Your Truck Source

Your Truck Source


 
RULES  HomeHome  PortalPortal  CalendarCalendar  FAQFAQ  RegisterRegister  Log inLog in  
Have you told all your friends about the excitement here at MyTruckSource.com?
Have a new ride you want to show off? Or you want to see our other members rides? Check out our PRIDE & JOY Forum!

Share | 
 

 1991 6.2 chevy diesel help

Go down 
Go to page : 1, 2  Next
AuthorMessage
batty1214
Valued Member
Valued Member
avatar

Posts : 448

Age : 34
Location : Utah

PostSubject: 1991 6.2 chevy diesel help   December 30th 2009, 5:40 pm

okay gentlemen....... my parents have recently bought a 91 suburban, with a 6.2, 3 speed automatic, 3/4 ton..... its got a diesel tank heater, fuel line/ fuel filter heater, and block heater on it...... runs good, strong running...... heres the problem....... it never warms up.... i drove it 120 miles, and the motor never warmed up enough to move the water temp gauge..... it wasnt even warm enough to defrost the windshield, the whole trip.... i got back, replaced the thermostat, water temp sender, and hooked a manual temp gauge up as well.... drove it around for 30 minutes, and still eont warm up..... what the #@#@?...... im out of ideas on this one.. any thing else to look at? oh, i blocked the radiator even, and no dice.
Back to top Go down
007jimmy
Moderator
Moderator
avatar

Posts : 1955

Age : 34
Location : levittown, PA

PostSubject: Re: 1991 6.2 chevy diesel help   December 30th 2009, 7:27 pm

perhaps the temp guage is wrong and maybe the heater core is clogged up.. i dont know deisel trucks to well but i would imagine the cooling system isnt much different... i know we installed to cold ot a t-stat on my buddies eclipse and it wouldnt heat up worth crap..
Back to top Go down
batty1214
Valued Member
Valued Member
avatar

Posts : 448

Age : 34
Location : Utah

PostSubject: Re: 1991 6.2 chevy diesel help   December 30th 2009, 8:57 pm

well, its got a 190 thermostat, a electric and manual temperature gauges on it..... i just replaced the sender and stock gauge, and installed the manual gauge.....
Back to top Go down
semocoachworks
Valued Member
Valued Member
avatar

Posts : 153

Age : 43
Location : rapid city south dakota

PostSubject: Re: 1991 6.2 chevy diesel help   December 30th 2009, 9:01 pm

Try cardboard over the grill and see if it heats up anymore. If it does, you can get a velcro winterfront made or a snap on one. Just make sure you dont completely close the grill off to the incoming air. Also, does it have a rear heater? If it's very cold, the antifreeze in the rear heat lines run down the frame and it really cools it off because it disappates into the frame.
Back to top Go down
1993GMCSierra
Hyperactive Member
Hyperactive Member
avatar

Posts : 830

Age : 26
Location : Surry, VA

PostSubject: Re: 1991 6.2 chevy diesel help   December 30th 2009, 9:06 pm

IIRC, there are two senders for water temp.

One, for the gauge, and one for the ECU.


If the one for the ECU is bad, it could result in that.


Providing it has two, of course.
Back to top Go down
batty1214
Valued Member
Valued Member
avatar

Posts : 448

Age : 34
Location : Utah

PostSubject: Re: 1991 6.2 chevy diesel help   December 30th 2009, 9:25 pm

it doesnt have rear air, i tried blocking off the radiator, and it didnt do anything after 45 minutes of idling.
Back to top Go down
batty1214
Valued Member
Valued Member
avatar

Posts : 448

Age : 34
Location : Utah

PostSubject: Re: 1991 6.2 chevy diesel help   December 30th 2009, 9:27 pm

where would i find the sending unit for the ecu?
Back to top Go down
007jimmy
Moderator
Moderator
avatar

Posts : 1955

Age : 34
Location : levittown, PA

PostSubject: Re: 1991 6.2 chevy diesel help   December 30th 2009, 10:00 pm

its a deisel truck so it only has one sensor.. should be at the back of the block by the exhuast manifold..
Back to top Go down
semocoachworks
Valued Member
Valued Member
avatar

