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Doing a removal & replacement job and have got stuck on what thought would be a simple 13+16mm long bolt removal so need bit help especially if have done this exact job.
Right, come across many stuck nuts in my time and after dosing in all the unlocking sprays have got them all off eventually - until I came across this bad boy (pic below). Namely on a 2003 BCB engine MK4 Golf; the nuts+bolts for holding in the Air-Con Compressor consist of two long bolts; lower LHS is simple 16mm, upper is "Double Stud with Hexagon Drive : M10x115 / M8x15" VAG part №: N90633802. The second smaller nut that is on top of this bolt is the M8x15mm BUT is listed as "Shouldered Hex Nut, Self Locking" VAG part №: N02300313 and as you can see it becoming burred in my attempts to remove.
So, for weird (anti-vibration?!) reason the designers at VW Headquarters seemed to have put a 'Lock Nut' (non-Nylon) on a relatively simple long bolt that hold a rail that supports the Power Steering line. Now, there is no other way to get at the a/c compressor for removal or swinging it to side to remove the alternator above the compressor other than removing the first 13mm nut (M8) to get to the secondary 16mm (M10) BUT as the former is a Lock Nut it is doing its job of staying locked!!!
I have used firstly after the dosing of unlocking sprays; a 12 point socket, then read this is a no-no for Lock Nuts and only a Hex 6 pointer socket should be used.
Next step is the very old-school usual stuck nut tricks (hitting with a hammer to 'break' any seals / heating to expand for same reason) BUT this is listed as a LOCK-nut so really asking for advice on this aspect of unlocking a Lock-nut. Area too small to cut it off as will need to replace when putting all toys back in the pram.
So, anyone done this exact job with this EXACT same weird nut+bolt as have undone more bolts than hot-dinners so keep the 'use a spanner and extended ratchet (guaranteed to sheer a Lock nut and you're in a whole other world of knackered nut removal pain!!!)' / 'take it to a garage' or 'sell the car' answers to yourself as only those with the knowledge are being called upon here!!!
BTW Haynes manual had naff-all help & Bentley not a sniff too!
Right, come across many stuck nuts in my time and after dosing in all the unlocking sprays have got them all off eventually - until I came across this bad boy (pic below). Namely on a 2003 BCB engine MK4 Golf; the nuts+bolts for holding in the Air-Con Compressor consist of two long bolts; lower LHS is simple 16mm, upper is "Double Stud with Hexagon Drive : M10x115 / M8x15" VAG part №: N90633802. The second smaller nut that is on top of this bolt is the M8x15mm BUT is listed as "Shouldered Hex Nut, Self Locking" VAG part №: N02300313 and as you can see it becoming burred in my attempts to remove.
So, for weird (anti-vibration?!) reason the designers at VW Headquarters seemed to have put a 'Lock Nut' (non-Nylon) on a relatively simple long bolt that hold a rail that supports the Power Steering line. Now, there is no other way to get at the a/c compressor for removal or swinging it to side to remove the alternator above the compressor other than removing the first 13mm nut (M8) to get to the secondary 16mm (M10) BUT as the former is a Lock Nut it is doing its job of staying locked!!!
I have used firstly after the dosing of unlocking sprays; a 12 point socket, then read this is a no-no for Lock Nuts and only a Hex 6 pointer socket should be used.
Next step is the very old-school usual stuck nut tricks (hitting with a hammer to 'break' any seals / heating to expand for same reason) BUT this is listed as a LOCK-nut so really asking for advice on this aspect of unlocking a Lock-nut. Area too small to cut it off as will need to replace when putting all toys back in the pram.
So, anyone done this exact job with this EXACT same weird nut+bolt as have undone more bolts than hot-dinners so keep the 'use a spanner and extended ratchet (guaranteed to sheer a Lock nut and you're in a whole other world of knackered nut removal pain!!!)' / 'take it to a garage' or 'sell the car' answers to yourself as only those with the knowledge are being called upon here!!!
BTW Haynes manual had naff-all help & Bentley not a sniff too!
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