I have made such plugs but I make the magnet an interference fit and also apply JB Weld. Never had a problem.
Regards
Declan
Magnetic Sump Plug
Forum rules
By using this site, you agree to our rules. Please see: Terms of Use
By using this site, you agree to our rules. Please see: Terms of Use
-
Declan_Burns
- Minor Legend
- Posts: 1962
- Joined: Wed Apr 18, 2007 7:32 am
- Location: Düsseldorf, Germany
- MMOC Member: No
Re: Magnetic Sump Plug
Regards
Declan
- svenedin
- Minor Legend
- Posts: 4798
- Joined: Fri Aug 29, 2014 9:27 am
- Location: Surrey
- MMOC Member: Yes
Re: Magnetic Sump Plug
Nice to see you back on here Declan! Long time.
Stephen
Stephen
1969 1098cc Convertible “Xavier” which I have owned since 1989.
Stephen
Stephen
- geoberni
- Minor Maniac
- Posts: 5246
- Joined: Fri Aug 04, 2017 11:19 am
- Location: North Leicestershire
- MMOC Member: Yes
Re: Magnetic Sump Plug
On the subject of temperatures, I drove back home from East Kirkby Airshow yesterday, near 50 miles of A road driving with a couple of miles of 30 limit to get to home.
I immediately sampled engine temperatures with my infrared thermometer, having switched off as soon as I got home so no idling, just about 60 seconds of standing. When the sump had no airflow past it and hot oil from around the engine had a chance to drop down to the sump.
Thermostat Housing - 92 C
Engine Temp Sensor area of the Head - 88 C
Top of the Radiator (at water level, not the air gap) 85 C
Sump - 80 C
So that bears out the numbers Mike has mentioned.
I immediately sampled engine temperatures with my infrared thermometer, having switched off as soon as I got home so no idling, just about 60 seconds of standing. When the sump had no airflow past it and hot oil from around the engine had a chance to drop down to the sump.
Thermostat Housing - 92 C
Engine Temp Sensor area of the Head - 88 C
Top of the Radiator (at water level, not the air gap) 85 C
Sump - 80 C
So that bears out the numbers Mike has mentioned.
Basil the 1955 series II


Re: Magnetic Sump Plug
My Traveller is having a recon engine fitted as soon as I get it home I ll put a few neodymium magnets on it. That should keep any particles on it at first oil change and subsequent ones.
-
philthehill
- Minor Maniac
- Posts: 12110
- Joined: Thu Jul 19, 2012 12:05 pm
- Location: Hampshire
- MMOC Member: Yes
Re: Magnetic Sump Plug
Put the magnets on the outside of the filter bowl so as to keep any ferrous particles inside the filter housing which can then be washed out at the next filter change.
-
kevin s
- Minor Legend
- Posts: 1471
- Joined: Tue Mar 26, 2013 8:20 pm
- Location: Chelmsford, essex
- MMOC Member: No
Re: Magnetic Sump Plug
you can slso drill a blind hole in the outside of the plug and glue the magnet in.
-
Sleeper
- Minor Legend
- Posts: 1325
- Joined: Tue Nov 08, 2016 3:18 pm
- Location: Manchester ( Damp and Miserable ) and that's just the wife...
- MMOC Member: Yes
Re: Magnetic Sump Plug
So..philthehill wrote: ↑Tue Aug 18, 2026 4:54 pm Put the magnets on the outside of the filter bowl so as to keep any ferrous particles inside the filter housing which can then be washed out at the next filter change.
inside ?
John ;-)