Posts : 153

Age : 43
Location : rapid city south dakota

PostSubject: Re: 1991 6.2 chevy diesel help   December 30th 2009, 10:03 pm

I think it's on the back of one of the heads.
Back to top Go down
batty1214
Valued Member
Valued Member
avatar

Posts : 448

Age : 34
Location : Utah

PostSubject: Re: 1991 6.2 chevy diesel help   December 30th 2009, 10:19 pm

i replaced the one on the back of the block, and no change.
Back to top Go down
007jimmy
Moderator
Moderator
avatar

Posts : 1955

Age : 34
Location : levittown, PA

PostSubject: Re: 1991 6.2 chevy diesel help   December 30th 2009, 10:29 pm

is there one by your thermostat house.. thats about the only 2 places i know to look.. if it has electric fans then put a switch inline with the wires and youll just have to check the temp guage to turn it on and cool it off..
Back to top Go down
johnboggs21
Almost Addicted Member
Almost Addicted Member
avatar

Posts : 1171

Age : 26
Location : Michigan

PostSubject: Re: 1991 6.2 chevy diesel help   December 30th 2009, 10:33 pm

batty1214 wrote:
it doesnt have rear air, i tried blocking off the radiator, and it didnt do anything after 45 minutes of idling.

diesels dont make much heat idling. Try blocking off part of the rad. and driving it around the mile. I know my 7.3 never gets really warm in the winter.........
Back to top Go down
merlin5577
Admin
Admin
avatar

Posts : 2938

Age : 33
Location : Taunton, MA

PostSubject: Re: 1991 6.2 chevy diesel help   December 30th 2009, 10:54 pm

Is the block a 'c' code or a 'j'code? IIRC the 'j' code motors have 2 thermostats. Its possible one is stuck open.

================================================
-Robert.
My Fleet;

2011 Volkswagen Jetta TDI 2.0L 6A
2010 Chevrolet Malibu LT 2.4L 6A
2003 Chevrolet Silverado LS 6.6L 5A
1997 GMC Suburban SLT 5.7L 4A


"If you dont stand behind our troops, feel free to stand in front of them."

New Idea
Back to top Go down
batty1214
Valued Member
Valued Member
avatar

Posts : 448

Age : 34
Location : Utah

PostSubject: Re: 1991 6.2 chevy diesel help   December 30th 2009, 11:06 pm

i dunno what code the motor is....ill have to look tommorow.... where would the 2nd thermostat be?
Back to top Go down
merlin5577
Admin
Admin
avatar

Posts : 2938

Age : 33
Location : Taunton, MA

PostSubject: Re: 1991 6.2 chevy diesel help   December 30th 2009, 11:07 pm

Do you have the VIN? I could tell you from that.

================================================
-Robert.
My Fleet;

2011 Volkswagen Jetta TDI 2.0L 6A
2010 Chevrolet Malibu LT 2.4L 6A
2003 Chevrolet Silverado LS 6.6L 5A
1997 GMC Suburban SLT 5.7L 4A


"If you dont stand behind our troops, feel free to stand in front of them."

New Idea
Back to top Go down
batty1214
Valued Member
Valued Member
avatar

Posts : 448

Age : 34
Location : Utah

PostSubject: Re: 1991 6.2 chevy diesel help   December 31st 2009, 2:14 am

i dont have it here, but can get it in the morning.
Back to top Go down
76silverado
Valued Member
Valued Member
avatar

Posts : 443

Age : 25
Location : NW Arkansas

PostSubject: Re: 1991 6.2 chevy diesel help   December 31st 2009, 11:51 pm

Get a power inverter and a small electric heater. Problem solved lol!
Back to top Go down
batty1214
Valued Member
Valued Member
avatar

Posts : 448

Age : 34
Location : Utah

PostSubject: Re: 1991 6.2 chevy diesel help   December 31st 2009, 11:58 pm

thats what my dads been doing, and its not working real well, but it does beat walking to work.
Back to top Go down
76silverado
Valued Member
Valued Member
avatar

