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Cold engine clicking

6 messages,  Last post on Oct 31, 2009 at 7:43 AM

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#4 of 6 Re: Cold engine clicking [spike99] by chase777 Feb 09, 2008 (3:55 pm)
Replying to: spike99 (Feb 09, 2008 1:31 pm) Thanks....that confirms it and explains why the GM service center wants to dismiss this problem as nothing. I will get the oil changed and go with the 100% synthetic ASAP. I only have 61,000 original miles on this van and I am the original owner. I have always had the oil changed every 3000 miles or sooner. Thanks again for the PistonSlap.com info. I did not know what to call it other than clicking.   One thing I just thought of....when my van was 6 months old some of the oil lines were put in the wrong place and burned through, causing it to leak out a lot of oil. They fixed it under warranty and I caught it before all the oil ran out. About 2 years ago it started missing and they thought it was the fuel pump after $850.00 It was still missing. Then they found out it was the coil, dist cap, pluges, etc..basically a total tune up plus some, Ended up costing me over $2000.00 (the fuel pump would have been fine) I should probably goto another GM service center. Replies to this message: spike99 (Feb 10, 2008 8:34 am)
#5 of 6 Re: Cold engine clicking [chase777] by spike99 Feb 10, 2008 (8:34 am)
Replying to: chase777 (Feb 09, 2008 3:55 pm) Over time, the factory oil lines do leak - regardless of how they are installed. To me, the piping material of the factory oil lines must be different. Proper galvanized steel piping (instead of soft aluminum) and its rubber should be double layered - like hydronlic hose. If you shop around, some piping / machine shops create much better piping. Simply bring them your original leaking oil lines (ya, your vehicle may have to site for 7 days or so) and the shop will "clone them" to create much better piping. And, its often 1/3 the cost that GM charges. Something to think of - if you see your new oil lines starting a slow leak.   My local auto shop "wasted my dollars" chasing down a brake problem as well. Master cylinder, new front rotors (thinking the first set were warped) and new pads. In the end, they discovered it was a bad front wheel sensor - and its computer wasn't registering an error code. Its unfortunate that even "the best of the best" mechanics have difficulties chasing down certain problems. Luckily, my van was finally fixed as well. Only you can decide if you want to re-visit your local GM auto (or non-GM) shop. Good luck on what ever you decide...   .
#6 of 6 Re: Cold engine clicking [chase777] by biker70z Oct 31, 2009 (7:43 am)
Replying to: chase777 (Feb 09, 2008 11:45 am) I have a 5.3 chevy and it calls for 5W-30. I found that running Mobil1 5W-20 will eliminate this problem. Royal Purple and other pure synthetic oills won't help as I have tried. It is very annoying to hear knocking noise coming from expensive engines as you all know. I heard it is caused by an oil pickup tube issue that was a poor design. My thought are GM should have recalled this issue, but thats GM. Anyways, try that oil and please let me know how it worked for you.

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