Thread: Engine Guard temp alarm

Has anyone tried an Engine Guard or similar on their P38? I like the idea of not having to drill a hole into the coolant reservior as required for a low coolant alarm.

I have a Scan Guage to monitor what the coolant temp sensor 'sees', but I'd like something more as a back up.

I'm also wondering where on the block or head to bolt up such an alarm.

FWIW, I see up to 94 Deg C coolant temp in cooler months and at the moment (30 deg C-plus) a max of 97 in slow traffic, briefly peaking at 98 when stopped, idling. Then drops quickly to about 93 when moving at above 30km/h or so consistantly.

I'm about to flush the system, change all the hoses, theromstat and probably radiator (it has dried coolant showing on the bottom casing join, which may actually be from the overflow outlet when bleeding the system recently).

Read on here about water-wetter or waterless coolant being a waste of time so won't attempt to go there!

Originally Posted by 4X4V8

Has anyone tried an Engine Guard or similar on their P38? I like the idea of not having to drill a hole into the coolant reservior as required for a low coolant alarm.

I have a Scan Guage to monitor what the coolant temp sensor 'sees', but I'd like something more as a back up.

I'm also wondering where on the block or head to bolt up such an alarm.

FWIW, I see up to 94 Deg C coolant temp in cooler months and at the moment (30 deg C-plus) a max of 97 in slow traffic, briefly peaking at 98 when stopped, idling. Then drops quickly to about 93 when moving at above 30km/h or so consistantly.

I'm about to flush the system, change all the hoses, theromstat and probably radiator (it has dried coolant showing on the bottom casing join, which may actually be from the overflow outlet when bleeding the system recently).

Read on here about water-wetter or waterless coolant being a waste of time so won't attempt to go there!

Hi 4X4V8, I have fitted an Engine Guard to my P38, with two sensors. I fitted one sensor to the rear of each cylinder head. The main reason for fitting them there is if you look at an engine that has been overheated it is always the rear cylinders that are damaged first. I have also fitted a low coolant alarm, float sensor in the reservoir. If you are not keen on having a float switch in the reservoir, if you get a Aussie Desert Cooler full alloy radiator you could fit a Redarc low coolant alarm in the top tank. You just have to ask for an extra pad to be welded on the top tank when you order it. Then drill and tap it when you receive your new radiator.
Regards, Alan