engine noise on 2005 Chevrolet Suburban 1500

My 2005 Suburban (5.3 Flex Fuel) started making a noise in the engine. I took it to a mechanic and he said it is internal. I put Lucas oil stuff in it to see if would quite it down. It did not. Someone told me it may be a rocker arm? Any ideas I don't want a new motor

by in New Albany, IN on January 20, 2011
1 answer 13 comments
ANSWER by on January 20, 2011
What kind of noise? A light ticking or a hard knocking? Is it comes from the top or the bottom of the engine? Let us know. Zee
COMMENT by on January 20, 2011
It is heavier than a ticking but it its not knocking, it sounds more towards the top. Is it difficult to remove the valve covers?
COMMENT by on January 20, 2011
How many miles are in the truck? Zee
COMMENT by on January 20, 2011
168,000
COMMENT by on January 20, 2011
It's easy to remove the valve covers to inspect the valve train. Each should take about an hour to remove-reinstall. You need to replace the gaskets if you remove the covers. If you need instructions I can send them to you, but you need to post an e-mail. Was it started to make the noise after or soon after an oil and filter change? There is a tech. service bulletin for incorrectly manufactured oil filters: Engine - Noise/Damage Oil Filter Application Importance INFORMATION Bulletin No.: 07-06-01-016B Date: July 27, 2009 Subject: Information on Internal Engine Noise or Damage After Oil Filter Replacement Models: 2010 and Prior Passenger Cars and Trucks (Including Saturn) 2010 and Prior HUMMER H2, H3 2009 and Prior Saab 9-7X Supercede: This bulletin is being updated to add model years. Please discard Corporate Bulletin Number 07-06-01-016A (Section 06 - Engine/Propulsion System). Important Engine damage that is the result of an incorrect or improperly installed engine oil filter is not a warrantable claim. The best way to avoid oil filter quality concerns is to purchase ACDelco(R) oil filters directly from GMSPO. Oil filter misapplication may cause abnormal engine noise or internal damage. Always utilize the most recent parts information to ensure the correct part number filter is installed when replacing oil filters. Do not rely on physical dimensions alone. Counterfeit copies of name brand parts have been discovered in some aftermarket parts systems. Always ensure the parts you install are from a trusted source. Improper oil filter installation may result in catastrophic engine damage. Refer to the appropriate Service Information (SI) installation instructions when replacing any oil filter and pay particular attention to procedures for proper cartridge filter element alignment. If the diagnostics in SI (Engine Mechanical) lead to the oil filter as the cause of the internal engine noise or damage, dealers should submit a field product report. Refer to Corporate Bulletin Number 02-00-89-002I (Information for Dealers on How to Submit a Field Product Report). Zee
COMMENT by on January 20, 2011
I had my first oil change since owning the Suburban 2 months ago and 2,000 miles, could this be the problem, I used a Valvoline Instant oil place.
COMMENT by on January 20, 2011
I don't know what type of oil filter they used, but as you can see GM strongly suggest to use nothing else but the OE ACDelco filter to prevent serious engine damage. I doubt that a quick lube place would have these informations or have access to manufacturer's technical bulletins. Most of the times they don't even use the correct oil. Zee
COMMENT by on January 20, 2011
If it was the incorrect filter is the damage already done or is the new filter just preventing oil to get in the right places?
COMMENT by on January 22, 2011
It's hard to answer to this question without further diagnostic / checks. Lack of oil usually causes permanent damages, if there was some oil, but not the required quantity the problem could be fixed i.e.: not enough oil for the lifters. You can check something, rev up the warm engine couple of times, cut off the engine, pull out the dipstick and see if the oil is aerated on it - if there are many small bubbles in the oil. Zee
COMMENT by on January 23, 2011
What would that tell me?
COMMENT by on January 23, 2011
If the motor oil is aerated there is a leak between the pump and the oil pick-up screen- usually a hardened up O ring - and air enters the system. Since air can be compressed, the hydraulic lifters won't work correctly and that could cause a ticking noise. This problem could be easily repaired by removing the oil pan and reseal the pick-up tube. Zee
COMMENT by on January 23, 2011
Thanks I'll try that. I wont need to remove motor to remove pan will I?
COMMENT by on January 23, 2011
No, but it still takes about 3-4 hours, depends on the transmission (manual-auto) and if 2WD or 4WD. Just check the oil first, if it's not aerated -no tiny bubbles at all - there is no reason to remove the pan, the problem is somewhere else. If you see bubbles I can send you instructions for the pan removal. Zee
COMMENT by on November 01, 2014
Dear sir, I have the very similar problem in my Chevy Suberban 2005 my mechanic says they need a complete overhaul of the engine , may be not know the correct method for pan removal Can you please send me instructions for pan removal to fix the noise problem .Thanks my email:smoin408@gmail.com
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