ENGINE PRE HEATER

I am thinking of fitting an engine pre-heater before the weather turns really cold in my TD5 but I don't want to go through the process of removing a core plug to fit a block heater. From what I understand the heated pad type ones that you fit to your oil sump are pretty ineffective but I have seen a couple of YouTube examples where the ones you fit into the coolant piping which feeds the vehicles heater core seem to be ok, there are loads of similar ones on eBay
Anyone had any experience of this and if it worked we did you fit it into the water piping? I saw one post on this site where it was going to be fitted in the pipe between the expansion tank and the engine but I'm not sure this would be the best place – but perhaps it is??
Type of heater I am thinking about picture below and all responses very welcome

The heatpad for the sump Idea was to warm up the oil for a few hours. Mostly it's debatable since UK weather is short lived. Whether the use of a heater radiator makes much difference than just sticking in a truck fan heater. Webasto air heater works off the fuel line I think

You want a coolant heater made by webasto or eberspacher, both are pretty expensive.
You can make your own kit using second hand parts, the discovery 3/4 has a webasto block heater, add that to an oval webasto timer and you are halfway there.

I fitted a Kenlowe pre-heater to one of my Defenders that worked brilliantly. Was mains powered with a slave lead just plugged into an outside socket. It was on a timer and would pre-heat the engine to working temperature and then turn on the cab heater to pre-heat the cab too. Was plumbed into the heater pipes.

Is this any good to you https://www.landyzone.co.uk/land-rover/cheap-chinese-diesel-heater.337749/

backinblack said:

Is this any good to you https://www.landyzone.co.uk/land-rover/cheap-chinese-diesel-heater.337749/

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They are cab heaters not engine pre-heaters.

Interceptorxj said:

They are cab heaters not engine pre-heaters.

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I know but it's an option. Maybe the OP hasn't thought of them.

Interceptorxj said:

I fitted a Kenlowe pre-heater to one of my Defenders that worked brilliantly. Was mains powered with a slave lead just plugged into an outside socket. It was on a timer and would pre-heat the engine to working temperature and then turn on the cab heater to pre-heat the cab too. Was plumbed into the heater pipes.

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Thanks for that, I've looked them up on the net and there are some very positive old reviews on their but it appears the product is no longer available – shame