removal of crankshaft pulley bolt?

[the_doc735]

will a 450 Nm impact wrench remove the crankshaft pulley bolt on a 1.6 zetec SE petrol engine?

I have tried breaker bars, chain wrenches, rubber loop wrenches, long handle spanners, tapping with hammer and heat treatment, plus release oil; all with no effect at all except to bust the timing slots in the camshafts (with a timing bar). Spent endless hours on this scenario and its beginning to wear me down!!! ~ How the hell do I shift this bolt? I have also tried two very very strong men pulling in opposite directions which didn't work (except for causing one of them great personal injury!).

Advice please....

cheers, many many thanx!!!

PS: the pulley itself is smooth and flat with NO holes for a holding tool to insert. It's actually a double pulley with the larger one nearest to the block and a slightly smaller pulley in front of it.

[Sponsor]

[sailor]

Posted via FF MobileHave at it! Alternating directions sometimes is the trick for the REAL stubborn ones. Shortest socket that fits and NO extension if possible. (extension soaks up the impact). Bloody thing isn`t reverse threaded is it? (anyone knowledgeable chime in now...) Luck!

[mikeeshaq]

Hmmm...
Reverse threaded....
imagine if that bolt was loose, now what is the normal rotation of the engine?
Would the loose bolt start to turn in or out?

The design engineers would have made it turn in for normal running

[a_2000_se]

Engine rotation is clockwise looking into the pulley and Bolt is not reverse threaded as I recall - for a U.S. SOHC SPI.

Are you sure you really want to use an impact on that bolt?

[the_doc735]

Originally Posted by a_2000_se

Are you sure you really want to use an impact on that bolt?

not sure ...no

[the_doc735]

Originally Posted by sailor

Posted via FF MobileBloody thing isn`t reverse threaded is it?

my main dealer says it's anti clockwise to release that bolt.

[the_doc735]

Originally Posted by mikeeshaq

Hmmm...
Reverse threaded....
imagine if that bolt was loose, now what is the normal rotation of the engine?
Would the loose bolt start to turn in or out?

don't know?

[sailor]

Posted via FF MobileJust covering all bases w/reverse thread question... (would turn out) Why NOT use impact? Normal tool when you can get at it with one... Reversing directions with an impact helps remove stuck bolts - Same as with wrench but more so as impact gets a better "hit" when you catch it`s mechanism just right - back & forth gets you that extra impact ...

[zetecDon]

To loosen the crankshaft pulley bolt you have to turn it counter clockwise. I just recently did this when I changed my timing belt. I used an impact on mine and it took it right off of there without any issues.

[sailor]

Posted via FF Mobile^^^^ Now that sounds normal..... Can be hard without impact, no way to hold firmly....