6.5L vs 6.2L - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
Home Forum Market Place Garage Lounge (2) Tuning Library DTC Tool Register Vendors
Go Back   Diesel Place : Chevrolet and GMC Diesel Truck Forums > GM Diesel Engines > 6.5L Diesel Engine
Register FAQ Forum Rules My Replies My Threads Mark Forums Read Auto EscrowAuto LoansInsurance

DieselPlace.com is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools
Old 01-16-2011, 05:19 PM   #1 (permalink)
pantis
Diesel Enthusiast
 
Join Date: Dec 2010
Posts: 4
iTrader Score: 0 reviews

6.5L vs 6.2L

Hey guys. I know this has been talked about a lot but through my searches I cant really find a straight answer. Basically which engine is better? The reason I ask is because Im planning on buying a truck soon and want something that I wont have to worry about fixing too much. I wont be doing a ton of hauling mostly daily driving and towing a car across a few states twice a year. I also want to use vegetable oil on my truck. So which one is better? And please state why. If you pick the 6.5l would you rather have one with a mechanical injection pump or the pmd version? Thanks for all your advise guys.
Offline  
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 01-16-2011, 05:22 PM   #2 (permalink)
pantis
Diesel Enthusiast
 
Join Date: Dec 2010
Posts: 4
iTrader Score: 0 reviews

Also im looking at a 94 chevy that has a 6.2l turbo that he says he got from repo. Did someone swap the engine out or do some 94's come this way? Also I heard that the turbo on the 6.2l can cause trouble?
Offline   Reply With Quote Quick reply to this message
Old 01-16-2011, 05:51 PM   #3 (permalink)
Jess_sr
Diesel Specialist
 
Jess_sr's Avatar
 
Join Date: May 2007
Location: Jersey Shore
Posts: 673
iTrader Score: 0 reviews
Send a message via ICQ to Jess_sr

I believe 92 and back was a 6.2
The turbo started in 93 with mechanical injection.
94 and up has the PMD electronic injection system.

I personally don't want the extra hassle of a PMD.
There not dependable IMO
__________________
93 Chev 2500 4x4 HD Ext Cab Fltsde Pickup
6.5 turbo F mechanical injection
4L80E 410 locker rear
Gibson 3" Exhaust, 2 1/2 crossover
LT275/70R16 D BFG A/T KO
16x8 wheels
Offline   Reply With Quote Quick reply to this message
Old 01-16-2011, 05:58 PM   #4 (permalink)
mgray1982
Diesel Specialist
 
Join Date: Oct 2007
Location: Vancouver, BC
Posts: 632
iTrader Score: 0 reviews

The previous owner of my truck made his own bio, and I'm still running the same electric DB4 pump 3 years later with no known issues.

I've heard, and would lean towards the mechanical DB2 for WVO though.
__________________
1996 Chevrolet Silverado 2500 4X4 6.5F 250,000km/155,000miles
Heath FSD and lift pump
Torsion Bars turned up 2"
Offline   Reply With Quote Quick reply to this message
Old 01-16-2011, 06:11 PM   #5 (permalink)
TBWdracula2003
Diesel Technician
 
Join Date: Jul 2010
Location: Baker mt
Posts: 227
iTrader Score: 0 reviews

Old School Oil Burners (Old SOBs) Member

6.5 = win lol the 6.2 if you put to much stress on the engine they have a tendency to snap the crank, but there is a trade off. the 6.2 had a stronger block and tended to last longer ( mileage wise ) i know of many 6.2's with over 700K on them and more than one 6.5 that has worn out at under 200K. but then again it all comes down to how you treat it. how long you let it warm up for before you take off, plugged in or not, how heavy you're foot is it all comes down to a few simple issues like that.



Quote:
Originally Posted by mgray1982 View Post
The previous owner of my truck made his own bio, and I'm still running the same electric DB4 pump 3 years later with no known issues.

I've heard, and would lean towards the mechanical DB2 for WVO though.
DB4? do you mean the DS4?

