changed oil to syn and now a knock
June 8th, 2010, 11:37 AM
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changed oil to syn and now a knock
I went to a shop and had my oil changed to a syn and now i have a knock not sure why am still looking they used the valvoline syn hope you guy can help thank you
June 8th, 2010, 12:02 PM
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maxxmann it shows full on the stick also i forgot to say its a 2003 silverado 2500hd ls and that after it warms a few it does go away like it might warm up and seal somthing not to sure thanks
June 8th, 2010, 1:34 PM
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ok i just started it and its a ticking noise not a knocking noise but it does go away after it warms up and it just started when i had the oil changed to a syn, not sure if its that i changed to syn or if something happened at the shop and they didnt tell me so im still looking lol
June 8th, 2010, 3:24 PM
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Oddly enough, changing to syn oil made my oil tick/knock louder. Mine was the result of 3 pistons that had worn through the skirting. I'm not sure why syn made the knock more obvious.
I'm not rolling around with a new 5.3 courtesy of GM.
I'm not rolling around with a new 5.3 courtesy of GM.
June 9th, 2010, 10:46 AM
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My 02 2500 hd 6 liter has that same noise and I have used both synthetic and conventional oil. 70,000 miles
My neighbor has a 00 2500 6 liter and his engine has the same noise, 150,000 miles.
Sorry I don't have an answer, just know that it may be the nature of the beast.
My neighbor has a 00 2500 6 liter and his engine has the same noise, 150,000 miles.
Sorry I don't have an answer, just know that it may be the nature of the beast.
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June 9th, 2010, 7:37 PM
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different engine but same problem.
350 developed a tic, i changed oil, I use 10w30 valvoline, wix filter and added 1 qt of lucas oil stabilizer. Tic when away.
might try draining the synthetic oil and trying this oil combination.
it worked for me, but then i have never used synthetic oil in my engine 90K
no question to me that synthetic has better lube properties than dino oil, but sometimes it can develop other problems since the molecules are smaller.
why did you decide to change to synthetic oil????
350 developed a tic, i changed oil, I use 10w30 valvoline, wix filter and added 1 qt of lucas oil stabilizer. Tic when away.
might try draining the synthetic oil and trying this oil combination.
it worked for me, but then i have never used synthetic oil in my engine 90K
no question to me that synthetic has better lube properties than dino oil, but sometimes it can develop other problems since the molecules are smaller.
why did you decide to change to synthetic oil????
June 9th, 2010, 8:13 PM
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Did they use the proper weight? Sounds like a lifter tap. Find a shop that has the newest BG (www.bgfindashop.com) oil flush machine. 90% of the time it will stop a lifter tap and or stop a engine from burning oil, also it is a good maintenance service.
June 29th, 2010, 8:09 PM
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i have a 200 silverado 1500 ls
350 with the same noise and i just posted a thread about it oo. hasnt been going on long...so if i find anything out ill hit u up on here.
350 with the same noise and i just posted a thread about it oo. hasnt been going on long...so if i find anything out ill hit u up on here.