502 BB Chevy Oil Use - Chevelle Tech
Chevelle Tech join team chevelle as a supporting member  
Chevelle Parts at SS396.com      
GROUND UP & SS396.com         
Official Sponsor of Team Chevelle
     

Auto Insurance

Chevelles.com is the premier Chevrolet Chevelle Forum on the internet. Registered Users do not see the above ads.
Engine AdvertisementGeneral Engine Discussion.

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old Sep 6th, 06, 2:50 AM
rreince rreince is offline
 
Join Date: Sep 2006
Posts: 4
Default 502 BB Chevy Oil Use

I hope I found the right place, hi to all:

I have a question Im sure you all have had tabled before. Currently have a 502 in a 68 GMC. It has always used oil, about 1qt in every 400-500 miles. Is that normal? I did a leak test which turned out fine, my thought was the valve guide seals but was told they are not avaiable for the 502, I dont think a new motor 13000 mi should have such a problem.

Any Ideas, thanks in advance.

Bob
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old Sep 6th, 06, 7:53 AM
PCB67SS PCB67SS is offline
Lifetime Premium Member
Bill
 
Join Date: Feb 2006
Location: PCB Florida
Posts: 3,977
Default Re: 502 BB Chevy Oil Use

Things You Should Know About 502's
A) All 502's built since the inception during the mid 80's have used a unique ring combination of 2.0mm/1.5mm/4.0mm. The factory installed 4.0mm oil ring is a low tension ring. It is used to reduce frictional horsepower losses. Oil consumption is a natural characteristic of this type of oil ring. When it is time for a ''freshen up'' on your 502, we recommend the Speed-Pro High performance file fit ring set which includes a standard tension oil ring for improved ring sealing and oil control. (This info was taken from page 11 Tech. Note in Scoggin Dickey Parts Center catolog)...Hope this helps

Last edited by PCB67SS; Sep 6th, 06 at 8:02 AM. Reason: typo
Reply With Quote Quick reply to this message
  #3  
Old Sep 6th, 06, 8:00 AM
69-CHVL 69-CHVL is online now
Senior Tech Team
Vinny Vince
 
Join Date: Jun 2003
Location: Thornton, Pa
Posts: 12,177
Default Re: 502 BB Chevy Oil Use

Which 502, the ZZ or HO?
__________________
*69 CHEVELLE SS EFI 502/T56/3.90
*06 C6 LS2/T56
*96 Stang LS swap in progress "Che-zang"
Reply With Quote Quick reply to this message
  #4  
Old Sep 7th, 06, 12:45 AM
rreince rreince is offline
 
Join Date: Sep 2006
Posts: 4
Default Re: 502 BB Chevy Oil Use

Quote:
Originally Posted by PCB67SS View Post
Things You Should Know About 502's
A) All 502's built since the inception during the mid 80's have used a unique ring combination of 2.0mm/1.5mm/4.0mm. The factory installed 4.0mm oil ring is a low tension ring. It is used to reduce frictional horsepower losses. Oil consumption is a natural characteristic of this type of oil ring. When it is time for a ''freshen up'' on your 502, we recommend the Speed-Pro High performance file fit ring set which includes a standard tension oil ring for improved ring sealing and oil control. (This info was taken from page 11 Tech. Note in Scoggin Dickey Parts Center catolog)...Hope this helps
Thank you for the information it seems very common from what I gather. When the day arrives and I hope not soon to refresh it I will keep these notes for reference. I might try a 20-50 was another suggestion. Thanks again.
Reply With Quote Quick reply to this message
  #5  
Old Sep 7th, 06, 12:47 AM
rreince rreince is offline
 
Join Date: Sep 2006
Posts: 4
Default Re: 502 BB Chevy Oil Use

Quote:
Originally Posted by 69-CHVL View Post
Which 502, the ZZ or HO?
Its the 502 HO 450HP Cast heads.
Reply With Quote Quick reply to this message
  #6  
Old Sep 7th, 06, 7:19 AM
69-CHVL 69-CHVL is online now
Senior Tech Team
Vinny Vince
 
Join Date: Jun 2003
Location: Thornton, Pa
Posts: 12,177
Default Re: 502 BB Chevy Oil Use

Does it smoke idling?

