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[philsteward]

All seems logical and does make sense, however if my engine has not been allowed to over heat, why would the head warp?  I am aware it is an aluminium head, and these things can happen, so is that it?  It just did?  Okay, but why is it so common on 2.2?

Is it that common, though?

I know the 4 pots tend to suffer HGF earlier than other engines but the wisdom on here is generally that it's not worth bothering to skim them as they rarely warp, so I actually think your experience is an exception, and therefore unlikely to repeat itself.

Also.. it's not just heat that can warp a head. Uneven clamping forces on the head due to incorrect torquing / removal of head bolts are another example. Can you be sure that your head was not subject to this earlier in its' life?

Interesting you say that, I emailed MarkCalib and he said not to get it skimmed as it is unusual for them to warp. Not wanting to open up a whole new can of worms but the car does run on LPG, and that causes engines to run warmer...you never know might all be connected.

Happy to agree that I may just be unlucky, and even though I have full service history with the vehicle and know the previous owner, cannot be sure something has not been done in the past.

Taking all this into account, I assume your thoughts are that the additional pump is not required?  However, if I can get one (found one on the pay for £30) and fit it using a relay and the feed from the fans, surely it will not do any harm?

[philsteward]

Temp sensor - this raises happily, and gives no odd readings, it does however only get to 85 and sit there, not 90 which is half way up the gauge, and I have recently fitted a thermostat so should be reading correctly. If the air con is not on, the temp does rise to 90 on the gauge and the fans kick in then it comes back down to 85 again.

Sounds like normal behaviour to me.

Well that is good to know...thanks!!

[Johnny English]

All seems logical and does make sense, however if my engine has not been allowed to over heat, why would the head warp?  I am aware it is an aluminium head, and these things can happen, so is that it?  It just did?  Okay, but why is it so common on 2.2?

Is it that common, though?

I know the 4 pots tend to suffer HGF earlier than other engines but the wisdom on here is generally that it's not worth bothering to skim them as they rarely warp, so I actually think your experience is an exception, and therefore unlikely to repeat itself.

Also.. it's not just heat that can warp a head. Uneven clamping forces on the head due to incorrect torquing / removal of head bolts are another example. Can you be sure that your head was not subject to this earlier in its' life?

Interesting you say that, I emailed MarkCalib and he said not to get it skimmed as it is unusual for them to warp. Not wanting to open up a whole new can of worms but the car does run on LPG, and that causes engines to run warmer...you never know might all be connected.

Happy to agree that I may just be unlucky, and even though I have full service history with the vehicle and know the previous owner, cannot be sure something has not been done in the past.

Taking all this into account, I assume your thoughts are that the additional pump is not required?  However, if I can get one (found one on the pay for £30) and fit it using a relay and the feed from the fans, surely it will not do any harm?

Surely won't is my guess. Anyway my one also didn't get secondary waterpump I use her without that with no issue !