post #1 of Old 07-10-2012, 10:41 AM Thread Starter
mrny
Registered User
 
Join Date: Jul 2012
Location: Kalamazoo
Posts: 4
Lifters Noisy

When my 05 Liberty 3.7 is shut down and I restart when it is still warm, the lifters sometimes are momentarily noisy. I wonder if I can switch from 5w30 to 10w30 for a trial . My manual says 5w30 I don't think it would hurt anything .

mrny is offline  
post #2 of Old 07-10-2012, 06:49 PM
streetglideok
Registered User
2005 KJ Liberty 
 
Join Date: Jul 2011
Location: Castle Pines
Posts: 3,034
Quote:
Originally Posted by mrny View Post
When my 05 Liberty 3.7 is shut down and I restart when it is still warm, the lifters sometimes are momentarily noisy. I wonder if I can switch from 5w30 to 10w30 for a trial . My manual says 5w30 I don't think it would hurt anything .
Umm yeah, it can actually. Your oil pump is designed to pump oil of a certain viscocity. Too thick, and you can cause damage to the pump, and the relief valve. 10w30 will be thicker cold, and about the same viscocity warm as 5w30, so with a warm engine, you gain nothing, and with cold starts, you will aggravate your problem, with an engine starving longer on start up. Valvetrain clatter is not a sign of needing thicker oil, its usually a sign of lack of proper oil change intervals, and sludge deposits building up. One more thing, 10w30 has a different additive spec, and the needs of your engine will surpass what that oil can deliver.
streetglideok is offline  
post #3 of Old 07-11-2012, 08:05 PM
tjkj2002
Registered User
2002 KJ Liberty 
 
Join Date: Dec 2009
Location: Colorado
Posts: 8,360
You can use either 5w-30 or 10w-30 in the 3.7,just don't use 10w-30 below 32 degrees is all.

I run 10w-30 synthetic on road trips if not in the winter time,5w-30 synthetic the rest of the time and my engine has a loud tick that has been there since mile 3 on the ODO.With 5w-30 syn on a cold start up at 70 degrees outside temp I start with almost 90psi of oil pressure,over 100psi with 10w-30 syn.

'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
tjkj2002 is offline  
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
noisy fan skykris KJ Liberty Forum 3 10-03-2014 07:13 PM
It was just the lifters! mt7558 KJ Liberty Forum 1 05-14-2012 08:59 AM
Noisy alternator? 02blue KJ Liberty Forum 2 01-16-2012 06:30 AM
Noisy suspension??? joelfred31 KJ Liberty Forum 5 12-17-2008 07:18 PM
How to oil noisy door? dac122 KJ Liberty Forum 1 04-02-2007 04:07 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome