Tow hook thread size?

iqraceworks · 03-01-2021, 12:52 PM

I'm getting ready to replace the oil pan gasket on my 07' 335i coupe. I went to thread in the factory tow hook to the threaded hole next to the oil filter that's used to lift the engine. Not sure what tow hook the guy gave me when I bought the car, but the thread diameter is way to big to thread into the threaded hole in the block.

Anyone know what size threads are in that hole in the block? I might just fold a bolt that's the right size locally, and weld a loop on the top to lift with.

Thanks!

ewicky · 03-01-2021, 04:34 PM

Just take your engine into the local hardware store and test fit all the different bolt sizes they offer.

Honestly I doubt any normal hardware store would have heavy duty bolts with that thread. It's thicc

relative4 · 03-01-2021, 04:38 PM

Those threads are not machine threads per se. You need a BMW tow hook. $15 on eBay.

A pic of the hook you have would be good. Inspect it carefully for a part number.

ewicky · 03-01-2021, 04:59 PM

Also, did you try threading the tow hook into the bumper, F&R?
Just as a sanity check. Like, maybe the tow hook is correct and it's the hole in the engine that's not right.

Tyc0 · 03-01-2021, 05:23 PM

Yeah I would be surprised if the hook was too big, the one I have is already massive, maybe your using wrong hole?

relative4 · 03-01-2021, 06:51 PM

Quote:

Originally Posted by Tyc0

Yeah I would be surprised if the hook was too big, the one I have is already massive, maybe your using wrong hole?

OK gentlemen, remember this is a family website.

iqraceworks · 03-01-2021, 07:13 PM

Quote:

Originally Posted by Tyc0

Yeah I would be surprised if the hook was too big, the one I have is already massive, maybe your using wrong hole?

It's not like there is a lot of options as far as threaded holes in the N54 block right next to the oil filter housing.....

Tyc0 · 03-01-2021, 11:04 PM

Ur not wrong, guess your only option is to order a new hook

stewbets · 03-02-2021, 12:31 AM

Pics or it didn't happen.

I had to grind down the shoulder of my tow hook so it's would clear the valve cover.

Kenneykickin · 04-20-2024, 11:14 AM

More info on this? Using my tow hook but it only threads in like 1/2 rhe way. Prob be fine but meh

03-01-2021, 12:52 PM	#1
iqraceworks Brigadier General 2001 Rep 3,731 Posts Drives: 2007 335i Join Date: Aug 2019 Location: Missouri iTrader: (0)	Tow hook thread size? I'm getting ready to replace the oil pan gasket on my 07' 335i coupe. I went to thread in the factory tow hook to the threaded hole next to the oil filter that's used to lift the engine. Not sure what tow hook the guy gave me when I bought the car, but the thread diameter is way to big to thread into the threaded hole in the block. Anyone know what size threads are in that hole in the block? I might just fold a bolt that's the right size locally, and weld a loop on the top to lift with. Thanks! __________________ 2007 335i, BMS DCI, BMS Chargepipe w/Tial BOV, ARM Catless Downpipes, silicone inlets, Bilstein B12 Prokit Suspension, Whiteline subframe bushings, Front/Rear M3 control arms, G-Plus FMIC, Stage 2 LPFP, Custom E40 tune by Justin (V8Bait), xHP stage 3 transmission flash, RB Two Turbos....10.90 @ 128mph
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03-01-2021, 04:34 PM	#2
ewicky Lieutenant 204 Rep 525 Posts Drives: '07 335xi 4D AT Join Date: Jan 2017 Location: Seattle, WA iTrader: (0)	Just take your engine into the local hardware store and test fit all the different bolt sizes they offer. Honestly I doubt any normal hardware store would have heavy duty bolts with that thread. It's thicc
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03-01-2021, 04:38 PM	#3
relative4 Major 611 Rep 1,272 Posts Drives: '08 335xi E90 MT stage 1+ Join Date: Feb 2019 Location: Denver, CO iTrader: (0)	Those threads are not machine threads per se. You need a BMW tow hook. $15 on eBay. A pic of the hook you have would be good. Inspect it carefully for a part number.
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03-01-2021, 04:59 PM	#4
ewicky Lieutenant 204 Rep 525 Posts Drives: '07 335xi 4D AT Join Date: Jan 2017 Location: Seattle, WA iTrader: (0)	Also, did you try threading the tow hook into the bumper, F&R? Just as a sanity check. Like, maybe the tow hook is correct and it's the hole in the engine that's not right.
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03-01-2021, 05:23 PM	#5
Tyc0 Lieutenant 147 Rep 517 Posts Drives: BMW e92 335i Join Date: Sep 2019 Location: Oregon iTrader: (0)	Yeah I would be surprised if the hook was too big, the one I have is already massive, maybe your using wrong hole?
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03-01-2021, 11:04 PM	#8
Tyc0 Lieutenant 147 Rep 517 Posts Drives: BMW e92 335i Join Date: Sep 2019 Location: Oregon iTrader: (0)	Ur not wrong, guess your only option is to order a new hook
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03-02-2021, 12:31 AM	#9
stewbets Captain 449 Rep 823 Posts Drives: '08 335xi, '04 545i Join Date: Sep 2019 Location: Dayton, OH iTrader: (0)	Pics or it didn't happen. I had to grind down the shoulder of my tow hook so it's would clear the valve cover.
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04-20-2024, 11:14 AM	#10
Kenneykickin ///Kenney 82 Rep 746 Posts Drives: 09 335i / 06 330xi Join Date: Aug 2015 Location: Idaho iTrader: (0)	More info on this? Using my tow hook but it only threads in like 1/2 rhe way. Prob be fine but meh
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