My Google turns up a handful of bad reviews for Monark glow plugs; nearly as many reviewers state that they haven't had any problems with them, and not too many of the comments are more recent than 3 years ago. My own experience puts me in the latter group. I bought four Monarks last year for my '83, and they still work fine.

I think that if you have an opinion, then it's OK to state your opinion-but if you have no firsthand experience to convey, then you do nobody any favors by overstating your opinion.

Perhaps it's because I have a low-mileage engine and it doesn't get very cold here, but the upgrade on my '79 really didn't make much difference. I do get faster starts with the pencil plugs, but I never had starting problems to begin with. I went with the 80035's because they were only a couple of bucks more than straight replacements. If the loop plugs are in good shape, and you have clean pre-chambers, then they will certainly get the car going. They just take a minute longer.

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'79 240D