3800 V6 Leaking oil - Page 4 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Oldsmobile When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Reply
 
 
 
Thread Tools Search this Thread
Old 10-25-2012, 01:45 PM   #31
Senior Member
Posts like a 4 Banger
Thread Starter
 
Martinnhs12's Avatar
 
Join Date: May 2011
Location: Tucson, Arizona
Posts: 124
Thanked 2 Times in 2 Posts
Martinnhs12 is on a distinguished road
Default

Quote:
Originally Posted by 2kg4u View Post
Piston slap is not the piston hitting the cylinder heads. It is when there is too much clearance between the piston and cylinder walls and the pistons rattles (or slaps) against the walls as it moves up and down.

A piston physically contacting the head on the top of its stroke can only happen if there is a chunk of something sitting on top of the piston, there is a grossly excessive build up of carbon, or you are using the wrong spark plug and it is too long.
Well, the spark plugs are the right size. I think it'* just the piston that'* too small for the cylinder. I'm just waiting until Ol' Roy "goes" to start rebuilding. By the way Ol' Roy is my car'* name.
Martinnhs12 is offline   Reply With Quote
Old 10-25-2012, 01:54 PM   #32
Senior Member
Posts like a 4 Banger
Thread Starter
 
Martinnhs12's Avatar
 
Join Date: May 2011
Location: Tucson, Arizona
Posts: 124
Thanked 2 Times in 2 Posts
Martinnhs12 is on a distinguished road
Default

Quote:
Originally Posted by 2kg4u View Post
If it is piston slap, one band-aid fix (well, more of an improvement than a fix) is to run a heavier grade of oil. If you are running W30, go to W40. If you are running W40, go to W50. This should reduce the slap.
I have added thicker oil before, but it kills my gas mileage, and how you mentioned going to 50 grade oil, i think it only makes worse since you force the engine to push the heavier oil.
Martinnhs12 is offline   Reply With Quote
Old 10-25-2012, 02:05 PM   #33
Senior Member

True Car Nut
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,804
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Higher viscosity oil will reduce piston slap in most cases, but it certainly is not a fix.
2kg4u is offline   Reply With Quote
Old 10-25-2012, 05:43 PM   #34
Senior Member
Posts like a 4 Banger
Thread Starter
 
Martinnhs12's Avatar
 
Join Date: May 2011
Location: Tucson, Arizona
Posts: 124
Thanked 2 Times in 2 Posts
Martinnhs12 is on a distinguished road
Default

Definitely
Martinnhs12 is offline   Reply With Quote
Old 11-25-2012, 07:31 AM   #35
Junior Member
 
Join Date: Jan 2012
Location: Fort Stewart GA
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
cw2lido is on a distinguished road
Default

Not sure the age of this thread but here are some thoughts.

1. That gasket you used on your oil pan is great if you are going to do a quick sale on your car or you can use little bit of gasket maker to keep it in place while you put it up on the car. Fel-Pro makes another gasket that is double the price of that one but well worth every penny! Not saying you did this but you may have torqued down the bolts too much and not in the correct order. Just a thought.

2. Orange fram filters. Blah...if you love your motor and it sounds like you do, you would give it something else to help filter the oil.

3. Did you go synthetic and then notice this "piston slap/knocking'? You may want to go back to conventional and see what it does for you.

Since the mechanic you take it too has so much knowledge on this motor and he told you they drove it without oil 4 times than I would drive it like you stole it, or as my freind would say till the wheels fall off. 3800'* can go a long time if they are taken care of.

You could also have a front seal leaking where the harmonic balancer is, sometimes hard to see. Start your car, run it, and then watch for the oil to start leaking.

Just a few thoughts.

Have you changed your Lower Intake Manifolds. Once those fail on you and some coolant gets in the oil that will cause the bearings to go back and result in rod knock/piston slap. That happend to my 97 3800 in my Junkmaro.
cw2lido is offline   Reply With Quote
Old 11-25-2012, 07:32 AM   #36
Junior Member
 
Join Date: Jan 2012
Location: Fort Stewart GA
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
cw2lido is on a distinguished road
Default

Sorry I meant to say your lower intake manifold gaskets...they have a second design that are spendy but again, if you love your motor...
cw2lido is offline   Reply With Quote
Old 01-09-2013, 11:54 PM   #37
Junior Member
 
Join Date: Jan 2013
Location: california
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
califcarson is on a distinguished road
Default persistant oil leaks

I have owned three Pontiac'*, and three Buick'*. I always have had oil leaks. I still have one Buick that always leaked oil since new, and a Pontiac that leaks oil after three years. While under warranty and extended warranty the dealer never could find the leaks, and told me I had no leaks. I had them check almost five times on each car over the years. I have a huge oil spot under my Buick and replace 1 1/2 quarts of oil in my Pontiac every 1000 miles. Not until I exhausted all my warranties on both did the dealership finally tell me they found the oil leak. Since there seems to be a common leakage problem, is there any recall or something that will stop the darn leaks?
califcarson is offline   Reply With Quote
Old 01-10-2013, 01:35 AM   #38
Senior Member
Posts like a Supercharger
 
djlarson0506's Avatar
 
Join Date: Jan 2013
Location: Enfield, CT
Posts: 194
Thanks: 0
Thanked 0 Times in 0 Posts
djlarson0506 is on a distinguished road
Default

Have you figured out the cause for the knock/slap? I'd be interested to know.
djlarson0506 is offline   Reply With Quote
Old 01-10-2013, 04:15 AM   #39
Junior Member
 
Join Date: Jan 2013
Location: california
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
califcarson is on a distinguished road
Default

I guess I'm a GM person with a Buick, Pontiac, and Corvette. All leak oil. My MBZ does not.
califcarson is offline   Reply With Quote
Old 01-10-2013, 04:16 AM   #40
Junior Member
 
Join Date: Jan 2013
Location: california
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
califcarson is on a distinguished road
Default

Quote:
Originally Posted by califcarson View Post
I have owned three Pontiac'*, and three Buick'*. I always have had oil leaks. I still have one Buick that always leaked oil since new, and a Pontiac that leaks oil after three years. While under warranty and extended warranty the dealer never could find the leaks, and told me I had no leaks. I had them check almost five times on each car over the years. I have a huge oil spot under my Buick and replace 1 1/2 quarts of oil in my Pontiac every 1000 miles. Not until I exhausted all my warranties on both did the dealership finally tell me they found the oil leak. Since there seems to be a common leakage problem, is there any recall or something that will stop the darn leaks?
I guess I'm a GM person with a Buick, Pontiac, and Corvette. All leak oil. My MBZ does not. https://www.gmforum.com/gm/images/sm...lipa.gif:pb:pb
califcarson is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Low oil light/low oil pressure 3800 Impala 2k2cse Chevrolet 14 05-16-2013 05:38 AM
Oil leaking after oil change rkpatt 1992-1999 5 12-20-2009 02:08 PM
Leaking Supercharger Oil Jonathan93 Forced Induction 8 08-26-2006 12:16 AM
Leaking S/C oil petraman Forced Induction 3 08-24-2006 10:43 PM
oil plug leaking egladman 1987-1991 2 11-14-2003 08:33 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Refbacks are Off



All times are GMT -4. The time now is 12:57 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.