under dash oily; leaks oil in cab on trans hump - The 1947 - Present Chevrolet & GMC Truck Message Board Network

redz 1970 K5 · 12-03-2004, 05:04 PM

So, my truck has had this problem now for quite a while... I actually put it to the back of my mind, and then thought- hey maybe someone knows what's going on and can help me figure this out. It drips very slowly onto the trans hump and when I put my hand behind the dash, I get an oily mess.

I am 99.9% sure (speculation- haven't poked under there yet) that it is an oil pressure line for the oil pressure guage. Is that correct?

I thought the oil pressure guage was a one wire sensor that went into the block... Now, my oil guage is definitely stock (or OEM looking anyways). My oil pressure guage works just fine.

So a) is the leak an oil pressure line, or b) what else might it be?

jhow66 · 12-03-2004, 05:10 PM

Stick head under dash. You will see copper line(oil pressure line). Tighten fitting on back of gauge. Remove head from under dash then try to work crick from neck. LOL

Mudder · 12-03-2004, 05:15 PM

Lmao................

redz 1970 K5 · 12-03-2004, 06:03 PM

Pretty funny... Thanks. You'll be here all week then?

**CUSTOM/10** · 12-03-2004, 06:28 PM

That"s probably what it is. Mine just let go this week but under the hood. Sprayed oil every ware. ( Mine was steel and rusted out )

Gary

Pilgrim · 12-03-2004, 06:58 PM

Rub oil on crick in neck...

Longhorn Man · 12-03-2004, 07:29 PM

You forgot step 3 - 5
#3 Wipe oil from haid and shoulders.
#4 Cuss
#5 clean truck floor.

Hooter · 12-04-2004, 01:40 AM

hey at least the oil leaking on the floor is inhibiting rust! maybe back it off all the way and throw some teflon on it, wouldnt hurt if the threads were damaged or cross threaded

imdarren · 12-04-2004, 02:18 AM

How many of us have taken out the guages for some reason, and forgot to put the oil line back in place, and started the truck ? ! ?

Same sort of mess you are talking about!! Got Rags ! ?

Darren

jimfulco · 12-04-2004, 02:37 AM

Cover your mouth.

redz 1970 K5 · 12-04-2004, 10:40 AM

Connection is nice and snug, so I will back it out and get some teflon tape in there.

Thanks again all! As always y'all have been there done that!

Senator350 · 12-04-2004, 03:21 PM

i had same problem... on both ends of the line. i got a kit from jegs for like 5 or 10 bucks. if the line is too far gone at either end you might have to replace like i did. it's easy except for getting to the block sending end of the line. meybe want to do it anyway... preventative maintenance?

cableguy0 · 12-04-2004, 03:28 PM

dont use teflon tape it wont seal. you need to get a new fitting for the end of the line or just buy the 10 dollar copper line kit that comes with fittings. dont waste your time with teflon its a compression fitting and uses the metal line to seal not the threads

12-03-2004, 05:04 PM	#1
redz 1970 K5 OBS guy Join Date: Jun 2004 Location: SoCal Posts: 1,060	under dash oily; leaks oil in cab on trans hump So, my truck has had this problem now for quite a while... I actually put it to the back of my mind, and then thought- hey maybe someone knows what's going on and can help me figure this out. It drips very slowly onto the trans hump and when I put my hand behind the dash, I get an oily mess. I am 99.9% sure (speculation- haven't poked under there yet) that it is an oil pressure line for the oil pressure guage. Is that correct? I thought the oil pressure guage was a one wire sensor that went into the block... Now, my oil guage is definitely stock (or OEM looking anyways). My oil pressure guage works just fine. So a) is the leak an oil pressure line, or b) what else might it be? __________________ 88 Suburban Goodies- Alpine, Auto Meter, BDS, Bilstein, B&M, BFG, Borgeson, Bushwhacker, Cowl hood, Flowmaster, Genuine Gear, Holley, Infinity, JVC, K&N, MB Wheels, MSD, Pioneer, Skyjacker, Sony, Thorley, Walker + more

