Hi,

To my knowledge the Glow Plugs on my car have never been replaced. The car starts fine to about 10F without a block heater, so Id have to assume they are working well, but reading all the posts in the archive about stuck glow plugs and troubles if the head breaks off, etc., I worry a bit, and think that I will replace all 5 (PEH isnt here, so its OK )

I will be doing diesel purge for the first time ever in a week or two, so I figure after then is an optimal time to do it.

But, to ensure an easy job, I want to start using penetrating oil on the outside.

My question is, is that safe? Will the residues from the penetrating oil cause more harm than good in the long run? Or is it unsafe to have that stuff slowly burning off as I use the car?

Its either spray them every few days and keep using the car (the oil will burn off when I run it, but at least itll work in when it sits), or if thats too risky, Ill just do it the last day to two.

Any comments?

JMH

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Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
2008 ML320 CDI (199k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)