Go Back   LS1TECH > LS1-LS2-LS3-LS6-LS7 PERFORMANCE > Generation III Internal Engine
Sign in using an external account
Register Forgot Password?
Search

Generation III Internal Engine
1997-2006 LS1 | LS6
Sponsored by
Texas Speed & Performance

Welcome to LS1Tech.com!
Welcome to LS1Tech.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join LS1Tech.com today!


Reply
 
Thread Tools Search this Thread
Old 12-19-2008, 07:06 PM   #1
TECH Regular
Garage is empty, add now
 
Trader Rating: 4
Join Date: Sep 2007
Posts: 410
Default 4.8 or 5.3? How to tell?

I just picked up what I believed was a 5.3 for a swap im doing, but I notice on the block it say 4.8L/5.3L. It has 862 heads and that's all I know so far, how can I tell if I indeed have a 5.3 or I need to bash someones head in for selling me the wrong motor?
__________________
'78 Jeep CJ-7 °IIIII°
1999 Camaro - 6 liters of fury....
sman is offline   Reply With Quote
Old 12-19-2008, 07:24 PM   #2
Launching!
Garage is empty, add now
 
68 RS Convertible's Avatar
 
Trader Rating: 1
Join Date: Aug 2008
Location: RI
Posts: 259
Default

Unless you know the vehicle the motor came out of and can verify it that way the only other way i know of is to tear it down. I believe all the internals are the same (crank and rod length), but the 5.3 is a larger bore, but if I'm wrong someone please correct me. I'm not familiar with, to put it better I have no clue as to head casting differences between the 4.8 and 5.3. So before you go head bashing try and verify the vehicle it came out of, maybe there is some paperwork with the donor vehicle to verify its a 5.3. Good Luck.
68 RS Convertible is offline   Reply With Quote
Old 12-20-2008, 01:04 AM   #3
Teching In
Garage is empty, add now
 
Trader Rating: 0
Join Date: Dec 2008
Location: Grand Rapids, MI
Posts: 25
Send a message via AIM to djwimbo
Default

Pretty much what he said, if you knew what it came out of you would have a clue to what it is.
Both engines are identical aesthetically. The 4.8 has the shorter stroke though, bore should be the same(96.01mm/3.780"). The 5.3L should have the 3.622" stroke.

Example, Std Cab trucks came in 4.8L and Ext Cab had the 5.3. The trucks with a towing pkg should have the 5.3 as well.
djwimbo is offline   Reply With Quote
Old 12-20-2008, 10:15 AM   #4
10 Second Club
Garage is empty, add now
 
5.3LJimmy's Avatar
 
Trader Rating: 10
Join Date: Jun 2004
Location: Belle Rose, LA
Posts: 2,259
Default

You can pull the spark plugs and try to look at the pistons, or pull the heads if you plan on taking them off anyway. The 4.8 has flat tops and the 5.3 has a dished piston. You can also pull the oil pan and see what crank it has. 4.8 has 3.28 stroke and the 5.3 is 3.622.
__________________

Fquick
5.3LJimmy is offline   Reply With Quote
Old 12-20-2008, 04:40 PM   #5
Launching!
Garage is empty, add now
 
blackLS1m6's Avatar
 
Trader Rating: 9
Join Date: Jul 2008
Location: Villa Park, Illinois
Posts: 289
Default

Don't the 4.8s have a different rod length?
__________________
2002 Z28 M6 LS2 (12.1 solid roller set up soon) Sbe LS1 AFR 225 Tr6060 S60 4.30 Chrs1313 Ram air Weight reduction
2001 Camaro SS M6 Black on Black factory block heater stock LS2
2000 WS6 Transam LS3 Tick Stage 2 cam, .617".589" 231/240 112LSA Vigilante 3600 stock 10 bolt 3.23 194k ARH 1 7/8" ORY 3.5" cutout kooks bullet muffler into the stock catback Whisper lid Chrs1313 A/C ram air Speed Inc UDP, 11.40@118.5 1.58 60 ft on worn 17" MT Drag Radials going for 10s while looking stock
blackLS1m6 is offline   Reply With Quote
Old 12-20-2008, 04:56 PM   #6
TECH Senior Member
2000 Chevrolet Camaro
My Garage
 
NemeSS's Avatar
 
Trader Rating: 123
Join Date: Sep 2005
Location: Houston,TX
Posts: 6,622
Default

Quote:
Originally Posted by blackLS1m6 View Post
Don't the 4.8s have a different rod length?
correct.
4.8 has longer rods and flattop piston
usually the motor will have a paint mark next to the designated displacement.
on 5.3/4.8
__________________
NemeSS is offline   Reply With Quote
Old 12-21-2008, 09:11 AM   #7
10 Second Daily Driver
Garage is empty, add now
 
jlrz28's Avatar
 
Trader Rating: 5
Join Date: Nov 2002
Location: Pearland, Tx
Posts: 1,870
Default

Quote:
Originally Posted by djwimbo View Post

Example, Std Cab trucks came in 4.8L and Ext Cab had the 5.3. The trucks with a towing pkg should have the 5.3 as well.

