SR performance CAI, I bought the car with these already being done so not certain what is all done internally
JmP6889928
You might slide out if you are going too fast.
Why would you just inadvertently rev your car up to 5000 rpm in neutral? Was the car not running well and you were trying to...........?
I know I’m an idiot
Peer pressure by a group of people is what cause it, I regret more and more by the second trust meThe car was also running perfect when it happened, motor has about 60k on it and ran like a dream
JmP6889928
You might slide out if you are going too fast.
Well...remember that 5K with a load on it (i.e.-driving down the road) versus 5K freewheeling (i.e.-sitting idle) is totally different to the engine. With the load on it, the engine is designed to push against that load, but when freewheeling, there is no push back against anything and parts become quickly disoriented.
Next time "peer" tells you to rev it up, ask them how much money they have in their pocket. And when they ask why, tell them so they can pay you for the damage it's doing to the engine. Don't let morons goad you into blowing something up so they can walk away and laugh. It's not worth it.
Next time "peer" tells you to rev it up, ask them how much money they have in their pocket. And when they ask why, tell them so they can pay you for the damage it's doing to the engine. Don't let morons goad you into blowing something up so they can walk away and laugh. It's not worth it.
wmburns
SN Certified Technician
I can promise you that IF you spun a bearing that the damage will only get worse has time goes on. This could be risking taking a condition that may be repairable with polishing and turn it into a "boat anchor".
If this were my car I would
- suggest using a borescope. Pay special attention for any PTV "witness" marks on top of the pistons.
- cut open the oil filter.
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