Question: 1st Time Diesel Owner Questions - Page 4 - Diesel Place : Chevrolet and GMC Diesel Truck Forums
Home Forum Market Place Garage Lounge (5) Tuning Library DTC Tool Register Vendors
Go Back   Diesel Place : Chevrolet and GMC Diesel Truck Forums > GM Diesel Engines > 6.2L Diesel Engine
Register FAQ Forum Rules My Replies My Threads Mark Forums Read Auto EscrowAuto LoansInsurance

6.2L Diesel Engine Discuss the 6.2 GM diesel engine & associated components. is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
LinkBack Thread Tools
Old 01-23-2013, 06:29 PM   #31 (permalink)
Diesel Enthusiast
oldblue92's Avatar
Join Date: Jan 2013
Posts: 16
iTrader Score: 0 reviews

Ok so I took off early from work to look over the new truck and Dear Lord I found a squirrels nest in the aircleaner assembly. Truck was starving for air. Took it down the street drives alot better now

1)I've been looking for an engine diagram on this site but cant find one. Just something with basic parts identification.

Being this my first diesel i have know idea what some of this stuff is

2)What motor oil should I run with this high of miles

3)What type of trans fluid? 5-speed

4)Is that water separator filter the fuel filter?

5)Engine is warming up but gauge barley moves and no heat in the cab. Low on coolant so i added a bunch, res was crusty brown and icy also saw icey brown flouty's in the radiator . Ran the truck for about 30mins. down the road and back. No luck on the heat in the cab or gauge. Wonder if the heater core is frozen? 10DEG F. out side.

The guy who owned this truck must of been an idiot . Slushy radiator squirrels nest in the air cleaner. Hope the block is alright
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Old 01-23-2013, 08:56 PM   #32 (permalink)
Diesel Master
roadhog0's Avatar
Join Date: Dec 2011
Location: Washington
Posts: 1,957
iTrader Score: 1 reviews

Old School Oil Burners (Old SOBs) Member

1. There is a military manual under the FAQ
2. 10w40, works ok, little thick cold. I run 80 PSI cold idle on my fresh motor. 75 cruising warm. I use Delo400
3. Cant help ya there
4. Yup. You can ditch the box and do a spin on setup, doesnt leak as much!
5. Frozen heater core or stuck open thermostats. My truck with dual stats had brand new NAPA ones stick open in under 6 months and less than 1000 miles... Get some antifreeze in that baby!
1986 Chevy K20 6.2TD NV4500!! 4.10's (Name: POS Truck)
6.2 Turbo Diesel (HX40 CKO), 6.5 Serp, 6.5 Lift Pump, intercooler (to come), more broken or missing parts than you can shake a fist at, balls.
Online   Reply With Quote Quick reply to this message
Old 01-23-2013, 09:22 PM   #33 (permalink)
Diesel Technician
Formerly zland76
Landmine's Avatar
Join Date: Jul 2010
Location: Massatooshits
Posts: 896
iTrader Score: 0 reviews

Old School Oil Burners (Old SOBs) Member

Flush your radiator and heater core, drain it, fill with water and soap. repeat.
1 4 wheeled scrap pile
Offline   Reply With Quote Quick reply to this message
Old 01-23-2013, 10:53 PM   #34 (permalink)
Diesel Technician
Fmiser's Avatar
Join Date: Dec 2012
Posts: 107
iTrader Score: 0 reviews

Old School Oil Burners (Old SOBs) Member

Soap should only be needed if there is any evidence of oil. And use a low-suds soap - like dishwasher detergent.

Use acid to get the rust and/or calcium out. Citric acid works well. It's often available as a food canning supply.

Oil topics are almost as bad as politics! I'm not fond of Rotella. Their marketing seems better than their engineering. Dello 400 and Delvac 1300 are two top oils, especially in the heavy truck market. Synthetics are good, especially for cold weather because they are not as thick at sub-zero C. Mobil 1 and Amsoil are "true" group IV synthetics. The others that claim synthetic are group III and can only be sold as "synthetic" in the USA. While a group III is better than "dino" oil, it is not as good as group IV, but should cost less. I believe Castrol and Valvoline have some oils that are labeled as "made in germany" and are group IV.

Regarding the engine temp. Per chance, do you have a IR (no contact) thermometer? It's a handy tool for this sort of stuff. You can check the temp of the thermostat housing, the top of the radiator, the bottom of the radiator, the hoses, etc and knowing where it's hot and where it's not is helpful. But if I were to guess I'd say the thermostat is missing or not working right.

Can't help with the transmission oil. But synthetic is nice there too.

