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 Post subject: Water Pump Bolts - WARNING
PostPosted: Mon Sep 16, 2013 10:59 am 
Haha, I just built a W24 Octo-Turbo, now what?!
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Joined: Wed Jun 14, 2006 4:19 pm
Posts: 3131
Location: Lethbridge, AB
This is a public service announcement. Don't tighten the water pump bolts to the torque spec listed in the Haynes manual for the following engines (B21,B23,B230 - basically all slanted redblocks). The Haynes has listed the torque spec as 16 ft/lbs. The fastener is (or should be) an M6 coarse thread flange head bolt (with flange nuts on the two studs). These fasteners are 8.8 grade and have a torque rating of 7 ft/lbs (dry). I managed to snap a number over the weekend trying to hit the torque spec that was listed.

Also, the bolts that are shipped with the IPD GMB water pump do not have a grade specification. Throw them away and replace with the proper bolts. If you can't find a flange head bolt (and you won't find one around usually unless you're lucky (sometimes I've found them at Canadian Tire of all places). Then replace with a standard bolt and a hardened washer. Standard washers deform as the pump casting has oversized holes.

This is the end of my public service announcement.

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 Post subject: Re: Water Pump Bolts - WARNING
PostPosted: Mon Sep 16, 2013 12:35 pm 
Haha, I just built a W24 Octo-Turbo, now what?!
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Joined: Wed Dec 21, 2005 8:40 pm
Posts: 3492
Location: Calgary, Ab
And we thank you, sir.


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 Post subject: Re: Water Pump Bolts - WARNING
PostPosted: Mon Sep 16, 2013 9:48 pm 
Haha, I just built a W24 Octo-Turbo, now what?!
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Joined: Thu Dec 29, 2005 12:29 am
Posts: 1790
Location: Eating tofu and legumes in my hippie shack
Indeed.

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 Post subject: Re: Water Pump Bolts - WARNING
PostPosted: Tue Sep 17, 2013 10:38 am 
First volvo in outer space
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Joined: Fri Dec 14, 2007 1:46 pm
Posts: 1648
Location: East L.A.
+3.

I looked in the Bentley Bible and found no mention of torque value at all??!! The 700/900 FAQ`s on BB lists 8-10 lb ft so at least that`s close.

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