12-03-2004, 05:10 PM	#2
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Stick head under dash. You will see copper line(oil pressure line). Tighten fitting on back of gauge. Remove head from under dash then try to work crick from neck. LOL __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

12-03-2004, 06:58 PM	#6
Pilgrim Registered User Join Date: Mar 2003 Location: Crescent City, FL Posts: 492	Rub oil on crick in neck... __________________ Bob 68 C20 Camper Special

12-04-2004, 01:40 AM	#8
Hooter My other Love Join Date: Aug 2001 Location: Castlegar B.C. Canada Posts: 4,085	hey at least the oil leaking on the floor is inhibiting rust! maybe back it off all the way and throw some teflon on it, wouldnt hurt if the threads were damaged or cross threaded __________________ Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life

12-04-2004, 02:18 AM	#9
imdarren Registered User Join Date: Oct 2001 Location: SW Washington Posts: 1,006	How many of us have taken out the guages for some reason, and forgot to put the oil line back in place, and started the truck ? ! ? Same sort of mess you are talking about!! Got Rags ! ? Darren __________________ Washington State 1967 Chevy C10 LWB Rodstoration In Progress. 1972 K20 Cheyenne Super

12-03-2004, 05:15 PM	#3
Mudder Registered User Join Date: Feb 2001 Location: East Central, MO Posts: 11,336	Lmao................

12-03-2004, 06:03 PM	#4
redz 1970 K5 OBS guy Join Date: Jun 2004 Location: SoCal Posts: 1,060	Pretty funny... Thanks. You'll be here all week then? __________________ 88 Suburban Goodies- Alpine, Auto Meter, BDS, Bilstein, B&M, BFG, Borgeson, Bushwhacker, Cowl hood, Flowmaster, Genuine Gear, Holley, Infinity, JVC, K&N, MB Wheels, MSD, Pioneer, Skyjacker, Sony, Thorley, Walker + more

12-03-2004, 06:28 PM	#5
CUSTOM/10 Senior Member Join Date: May 2003 Location: Sandown, NH Posts: 2,855	Oil That"s probably what it is. Mine just let go this week but under the hood. Sprayed oil every ware. ( Mine was steel and rusted out ) Gary

12-03-2004, 07:29 PM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	You forgot step 3 - 5 #3 Wipe oil from haid and shoulders. #4 Cuss #5 clean truck floor.

12-04-2004, 02:37 AM	#10
jimfulco Registered User Join Date: May 2003 Location: Shreveport LA Posts: 3,170	Cover your mouth.

12-04-2004, 10:40 AM	#11
redz 1970 K5 OBS guy Join Date: Jun 2004 Location: SoCal Posts: 1,060	Connection is nice and snug, so I will back it out and get some teflon tape in there. Thanks again all! As always y'all have been there done that! __________________ 88 Suburban Goodies- Alpine, Auto Meter, BDS, Bilstein, B&M, BFG, Borgeson, Bushwhacker, Cowl hood, Flowmaster, Genuine Gear, Holley, Infinity, JVC, K&N, MB Wheels, MSD, Pioneer, Skyjacker, Sony, Thorley, Walker + more

12-04-2004, 03:21 PM	#12
Senator350 Registered User Join Date: Feb 2004 Location: Albany, NY Posts: 522	i had same problem... on both ends of the line. i got a kit from jegs for like 5 or 10 bucks. if the line is too far gone at either end you might have to replace like i did. it's easy except for getting to the block sending end of the line. meybe want to do it anyway... preventative maintenance? __________________ RN U OVR

12-04-2004, 03:28 PM	#13
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	dont use teflon tape it wont seal. you need to get a new fitting for the end of the line or just buy the 10 dollar copper line kit that comes with fittings. dont waste your time with teflon its a compression fitting and uses the metal line to seal not the threads __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

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