Not exaclty, some Ext cab trucks have the 4.8.
__________________
2000 Z28 A4, 531Hp 487Tq
10.52@127.37mph
LME LS2 402, TFS215, Pat G 242/246, Fast 102, NW102, 4L60E w/ Circle D 3E and Moser 9"

LME
G-Force
Pat G Custom Cams/Tuning
jlrz28 is offline   Reply With Quote
Old 12-21-2008, 09:20 AM   #8
TECH Fanatic
Garage is empty, add now
 
regency's Avatar
 
Trader Rating: 15
Join Date: Nov 2005
Location: Alexandria, LA
Posts: 1,879
Default

only way to really tell is to look at the top of the pistons.

4.8 = 3.27 stroke, 6.278 rod length, and 3.779 flat top piston
5.3 = 3.622 stroke, 6.098 rod length, and 3.779 dished piston
__________________

2005 Silverado 5.7 LS1
N/A 1.67 - 60' / 11.92 @ 113 - 1/4, Best 60' on motor 1.57
11.36 @ 117 on 100 shot
regency is offline   Reply With Quote
Old 12-21-2008, 12:47 PM   #9
11 Second Club
Garage is empty, add now
 
5_02ls1's Avatar
 
Trader Rating: 20
Join Date: Oct 2006
Location: Virginia
Posts: 3,132
Default

I have 2 5.3s sitting here and both of them have a big mark next to the 5.3...


4.8
/
5.3/
it should lookl somthing like that on the drivers front of block
__________________
98 Artic White trans am
mild H/C
TH350 3600 stall
alot of weight reduction
373s
5_02ls1 is offline   Reply With Quote
Old 12-21-2008, 01:08 PM   #10
Teching In
Garage is empty, add now
 
Trader Rating: 0
Join Date: Dec 2008
Location: Canton, MI
Posts: 6
Send a message via AIM to 347Convert
Default

I have a 5.3 and it has a plat piston? Hmmmm

What block are we talking because mine is aluminum. I belive it is the newer 330hp option package engine.
347Convert is offline   Reply With Quote
Old 12-21-2008, 03:29 PM   #11
Teching In
Garage is empty, add now
 
Trader Rating: 0
Join Date: Dec 2008
Location: Grand Rapids, MI
Posts: 25
Send a message via AIM to djwimbo
Default

Quote:
Originally Posted by 347Convert View Post
I have a 5.3 and it has a plat piston? Hmmmm

What block are we talking because mine is aluminum. I belive it is the newer 330hp option package engine.
Alum block is the L33, it's the newer HO version. I did some research on that one not too long ago, basically, you have a small displacement LS6.
djwimbo is offline   Reply With Quote
Old 12-21-2008, 03:29 PM   #12
TECH Resident
Garage is empty, add now
 
red83's Avatar
 
Trader Rating: 64
Join Date: Jul 2005
Location: sneaking in your back door as you leave!/cartersville ga
Posts: 909
Default

all the motors i have seen have always had a mark beside either 4.8 or the 5.3
__________________

THE GREAT ONE
Too many toys!!!
red83 is offline   Reply With Quote
Old 12-22-2008, 12:16 PM   #13
TECH Regular
Garage is empty, add now
 
Trader Rating: 4
Join Date: Sep 2007
Posts: 410
Default

Guess I never thought about that. Now that I think about it I remember there being a yellow mark in that area on the block. Crap now I just cant remember where it was. Im at work, it will have to wait till I get home. The suspense is killing me.
__________________
'78 Jeep CJ-7 °IIIII°
1999 Camaro - 6 liters of fury....
sman is offline   Reply With Quote
Old 12-23-2008, 09:53 PM   #14
TECH Regular
Garage is empty, add now
 
Trader Rating: 4
Join Date: Sep 2007
Posts: 410
Default

Well in case anyone was wondering it is indeed a 5.3. Verified by the bore and the yellow paint parking over the 5.3 on the block. But man, its not dished very much, I expected more. Not complaining or anything just expected it to be more "dished" when I pulled the heads.
__________________
'78 Jeep CJ-7 °IIIII°
1999 Camaro - 6 liters of fury....
sman is offline   Reply With Quote
Old 12-23-2008, 09:53 PM
LS1Tech
Pontiac Firebird




Paid Advertisement
Reply

Tags
2005, 48, 48l, 53, 53l, 862, conversion, difference, differents, engine, flat, heads, length, pistons, rod, tell, top, vortec


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 On
Refbacks are Off



All times are GMT -5. The time now is 07:24 AM.


Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Service - Privacy Statement - JOBS
Emails & Contact Details