Oil lines
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timothy_nd28
- SE Member

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- Year and Trim: 1994 ssei
Oil lines
Have been using Q horspower synth oil for awhile now, decided to change to Mobile 1 synthetic last oil change. Lower oil pressure, and now I have small oil spots on my driveway.
I think the leak is coming from the oil lines from the oil filter to the radiator. Where can I get these at?
I think the leak is coming from the oil lines from the oil filter to the radiator. Where can I get these at?
- irkwerks2
- SSE Member

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- Joined: Wed May 21, 2008 10:44 pm
- Year and Trim: 1999 SLE L36
- Location: Pontiac, Michigan
Re: Oil lines
Tim,
The oil lines from your engine to your radiator are for the transmission oil.
The spots on your driveway would be pinkish/red in color if they are leaking.
If indead you are leaking "motor oil" the valve covers or the oil pan are the place to start looking.
The oil lines from your engine to your radiator are for the transmission oil.
The spots on your driveway would be pinkish/red in color if they are leaking.
If indead you are leaking "motor oil" the valve covers or the oil pan are the place to start looking.
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timothy_nd28
- SE Member

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- Year and Trim: 1994 ssei
Re: Oil lines
I replaced those transmission lines last month, partly because the tow truck driver towed the car back to my house, ripping off the trans lines while backing the car in the driveway. Partly my fault, it was a huge snow bank at the skirt of the driveway and I should of shoveled it before that guy came.
I remember seeing 2 lines threaded into the oil filter area, going towards the front of the car, assuming it goes to the radiator. It looked stock, I don't think it was added on by the previous owner. Guide me in the right direction with this
I remember seeing 2 lines threaded into the oil filter area, going towards the front of the car, assuming it goes to the radiator. It looked stock, I don't think it was added on by the previous owner. Guide me in the right direction with this
- irkwerks2
- SSE Member

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Re: Oil lines
I'm not sure what you are refering to , but I'm sure one of the gearheads will chime in soon.
- harofreak00
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Re: Oil lines
Those are indeed oil lines.

Can you tell where its leaking? At the fittings?

Can you tell where its leaking? At the fittings?
Andrew - owner/operator of Bonnevilles Unlimited

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2004 Bonneville GXP | 60k | White Gold Tricoat | custom built supercharged 3800 hot rod | garage queen
1997 Corvette | 57k | Silver Metallic | Z06 wheels | Date-night Hauler/Parts runner
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Billha
- Posts like an L27

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2002 Park Ave Ultra 88,000mi - Location: southern Ca
Re: Oil lines
The fittings have leaked on my '93 SSEi since I bought it in '99, and I've heard that this isn't uncommon. On mine, the oil drips down onto the rubber on the lower suspension bushing and onto the oil filter.
I've tried tightening the fittings, but didn't have the right types of wrenches; I think you need a large flare wrench or a special wrench for the larger of the 2 fittings. My open-end wrenches and crescent wrenches have too much steel around the working end, and don't fit in the tight space around the fitting.
If this is where yours is leaking, maybe you'll have better luck than I have.
I've tried tightening the fittings, but didn't have the right types of wrenches; I think you need a large flare wrench or a special wrench for the larger of the 2 fittings. My open-end wrenches and crescent wrenches have too much steel around the working end, and don't fit in the tight space around the fitting.
If this is where yours is leaking, maybe you'll have better luck than I have.
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timothy_nd28
- SE Member

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Re: Oil lines
The oil spots left on my driveway are about 2" diameter and at a rate of every morning. These spots are located just off center, towards the driver side alittle, under the radiator. I have tried looking for this tiny leak from looking above. I assumed those steel fittings at the oil filter area, turns into rubber and connects to that side of the radiator, which I'm seeing the oil spots in the morning. I should get under this car to visually inspect, but I have been lazy of doing that, and assuming it's the rubber steel lines, kinda like the tranny ones that I just replaced not that long ago, it's due for replacement.
I'm pretty sure it's not leaking from the fittings. I have had the engine out about 2 years ago, and kinda recall taking those fittings off to pull the engine. I have a terrible memory. If I did, they were put back on tight, plus I have no oil in the driveway, in that area.
I have been calling the local autoparts stores, and no one has such a oil line for this car. Has anyone else replaced these before? They do sell the connector that threads into that oil filter assy.
I'm pretty sure it's not leaking from the fittings. I have had the engine out about 2 years ago, and kinda recall taking those fittings off to pull the engine. I have a terrible memory. If I did, they were put back on tight, plus I have no oil in the driveway, in that area.
I have been calling the local autoparts stores, and no one has such a oil line for this car. Has anyone else replaced these before? They do sell the connector that threads into that oil filter assy.
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timothy_nd28
- SE Member

