engine noise knock x350 xj8 2004
#1
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Hi Guys & Girls, I hope someone has some good news for me...
Engine noise/knock.
I have heard a little noise when I start the car sometimes, sounds like a valve noise to me, not sure.
But now:
I just had an oil change and the noise has gotten much much worse. I only noticed the noise after I drove the car down the highway for about 5 hours.
note: My rear defrost light comes on when I start the car. I had this trouble before when oil covered my MAP sensor (I think) - I think that is in the hose connected to the pcv valve - yes/no? Once I replaced the sensor the light went out.
It maybe more of a tick tick than a knock, but it is loud now. The car seems to still run ok, maybe. I hope someone can tell me this is not a costly fix, but I bet I'm in a world of hurt. Merry Christmas. Help.
ps I have spent at least 10,000 on this car in one year and I have only owned it for a year, no lie. I'm guessing that must be a all time record.
Engine noise/knock.
I have heard a little noise when I start the car sometimes, sounds like a valve noise to me, not sure.
But now:
I just had an oil change and the noise has gotten much much worse. I only noticed the noise after I drove the car down the highway for about 5 hours.
note: My rear defrost light comes on when I start the car. I had this trouble before when oil covered my MAP sensor (I think) - I think that is in the hose connected to the pcv valve - yes/no? Once I replaced the sensor the light went out.
It maybe more of a tick tick than a knock, but it is loud now. The car seems to still run ok, maybe. I hope someone can tell me this is not a costly fix, but I bet I'm in a world of hurt. Merry Christmas. Help.
ps I have spent at least 10,000 on this car in one year and I have only owned it for a year, no lie. I'm guessing that must be a all time record.
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#2
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I wish that were true...try owning one of the old Lucas Jags!
Not sure about your problem, but my guess would be valve train noise. Did you change to a thinner oil? If so, going back to a thicker oil may help.
Also, a small exhaust leak can sometimes sound like a ticking noise. For exhaust, it is usually loudest right after starting a cold engine or when loading it up a hill/ acceleration etc.
#3
#4
#5
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I was wondering if oil wasn't added to the oil filter first maybe a air block could stop the oil from getting in the engine and causing a problem. Yes, the oil is thin because it is 100% synthetic. I can add a additive to thicken it but I think something is wrong now. thank you for the quick reply!
#7
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I thought the defrost might come on by itself as well, but in my case it comes on when it is 80 degrees outside. And when I replaced that sensor it stopped doing that. Very strange! I don't know if it is related. How does oil get in that pcv tube anyway. ps I replaced the pcv valve.
and..... Thanks for the reply!!!! I need all the info/help I can get.
and..... Thanks for the reply!!!! I need all the info/help I can get.
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#9
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I don't know if anybody is still watching my thread... I hope someone is, maybe a mechanic. I started the car today - same sound, popped inside for a second, came back out, the car was spitting and sputting and the engine was clearly slowing down and slowing down fast. I jumped in and turned it off. Anybody? I think it must be done.
fyi: This is my second Jag, both engines failed. I do all the regular maintenance - I am religious about it. Doesn't seem fair.
fyi: This is my second Jag, both engines failed. I do all the regular maintenance - I am religious about it. Doesn't seem fair.
#10
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innzane
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09-02-2015 10:08 AM
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