The fuel filter is also the water seperator. My experience is limited to my '85. It's a silver rectangle and it's leaking so I'm hunting alternatives.
A Diesel 6.2L, 1985 2500 GMC Suburban
A few diesel W123 Mercedes
Gasoline lawnmowers and chainsaws
Offline   Reply With Quote Quick reply to this message
Old 01-23-2013, 11:27 PM   #35 (permalink)
Diesel Master
JLanzino's Avatar
Join Date: Mar 2009
Location: Ontario Canada
Posts: 1,050
iTrader Score: 0 reviews

Ontario Diesel Place Chapter Member

Old School Oil Burners (Old SOBs) Member

Originally Posted by oldblue92 View Post
Its a 3500 dually. vin came back with 4:10 gears. What do I need to know about swaping a th400. The 5-speed is horrible.
The TH400 is a bullet prof transmission, but I would put a 700R4 behind it, if your going to be daily driving more than towing this will transmission will move, its all mechanical, & at 60MPH you'll be at 1800 RPM or lower, as long as maintained these transmissions last!

The TH400 is a 3 speed as where the 700R4 is a 4 Speed with OD
1991 GMC Sierra 1500 SL 1/2 Ton Regular Cab, Long Box, 6.2L C-Code Detroit Diesel, 700R4 Transmission, RWD, 3:08, 1`000`000 Km & Counting All Original My Garage
1991 GMC Sierra 1500 SLE 1/2 Ton Extended Cab, Long Box, 6.2L C-Code Detroit Diesel, 700R4 Transmission, 3:73, 4X4, 315`000KM
1991 GMC Sierra 2500 SL 3/4 Ton Regular Cab, Long Box, 6.2L J-Code Detroit Diesel, 4L80E Transmission, 3:73, 4X4, 557`000KM
1994 GMC Sierra 3500 SLE 1 Ton Crew Cab, Long Box, Dually, 6.5L F-Code Detroit Turbo Diesel, 4L80E Transmission, 4:10, 4X4, 423`000KM, Dailey Driver
1988 GMC Sierra 1500 SL 1/2 Ton Extended Cab, Long Box, 5.0L H Code, TH400 (3L80) Transmission, RWD, 3:42, 306`000Km & Counting
1991 GMC Sierra 1500 SL 1/2 Ton Regular Cab, Long Box, 5.7L, 700R4 Transmission, RWD, 3:08, 256`000KM
Proud Member # 992 Of The 3500 Dually Club, # 40 Of The Old SOBs, # 117 The Regular Cab Club, Member Of The ODPC
Proud Fan Of The Montreal Canadiens

Last edited by JLanzino; 01-23-2013 at 11:27 PM.
Offline   Reply With Quote Quick reply to this message
Old 01-24-2013, 01:10 PM   #36 (permalink)
Diesel Master
happypunch's Avatar
Join Date: May 2011
Location: Boise, ID
Posts: 2,468
iTrader Score: 0 reviews

Old School Oil Burners (Old SOBs) Member

Another thing to look into with the engine not heating up: fan clutch. I am going through the same thing and just put in a high quality acdelco tstat and the same thing, its not warming up. This morning I replaced my block heater and refilled with coolant, bleed the air out and took it for a drive. 10 minutes of idling and 5 miles of driving and the fan is still blowing, even though I replaced the clutch last year... might just take the fan off today and run it like that.
1987 V20 Suburban 6.2 diesel
GM-3 Turbo
Built 4l60
3.73's With 285/75/16's

Gave it another chance at life and enjoying every minute
Offline   Reply With Quote Quick reply to this message
Old 01-24-2013, 03:29 PM   #37 (permalink)
Mad (Sean) Max
smackzed's Avatar
Join Date: Jan 2009
Posts: 7,917
iTrader Score: 1 reviews

Old School Oil Burners (Old SOBs) Member

Hey happy. I was in the same boat. Sunday no one open but a box store. Got a crappy t-stat and intsalled. I couldn't get a gasket so I used RTV sealant. So far this t-stat is working. Don't know if it's the t-stat or the rtv but I read a while ago that sometimes the gasket doesn't make a good seal, good enough for the housing not to leak but not enough for the coolant not to leak past the stat. Cheap and easy to try anyway
'87 GMC R2500 380,000km
AM/FM Radio -rebar except for engine trans and misc suspension parts

'90 GMC R3500 srw 3+3 310 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

Quick Reply

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.

PLEASE READ! You must check your email inbox for the confirmation link to complete registration. Please check your spam box if you do not see the email in your inbox.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
First time diesel owner Oregon GMC Introductions & New Trucks 3 04-13-2007 03:17 AM
First Time Diesel Owner RodZZilla Introductions & New Trucks 1 02-17-2007 02:50 PM
First Time Diesel Owner rspiecha Introductions & New Trucks 1 02-06-2007 12:04 AM
First time diesel owner, bought a 02 LB7, questions?? shocker45 Duramax First Generation: 2001-2004 (LB7) 14 06-27-2006 07:43 PM
First time diesel owner demp223 Introductions & New Trucks 2 02-05-2006 11:39 PM

All times are GMT -4. The time now is 09:06 PM.

Shoutbox provided by vBShout v6.2.1 (Lite) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
© AutoGuide

SEO by vBSEO 3.6.0