engine knock???
06-07-2014, 06:44 PM
#14
Join Date: 03-12-2014
Location: Earth
Posts: 8
Archoil.....interesting product. But I doubt if it would correct an engine mechanical problem. Might be a "Band-Aid" approach, covering the underlying problem.
Excessive valve train, or engine knock (if it is) if far different than spark knock do to low octane or poorly blended gasoline, imo.
Excessive valve train, or engine knock (if it is) if far different than spark knock do to low octane or poorly blended gasoline, imo.
11-06-2014, 04:09 PM
#15
Member
Join Date: 04-09-2010
Location: Traverse City
Posts: 46
I haven't been on the forum in a while, but just learned a HARD lesson about the timing chain guides. My '07 was rattling at start up since the spring time, first once a week, then once or twice and eventually every time I started it. I knew it wasn't normal, but it started happening so often I thought maybe it WAS normal. It went away after a minute of driving, after all!
On October 16 the car went in the shop because the CEL came on and the error code was a bad camshaft position sensor. Turned out the sensor was fine, it was the rapidly degrading timing chain, guides and bent valves that were the problem!
The repair is nearly finished, but after nearly a month in the repair shop and $1600 to $2000 to fix the damn thing I encourage any owner to get it inspected AS SOON AS the noise starts. And I'd just paid the damn loan off on the 15th...
On October 16 the car went in the shop because the CEL came on and the error code was a bad camshaft position sensor. Turned out the sensor was fine, it was the rapidly degrading timing chain, guides and bent valves that were the problem!
The repair is nearly finished, but after nearly a month in the repair shop and $1600 to $2000 to fix the damn thing I encourage any owner to get it inspected AS SOON AS the noise starts. And I'd just paid the damn loan off on the 15th...
11-06-2014, 04:26 PM
#16
Platinum Member
Join Date: 05-09-2006
Location: "Upland" Mesa, Arizona
Posts: 6,805
I'm interested in the results in comparison to other oil analysis' that you had prior to the use of this product.
I do know there is a company producing nano oil. Last I looked it was terribly expensive though.
11-06-2014, 05:14 PM
#17
Platinum Member
Join Date: 12-06-2009
Location: Alabama
Posts: 11,366
I haven't been on the forum in a while, but just learned a HARD lesson about the timing chain guides. My '07 was rattling at start up since the spring time, first once a week, then once or twice and eventually every time I started it. I knew it wasn't normal, but it started happening so often I thought maybe it WAS normal. It went away after a minute of driving, after all!
On October 16 the car went in the shop because the CEL came on and the error code was a bad camshaft position sensor. Turned out the sensor was fine, it was the rapidly degrading timing chain, guides and bent valves that were the problem!
The repair is nearly finished, but after nearly a month in the repair shop and $1600 to $2000 to fix the damn thing I encourage any owner to get it inspected AS SOON AS the noise starts. And I'd just paid the damn loan off on the 15th...
On October 16 the car went in the shop because the CEL came on and the error code was a bad camshaft position sensor. Turned out the sensor was fine, it was the rapidly degrading timing chain, guides and bent valves that were the problem!
The repair is nearly finished, but after nearly a month in the repair shop and $1600 to $2000 to fix the damn thing I encourage any owner to get it inspected AS SOON AS the noise starts. And I'd just paid the damn loan off on the 15th...
11-07-2014, 05:29 PM
#19
Moderator
Join Date: 01-23-2009
Location: Fredericksburg,VA
Posts: 25,326
Did you see post #13?
If there is slop in the chain at 200K it most likely is NOT the easy fix. A couple of mechanics I know swear that the guides are only good for 70K, I have not seen documentation, but I have seen the guides after 100K and it was not a pretty sight. They are made out of plastic (or some such polymer) and are intended to be rubbed by a piece of irregular steel for millions of miles a month, they wear out.
The "tensioner fix" is sometimes good, but not a substitute for actually looking at the problem.
Oh, and the camshaft SENSOR is very rarely the problem, it usually means a bad chain/guides/tensioner. The sensor is pretty much just an electromagnet with no physical contact and no moving parts, they can go bad, but mostly throwing parts at problems.
If there is slop in the chain at 200K it most likely is NOT the easy fix. A couple of mechanics I know swear that the guides are only good for 70K, I have not seen documentation, but I have seen the guides after 100K and it was not a pretty sight. They are made out of plastic (or some such polymer) and are intended to be rubbed by a piece of irregular steel for millions of miles a month, they wear out.
The "tensioner fix" is sometimes good, but not a substitute for actually looking at the problem.
Oh, and the camshaft SENSOR is very rarely the problem, it usually means a bad chain/guides/tensioner. The sensor is pretty much just an electromagnet with no physical contact and no moving parts, they can go bad, but mostly throwing parts at problems.
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