Water Pump Bolts Removal ???

X5-D-Sport · Post by **X5-D-Sport** » Sat Feb 14, 2015 10:48 pm

E53 2004 Facelift diesel 218..

Went to replace the thermostat today....
to discover the most ridiculous bolts ever put on a vehicle... possibly to prevent over tightening I guess...

Like tapered Torx heads... sockets wont remove them...

Any one know what they are called, so I can get some special sockets to remove them ??

Greydog · Post by **Greydog** » Sun Feb 15, 2015 8:09 am

Real OEM says M7 x 38 torx screw. Maybe someone has been there before and damaged them?

X5-D-Sport · Post by **X5-D-Sport** » Sun Feb 15, 2015 10:04 am

Nope,
These are the original fitment...
They are best described as a tapered torx bolt... with external points... but the external splines are not parrallel... the taper off...
Ebay has lots for sale as a pump set of bolts....
But these things truly are a ridiculous concept...

X5-D-Sport · Post by **X5-D-Sport** » Mon Feb 16, 2015 11:07 am

What are these bolts called ? and what will undo them...

they are approx. 6mm thread, & made of Aluminium..

eBay item number: 350613360840

X5Sport · Post by **X5Sport** » Mon Feb 16, 2015 11:49 am

They are 8mm x 32mm Aluminium 'ASA' type E-Torx bolts. Single use only.

The ones you have listed are not recorded against the E53! As above the OEM ones are 7x38 Torx

Usually either a Torx spline key, or E-Torx socket/spanner should do the job. The 'E' stands for 'External'. It could also be a Torx-Plus but they do use the same tools.

Assuming it's an M8 thread then you need an E10 socket. M6/M7 is an E8 socket. For some reason the E tool numbers are not the same as the T tool number! T tools match the thread size. T tool is the 'normal' Torx bolt where you put a key in.

They came into being to allow faster assembly times as the tool can be slightly offset to tighten them.

Richard

X5-D-Sport · Post by **X5-D-Sport** » Mon Feb 16, 2015 5:42 pm

Excellent Richard... Thankyou...

A trip to Halfords it is later.... Wonder what the chances are of the Halfords Monkeys having these sockets ?

Regards
GB

X5Sport · Post by **X5Sport** » Mon Feb 16, 2015 6:29 pm

Should do. My Halfords pro socket set has them.

X5-D-Sport · Post by **X5-D-Sport** » Tue Feb 17, 2015 7:06 pm

So Richard,

What size do you think these Thermostat bolts actually are ?

X5Sport · Post by **X5Sport** » Tue Feb 17, 2015 10:51 pm

According to Realoem they should be Torx 7x38mm. Should therefore be a T40 or T50 key/spline bit. What have you found them to be? The OEM part number is: 11517789351.

Those look like the proper 'recessed' type Torx bolts, but your picture shows external Torx which makes me wonder if your pump has been changed and a different type used? The ones you describe should take an E8 socket.

Can you take a piccie of what is on the car?

Richard.

X5-D-Sport · Post by **X5-D-Sport** » Sat Feb 21, 2015 8:21 pm

Hi Richard,

These water pump bolts, are M7 x 28mm... They were a factory fitted E-Torx M7 bolt...

The E-Torx Sockets wizzed them off easily, and for the 1st time in months my Beastie has a proper temp reading now.... Hurrah...

Thanks for the help & suggestions.

X5Sport · Post by **X5Sport** » Sat Feb 21, 2015 9:37 pm

At least you solved it. Just HTH

Richard

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