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- Joined: Sat Jan 03, 2009 12:19 am
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Re: Oil lines
Changed the oil today, did a complete inspection under the car. As I suspected, 2 oil lines,,,steel at the oil filter area, turning into rubber, then back to steel as it enters the radiator. Oil is seeping out at the transistion where rubber meets steel.
I have called all local autopart stores in town, and no-one has such a thing listed in their catalogs. It's funny, they all have the trans lines in stock, but nothing listed for the oil lines. They all say it's not a OEM cooler, and I'm on my own,,,WTF!!!
Am I the first one to ever replace these? Is there a secret place where I can purchase these, or is this a custom deal at the local hydraulic shop?
I have called all local autopart stores in town, and no-one has such a thing listed in their catalogs. It's funny, they all have the trans lines in stock, but nothing listed for the oil lines. They all say it's not a OEM cooler, and I'm on my own,,,WTF!!!
Am I the first one to ever replace these? Is there a secret place where I can purchase these, or is this a custom deal at the local hydraulic shop?
- Roadrunner
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Re: Oil lines
Dealer only item. I think one is $50 and the other is like $30 IIRC.
Also, you might be able have yours repaired at a hydraulic shop if not in too bad shape.
Also, you might be able have yours repaired at a hydraulic shop if not in too bad shape.
- irkwerks2
- SSE Member

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- Year and Trim: 1999 SLE L36
- Location: Pontiac, Michigan
Re: Oil lines
GM Parts Direct has them...Upper $31.02
Lower $20.34
There were no part numbers, described as Oil cooling lines.
Alot of people are not too happy with GMPD and their shipping (30 + days), but if you take these prices to a dealer he MAY match them for you.
Hope this helps.
Lower $20.34
There were no part numbers, described as Oil cooling lines.
Alot of people are not too happy with GMPD and their shipping (30 + days), but if you take these prices to a dealer he MAY match them for you.
Hope this helps.
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wjcollier07
- Certified Bonneville Nut

