I found out that glow plugs can be affected by rough handling, i.e. persistent dropping, I never gave that much thought until I talked to an engine design engineer about it.


I have had a couple of plugs that never worked from start and did get replacements. I guess it's possible to destroy them in/after manufacture.

FLASH:

Just found this: read down a few posts:

http://www.thedieselstop.com/forums/f149/glow-plug-destroys-engine-271501/

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Strelnik
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1950 170SD
1951 Citroen 11BN
1953 Citroen 11BNF limo
1953 220a project
1959 180D
1960 190D
1960 Borgward Isabella TS 2dr
1983 240D daily driver
1983 380SL
1990 350SDL daily driver alt
3 x Citroen DS21M, down from 5
3 x Citroen 2CV, down from 6