Water Pump Bolt

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Rjtenorman
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Water Pump Bolt

#1 Post by Rjtenorman » Tue Feb 23, 2021 12:16 pm

Hi all, I have recently acquired a cabriolet with a 1600 K series engine. It came with very little service history so I decided to change the cambelt. Everything has gone well untill I tried to remove the water pump! The bolt through the rear cambelt cover, beside the dipstick, has previously been rounded, probably by being over tightened. I have tried everything to get it out without success. My question is does this bolt only screw into the water pump or does it also screw into the engine casing. If I cut the head off the bolt will it then pull through, when I pull out the water pump. Any other suggestions welcome.
Thanks

Richard

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RoverRevival
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Re: Water Pump Bolt

#2 Post by RoverRevival » Tue Feb 23, 2021 12:17 pm

irwins bolt extractors or Torx sockets work well for us when that happens
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Rjtenorman
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Re: Water Pump Bolt

#3 Post by Rjtenorman » Tue Feb 23, 2021 12:32 pm

I borrowed a set of those from my local mechanic friend, but still wouldn't work. Couldn't get enough pressure on the socket to grip the bolt :sad

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Re: Water Pump Bolt

#4 Post by RoverRevival » Tue Feb 23, 2021 1:04 pm

the alternative is a file or multi tool or dremil to cut some new hex slots in. they will be small but there shouldn't be that much pressure on the bolt to put up much of a fight.
Pastor @ Rover Revival NFP Garage
220 Coupe turbo K785OAT
218 VVC Cabriolet R220OVR
Mercedes C270 diesel P80CJM
For Sale:
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216 ronda coupe
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Rjtenorman
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Re: Water Pump Bolt

#5 Post by Rjtenorman » Tue Feb 23, 2021 2:03 pm

I'll give that a go tomorrow or Thursday. Thanks

itcaptainslow
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Re: Water Pump Bolt

#6 Post by itcaptainslow » Tue Feb 23, 2021 2:25 pm

From memory the bolt you speak of attaches the timing cover to the water pump body-that’s it. Access can be improved immensely by removing the inlet manifold.
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Rjtenorman
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Re: Water Pump Bolt

#7 Post by Rjtenorman » Tue Feb 23, 2021 2:36 pm

Thanks for that. Hopefully I won't have to remove the inlet manifold, but I did think that would help a lot.

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Re: Water Pump Bolt

#8 Post by alviseven » Tue Feb 23, 2021 3:46 pm

weld a new nut to the head oversize so you can weld down the middle. Added bonus the head cracks the thread if its seized as well.
Assumes you have a welder but arc or MIG will do job.
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Rjtenorman
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Re: Water Pump Bolt

#9 Post by Rjtenorman » Tue Feb 23, 2021 5:27 pm

Good idea but not sure I trust my welding skills in such a confined space

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Re: Water Pump Bolt

#10 Post by itcaptainslow » Tue Feb 23, 2021 9:18 pm

Rjtenorman wrote:
Tue Feb 23, 2021 2:36 pm
Thanks for that. Hopefully I won't have to remove the inlet manifold, but I did think that would help a lot.
If you’re draining the coolant anyway (which you will be to replace the water pump) it really isn’t much additional work.
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Re: Water Pump Bolt

#11 Post by Rjtenorman » Tue Feb 23, 2021 9:41 pm

Thanks, coolant is already drained, I'll definitely look at the manifold over the next couple of days

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