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Re: Oil lines
There's good and bad to this.
Bad-
Oil cooler lines are simply not available for the SSEs and SSEis with auxiliary oil coolers. The only lines available are usually for the Chevy 4.3 that have a remote filter setup, and those lines leak, constantly, so even GM sees a good reason to keep those in stock, otherwise, its quite a problem. I BELIEVE VPI has them still however, you may want to give them a call...or your local dealer should be able to order them from VPI for you.
On a side note, your transmission lines are probably due for replacing as well, and not replacing them can lead to a nice underhood fire, not all too uncommon. Good news here, those ARE available...and quite affordable. Edelmann has the best IMO, and the closest to a perfect OE match. Dorman has whatever Edelmann doesn't, but I've not found many times where that's the case.
Good-
An option, and this is only an opinion if you're short on money and can't have it done professionally... with a hydraulic steel pipe cutter, (cheap item, found in many hardware and parts stores) cut just past the rubber hose crimps, then with a flaring tool (not AS cheap, but still widely available) make yourself a small beaded hose connection, and with some HIGH TEMP (302 degree, i forget the spec number) hose (I believe it'll be 1/2" ID, POSSIBLY 3/8" ID, be sure to verify) make up the same connection with hose clamps on that freshly beaded connection. No reason for it to leak then.
It's not the perfect way of doing it, but, it is inexpensive, it should stop the leak, and I can't see why you'd have any problem doing it.
I'll continue looking for some part numbers.
Bad-
Oil cooler lines are simply not available for the SSEs and SSEis with auxiliary oil coolers. The only lines available are usually for the Chevy 4.3 that have a remote filter setup, and those lines leak, constantly, so even GM sees a good reason to keep those in stock, otherwise, its quite a problem. I BELIEVE VPI has them still however, you may want to give them a call...or your local dealer should be able to order them from VPI for you.
On a side note, your transmission lines are probably due for replacing as well, and not replacing them can lead to a nice underhood fire, not all too uncommon. Good news here, those ARE available...and quite affordable. Edelmann has the best IMO, and the closest to a perfect OE match. Dorman has whatever Edelmann doesn't, but I've not found many times where that's the case.
Good-
An option, and this is only an opinion if you're short on money and can't have it done professionally... with a hydraulic steel pipe cutter, (cheap item, found in many hardware and parts stores) cut just past the rubber hose crimps, then with a flaring tool (not AS cheap, but still widely available) make yourself a small beaded hose connection, and with some HIGH TEMP (302 degree, i forget the spec number) hose (I believe it'll be 1/2" ID, POSSIBLY 3/8" ID, be sure to verify) make up the same connection with hose clamps on that freshly beaded connection. No reason for it to leak then.
It's not the perfect way of doing it, but, it is inexpensive, it should stop the leak, and I can't see why you'd have any problem doing it.
I'll continue looking for some part numbers.
John
Now: '15 Toyota Prius III | 134 hp 2ZR-FXE | Silver | 36k
Now: '03 Honda CR-V AWD | Slow 4-Cylinder | Dirt | 180k
Then: '07 Ford Fusion SEL | 221hp Gen I VVT Duratec 3.0 V6 | Tungsten Silver | 150k
Then: '99 Toyota Avalon XL | 200hp 1MZ-FE 3.0 V6 | Diamond White | 189k | Sold: July 2015
Then: '11 Ford Fusion SEL | 240hp Gen II VVT Duratec 3.0 V6 | Ingot Silver | 84k | Totaled: Oct 23 '14 (Rear-Ended)
Then: '96 Buick Park Avenue Ultra | 240hp Series II L67 | Medium Dark Lichen | Bought: JAN 11 @ 135k | Accident: FEB 3 '12 | Crushed: MAR 1 '13 @ 153K
Then: '98 Pontiac Bonneville SSE | 205hp Series II 3800 L36 | Topaz Firemist | Bought: NOV '09 @ 74k | Accident: MAY 28 '10 | Crushed: MAR 15 '11 @ 84k
Then: '93 Pontiac Bonneville SE | 170hp Series I 3800 L27 | Dark Yellow Green | Bought: JULY '07 @ 92k | Sold: JULY '12 @ 118k
Then: '89 Pontiac Bonneville LE | 165hp 3800 LN3 | Medium Garnet Red | Bought: JAN '05 @ 117k | Sold: SEP 30 '07 @ 152k
Now: '15 Toyota Prius III | 134 hp 2ZR-FXE | Silver | 36k
Now: '03 Honda CR-V AWD | Slow 4-Cylinder | Dirt | 180k
Then: '07 Ford Fusion SEL | 221hp Gen I VVT Duratec 3.0 V6 | Tungsten Silver | 150k
Then: '99 Toyota Avalon XL | 200hp 1MZ-FE 3.0 V6 | Diamond White | 189k | Sold: July 2015
Then: '11 Ford Fusion SEL | 240hp Gen II VVT Duratec 3.0 V6 | Ingot Silver | 84k | Totaled: Oct 23 '14 (Rear-Ended)
Then: '96 Buick Park Avenue Ultra | 240hp Series II L67 | Medium Dark Lichen | Bought: JAN 11 @ 135k | Accident: FEB 3 '12 | Crushed: MAR 1 '13 @ 153K
Then: '98 Pontiac Bonneville SSE | 205hp Series II 3800 L36 | Topaz Firemist | Bought: NOV '09 @ 74k | Accident: MAY 28 '10 | Crushed: MAR 15 '11 @ 84k
Then: '93 Pontiac Bonneville SE | 170hp Series I 3800 L27 | Dark Yellow Green | Bought: JULY '07 @ 92k | Sold: JULY '12 @ 118k
Then: '89 Pontiac Bonneville LE | 165hp 3800 LN3 | Medium Garnet Red | Bought: JAN '05 @ 117k | Sold: SEP 30 '07 @ 152k

