Underdrive pulley install
 

Ive got a quick question. I'm having trouble loosening the crank pulley nut. when trying to loosen the nut the other pulleys start to move. I then had my buddy use a wrench on the alternator nut adn go clockwise, while i went counter clockwise on the crank pulley nut trying to loosen it. yet the nut will nut budge. any help will be greatly appreciated.

thanks jon

If you have a 5 speed car just put it in gear, then you'll have to turn it a couple times but it will stop and you'll get it loosened. If it's an auto then I think you may be able to do it by having someone hold the flywheel with one of those flywheel turning tools. Not to sure on the auto though just a suggestion.

Bill

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00 GT, MAC Offroad H, Steeda Pulleys & Timing Adjuster, C&L 80mm, 4.30’s, Flows w/turndowns, UPR shifter, UPR Pro Series LCA’s, Lakewood 70/30’s & 50/50’s, 253.8 RWHP/292.8RWTQ
Best ET 12.91
Best MPH 105.49
M/M 100, 7085
2001 Mod Motor Shootout 2V NA Champion

The mechanic who did mine had a little trick, although I thought it was pretty crazy to do it, but it did save a lot of time.
He held the crank bolt w/ a huge almost 2ft long breaker bar and had a guy climb up into the car (it was 6.5ft in the air on a lift) and crank the engine. The bolt came loose that way. Now the guy is about 6'4" and 280lbs, so he had some strenth and weight behind the bar so it didn't wind up and smack him in the face. He even said it was dangerous, but told me it was a trick of the trade. It sure made quick work of getting the bolt loose.
I know this may not help you in a driveway install, but thats how it was done on my 4.6.

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1997 Thunderbird 4.6L: Dynomax cat-back, MN-12 perf. offroad downtubes and Y-pipe w/ Magnaflow resonator, 80mm MAF with cone filter, B&M trans cooler, Inject-Tech chip, MAC U/D pulleys, KVR front brake upgrade. 15.2 @ 91 before exhaust & pulleys. Not bad for a 3800lb auto 4.6L

No Longer own: 91 LX 5.0L 5 spd