Last edited by TBWdracula2003; 01-16-2011 at 06:12 PM.
Offline   Reply With Quote Quick reply to this message
Old 01-16-2011, 06:23 PM   #6 (permalink)
4320Diesel
Resident Pinhead
 
4320Diesel's Avatar
 
Join Date: Mar 2009
Location: Grenfell, Saskatchewan
Posts: 6,330
iTrader Score: 0 reviews

Old School Oil Burners (Old SOBs) Member

ok guys, lets straighten stuff up here. no 6.2's come with turbos from factory. they could have a dealer installed banks kit in 89+? but thats it. in 92 is when the 6.5 turbo come out in 3/4 ton+ trucks and the 6.2 was then limited to only halfton use i think(someone correct me on that last part if im wrong). in 1994 they ditched the 6.2 totally and then put the DS4 on the 6.5 and gave the option of no turbo on the 6.5. now, 6.2's and 6.5's have basicly the same crank(different in 660 block 6.2's because of the 2 piece rear main seal). 6.2's have different injector angles in the heads so a GM-X turbo manifold wont fit without either a spacer or the short injectors that later 6.2's had and all 6.5's had. really, id say they're about the same engine. the 6.5 is more suited for turbocharging( has anodized pistons, and stronger headgaskets and a larger injection system). 6.2's have different precups that are better suited for fuel economy. the 6.5's precups are more suited for power. if it was me, id be going with the tried and true 6.2 just because people dont overprice the hell out of them. as soon as you see the number 6.5 on a truck its automaticly 4+ grand. you can get a 6.2 and turbo it( wont make quite as much power as a 6.5 but awfully close) for well under that price and it will last just as long as you keep the EGT's and boost in check and dont drive like a retread. hope this clears things up for everyone.
__________________
1985 GMC (The Brown Streak) Sierra Classic 1500 4WD With 6.2L V8 Diesel and 4speed NP833 trans with hurst shifter! , 4911 6.5 ip with 6.5 shortie injectors GM-3 turbo. Single plane J code intake from Turbonator (thanks guys!). 3" exhaust and 3" BBQ black stacks! Isspro Pyrometer, Trisco Boost and Engine Oil Temp Gauges.
1995 Dodge 2500 Cummins 12 valve NV4500 4x4 LB club cab autometer boost and pyro BrentBilt fuel plate full forward silencer ring MIA straight pipe AFC totally maxed out
1977 GMC high sierra 6500 2WD with 366V8 and 5+2 speed trans
1968 Mercury (The Tank) M-100 2WD with 300 I-6 and 3 on the tree trans
1971 John Deere 4320 with a 404CID With A Factory Shwitzer 3LD turbocharger Crankin 116 horsepower with over 9700 origininal hours on the engine never rebuilt!
1978 John Deere 8630 with a reman 619 CID Diesel out of a 8650 With A Factory Aireasearch TV-6102 turbocharger Crankin 320 Horsepower and 1700 torque
Quote:
Originally Posted by diaric View Post
your wrong brent, i'll think of a reason later

Quote:
Originally Posted by diaric View Post
brent can't do that, it would look factory, lol

Quote:
Originally Posted by Trios View Post
Brent is right.
Was there any ever doubt?
Offline   Reply With Quote Quick reply to this message
Old 01-16-2011, 08:18 PM   #7 (permalink)
smackzed
Mad (Sean) Max
 
smackzed's Avatar
 
Join Date: Jan 2009
Posts: 6,687
iTrader Score: 1 reviews

Old School Oil Burners (Old SOBs) Member

DieselPlace.com Premium Member Member

As 4320 said for the 92 and 93 years same crank and same block. Asking which engine is better is kinda like asking are bannans better than carrots. Each has their good points and their weak points. 6.2's don't take turbo quite as well as the 6.5 but also don't have the PMD issue. The best of both worlds is the 93 6.5. 599 block and comes with turbo already installed. When I do see them for sale tho they are usually about the same price as a '97 or newer.
__________________
'87 GMC R2500 380,000km
AM/FM Radio -rebar except for engine trans and misc suspension parts

'90 GMC R3500 srw 3+3 280 000kms
CD player that eats CDs
No matter what Dieselplace may say, I am not a diesel technician, nor expert or specialist. Just a cheap guy with old truck that needs to run
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Diesel Place : Chevrolet and GMC Diesel Truck Forums 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 for yourself.
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

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
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 01:55 AM.


Shoutbox provided by vBShout v6.2.1 (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
© AutoGuide

SEO by vBSEO 3.6.0