I think these big block crate motors suffer from 2 problems. The ring situation obviously, and the inadequate valve seals on the iron head motors. I went through this also...still going through it to some degree. My motor smoked bad in addition to using a qt. of oil every 2-300 miles. The factory umbrella seals IMO are too small to drape over the stem adequately, causing a smokey idle and deceleration. Also had puddles of oil on top of each intake valve. I had my heads machined for PC seal. Smoking is gone, but still uses oil. All my plugs come out w/oil on the threads still. I was more concerned about the smoking though as it was quite embarrassing. No seals off the shelf will fit the guides b/c of the dual springs. Getting valves seals will reduce the smoking but not eliminate the oil burn. I was told the low-tension oil rings were worth ALOT of power so that's why GM ran them.

Here's a pic of the factory valve seal (if you want to call it a seal)



Here's a push-on type seal, but the there's not enough clearance between the dual springs to run it. Another member suggested to take the top metal ring off of it and maybe even trim the top a bit. Shoulda tried if B4 ripping the heads off.

__________________
*69 CHEVELLE SS EFI 502/T56/3.90
*06 C6 LS2/T56
*96 Stang LS swap in progress "Che-zang"
Reply With Quote Quick reply to this message
  #7  
Old Sep 7th, 06, 8:12 AM
TW TW is offline
Lifetime Premium Member
Tom
 
Join Date: Sep 1998
Location: MA
Posts: 1,076
Default Re: 502 BB Chevy Oil Use

Bob, I had my 502/502 torque plate honed before I assembled the motor (also had it decked). I reassembled it with the same piston/rings it came with. I used about half a quart in the first 200 miles and have not used any since (~700 miles total). I drive the car hard (it's too much fun stepping into it ). Perhaps the torque plate hone helped the rings to seat bettter?

Vince, I had the same problem when I switched to my Lunati solid roller springs. The stock guide seals would not fit in the spring. I looked through a bunch of sites and found a teflon seal with a smaller OD (I think it was from Crane) that fit with room to spare. You may want to try that route.
__________________
Tom
502 Powered '66 SS
Reply With Quote Quick reply to this message
  #8  
Old Sep 7th, 06, 8:25 AM
69-CHVL 69-CHVL is online now
Senior Tech Team
Vinny Vince
 
Join Date: Jun 2003
Location: Thornton, Pa
Posts: 12,177
Default Re: 502 BB Chevy Oil Use

Tom, you have aluminum heads right? They are machined for the smaller seals from the factory. The iron motor have unmachined guides (.625).

Unless they have a small o.d. push on seal for .625 guides...that would be a godsend.
__________________
*69 CHEVELLE SS EFI 502/T56/3.90
*06 C6 LS2/T56
*96 Stang LS swap in progress "Che-zang"
Reply With Quote Quick reply to this message
  #9  
Old Sep 7th, 06, 10:33 AM
pdq67 pdq67 is offline
Guest
Paul
 
Join Date: Jan 2001
Location: Columbia, MO, USA
Posts: 14,685
Default Re: 502 BB Chevy Oil Use

It's as if these big motors make all that much power stock to begin with that they need "ring-lites" in them!!

These two things here are just more of the General's not better ideas to me!!

Sorry for your hassle.........

pdq67
Reply With Quote Quick reply to this message
  #10  
Old Sep 7th, 06, 1:07 PM
TW TW is offline
Lifetime Premium Member
Tom
 
Join Date: Sep 1998
Location: MA
Posts: 1,076
Default Re: 502 BB Chevy Oil Use

Yeah Vince, that's a good point. I think my guides use the 0.530" seals. You would obviously need to turn down the guides to make them work. I think the ones I have are the larger ones.
__________________
Tom
502 Powered '66 SS
Reply With Quote Quick reply to this message
  #11  
Old Sep 17th, 06, 3:01 AM
rreince rreince is offline
 
Join Date: Sep 2006
Posts: 4
Default Re: 502 BB Chevy Oil Use

I'm not sure this will get to evryone who has had a hand on my question, but just wanted to say thank you, what a great group.