Posts : 443

Age : 25
Location : NW Arkansas

PostSubject: Re: 1991 6.2 chevy diesel help   January 1st 2010, 11:54 pm

Well, ya gotta make do with what you got.
Back to top Go down
merlin5577
Admin
Admin
avatar

Posts : 2938

Age : 33
Location : Taunton, MA

PostSubject: Re: 1991 6.2 chevy diesel help   January 3rd 2010, 1:50 pm

Have you checked the fan clutch? If its staying engaged in the cold weather it would be very difficult to warm the engine up.

================================================
-Robert.
My Fleet;

2011 Volkswagen Jetta TDI 2.0L 6A
2010 Chevrolet Malibu LT 2.4L 6A
2003 Chevrolet Silverado LS 6.6L 5A
1997 GMC Suburban SLT 5.7L 4A


"If you dont stand behind our troops, feel free to stand in front of them."

New Idea
Back to top Go down
$/$-AMX
Valued Member
Valued Member
avatar

Posts : 125

Age : 38
Location : Madison, WI.

PostSubject: Re: 1991 6.2 chevy diesel help   January 5th 2010, 1:40 pm

Ok whats the water temp on your 6.2 Diesel ?

Dose your heater fan blow air ? its just cold ?

Mike


Last edited by $/$-AMX on January 5th 2010, 2:02 pm; edited 2 times in total (Reason for editing : no sig. . .)
Back to top Go down
batty1214
Valued Member
Valued Member
avatar

Posts : 448

Age : 34
Location : Utah

PostSubject: Re: 1991 6.2 chevy diesel help   January 5th 2010, 5:09 pm

oh, its not even at 120...... and the heater blows cold, even after 3 hours of driving, it is still cold
Back to top Go down
$/$-AMX
Valued Member
Valued Member
avatar

Posts : 125

Age : 38
Location : Madison, WI.

PostSubject: Re: 1991 6.2 chevy diesel help   January 6th 2010, 12:12 am

Ok, has the thermostat been replaced lately ? . . .

if so you might want to pull it out and check it sounds to be stuck open, due to some thing caught in in it or a weak spring, i have had new's fail on me . . .

Mike
Back to top Go down
batty1214
Valued Member
Valued Member
avatar

Posts : 448

Age : 34
Location : Utah

PostSubject: Re: 1991 6.2 chevy diesel help   January 6th 2010, 8:59 pm

I have replaced the thermostat twice....... after I pulled the 2nd one, I started heating water, and at 190, it opened just as it should.............. so, I reinstalled it........ I have blocked off the radiator, replaced the thermostat, I havent checked the fan clutch yet, dad had it, and I didnt have time to wait.
Back to top Go down
merlin5577
Admin
Admin
avatar

Posts : 2938

Age : 33
Location : Taunton, MA

PostSubject: Re: 1991 6.2 chevy diesel help   January 6th 2010, 9:13 pm

I'm still betting its the fan clutch.

================================================
-Robert.
My Fleet;

2011 Volkswagen Jetta TDI 2.0L 6A
2010 Chevrolet Malibu LT 2.4L 6A
2003 Chevrolet Silverado LS 6.6L 5A
1997 GMC Suburban SLT 5.7L 4A


"If you dont stand behind our troops, feel free to stand in front of them."

New Idea
Back to top Go down
Sponsored content




PostSubject: Re: 1991 6.2 chevy diesel help   

Back to top Go down
 
1991 6.2 chevy diesel help
Back to top 
Page 1 of 2Go to page : 1, 2  Next
 Similar topics
-
» Has anyone else swapped in a diesel, air-cooled or water?
» YANMAR 24 HP DIESEL TRACTOR
» Bad diesel fuel
» 1991 Eagles Kelly Green Jersey eBay number 230789758954
» 1991 Burnie Gift on YouTube

Permissions in this forum:You cannot reply to topics in this forum
Your Truck Source :: Trucks :: General motors-
Jump to: