advise on breaking loose a rusted fuel filter? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 12-14-2005, 03:29 PM   #11
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The fuel line nut should be 5/8” and the filter nut 20mm.
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Old 12-14-2005, 03:30 PM   #12
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Ron.. our cars are metric
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Old 12-14-2005, 06:42 PM   #13
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“You are correct sir.”

The fuel line nut measures 16mm but a 5/8” line wrench fits it just right.

Snap-on and TRW line wrench fits just right.
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Old 12-14-2005, 07:04 PM   #14
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Quote:
Originally Posted by BillBoost37
i've changed two this way.

Release fuel pressure... get car in air.

Undo the quick release and put a line wrench on the fuel line nut. Then using another wrench turn the fuel filter...holding the line wrench steady. Do not let the line wrench turn and damage the fuel line.
That'* how I did mine, I just used a vice grip to hold the fuel line nut steady
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Old 12-15-2005, 07:26 PM   #15
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ATTENTION EVERYONE, WE MUST BUILD AN IDOL OF RIDICULOUS PROPORTION TO THE PB BLASTER AND WORSHIP IT AS A GOD

seriously tho, the other day i used a whole can of the shop'* 'power-lube' on that filter, today i sprayed a generous amoutn of pb blaster on, waited a few minutes and it broke loose instantly, didnt even have to use the visegrips and i didnt have to strip any nut heads
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Old 12-15-2005, 08:36 PM   #16
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Yup. The PB is good stuff!
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Old 12-16-2005, 11:21 AM   #17
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Two things to keep on hand. PB and brake cleaner. I never stay home without them.
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Old 12-16-2005, 12:05 PM   #18
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your shops lube probably had a chance to soak in overnight.
Most penetrants work best if you spray them the night before and let hot and cold get at the fitting.
I too used a 5/8 snap on line wrench on my 90 when it was rusted. Had to spray it a couple of days before it would come loose. Think I used a vice grip on the filter side.
Didn't care if the filter got damaged, I was throwing it away anyway.
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Old 12-16-2005, 06:28 PM   #19
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Quote:
Originally Posted by SSEBONNE4EVA
your shops lube probably had a chance to soak in overnight.
Most penetrants work best if you spray them the night before and let hot and cold get at the fitting.
I too used a 5/8 snap on line wrench on my 90 when it was rusted. Had to spray it a couple of days before it would come loose. Think I used a vice grip on the filter side.
Didn't care if the filter got damaged, I was throwing it away anyway.
doubtful cause i cleaned the shop lube off with brakleen before i putmy car back down so unless some trace amounts managed to work their way thru the shoplube did nothing
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