With the information you ALL have offered I have decided its "normal" for this power plant, when it's time to refresh I have some good information.

Thanks agian

Bob
Reply With Quote Quick reply to this message
  #12  
Old Sep 25th, 07, 10:03 PM
1st timer 1st timer is offline
Lifetime Premium Member
Grant
 
Join Date: Sep 2006
Location: Kirkland, WA
Posts: 121
Default Re: 502 BB Chevy Oil Use

do the new ZZ's with alumninum heads have the same problems as the HO's? I really want to put a ZZ in my 67, but no way am I going to pay the big bucks for an engine that burns oil.....very shameful! guess I will have to go with another engine choice....anybody hear anything about the new Edelbrock 502?

thanks
Reply With Quote Quick reply to this message
  #13  
Old Sep 25th, 07, 10:19 PM
Bryan59EC Bryan59EC is offline
Senior Tech Team
Bryan
 
Join Date: Apr 2007
Location: San Antonio, Texas
Posts: 4,340
Default Re: 502 BB Chevy Oil Use

my 454 HO (build date=07-04) had the rings in upside down

Light hone--machine heads for new valve seals--new rings
(had this done by a builder)

Engine has not been back in the car long enough for me to get a grip on it yet.

Tailpipes were litterally dripping with oil
Even had an oil spot on the garage floor under the mufflers while the car was sitting w/o motor.
Also---the valley baffle is designed so that the 'tabs' that support it, rest on a intake/head mating surface.
I trimmed the tabs in the center off-----double the vacuum.
Chimps are building these motors
__________________
Bryan's toyz

59 ElCamino 454/TKO 5spd--(daddy)
66 ElCamino 3oh7/TKO 5spd (mousey) Almost done On the street now!!!
65 Ranchero v8/4-spd, that my uncle bought new
Reply With Quote Quick reply to this message
  #14  
Old Sep 26th, 07, 7:34 AM
pdq67 pdq67 is offline
Guest
Paul
 
Join Date: Jan 2001
Location: Columbia, MO, USA
Posts: 14,685
Default Re: 502 BB Chevy Oil Use

This is why I will build my next BB myself!!

Whether it be a 468" or a 588"!!

F-- GM!!

pdq67
Reply With Quote Quick reply to this message
  #15  
Old Sep 26th, 07, 8:56 AM
Finally Finally is offline
Lifetime Premium Member
Hank
 
Join Date: Jul 2004
Location: Brighton, MI
Posts: 6,731
Default Re: 502 BB Chevy Oil Use

I know some will say garbage but here's what I've seen with my 454HO. After initial breakin it blew smoke on startup like crazy. Was only running on 6 or 7 cylinders and would take 5 minutes to burn up all the oil in the cylinders and start running on all 8. This was consistent, every startup.

I swapped the valve covers that come with the engine for the short chrome covers from my 396, no more smoke and starts on all 8. Also moved PCV valve hookup from intake to carb. Oil consumption is way down as well. Still less than 1000 miles on engine, maybe the rings have seated more. All I know is the change was dramatic. Wouldn't cost much to test this yourself. Remove PCV valve and replace with breather.
__________________
Hank

70 Chevelle SS396(454), M20, 3.73
My Chevelle
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply
Chevelle Tech > Mechanical > Engine      Current Topic: 502 BB Chevy Oil Use
Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may post new threads
You may 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Chasing Oil Leak dmg1029 Chevelle Tech 6 May 30th, 06 8:03 AM
BB Chevy Help, oil pressure mac762 Engine 13 Apr 7th, 06 6:41 PM
Help!!! Will these holes in the oil gallery plugs hurt oil to the lifters? Whittaker Performance 5 Feb 4th, 06 7:03 AM
So how does an oil gauge work? 67 vette guy Chevelle Tech 9 Aug 2nd, 05 3:48 PM
Fuel in Oil - Low Oil Pressure? Brad Engine 6 Apr 19th, 05 8:39 AM


All times are GMT -4. The time now is 9:00 PM.


Is there a site like this for?    El Caminos Camaros Novas Impalas GTO Chevy Punch All Chevys

2009 Team Chevelle - AutoForums