Just replaced my glow plugs in my '84 300SD. How often should I expect to do this? Is it a normal service requirement?

Thanks in advance for an answer to a simple question.

__________________
rdsw
Salem, NH
1984 300SD, 260k miles and counting

I just replaced mine after about 6 years. Big difference. I started the other day at -6F, and I don't have a block heater. I would say every couple of years. It seems that they can test ok, which my old ones did, but the tips get funky. Just my 2cents....

__________________
85 300TDT 456,000 orig. miles

This is kind of like asking "how long is a rope?" There is just no way to know. I've had pin type glow plugs last 3 or 4 years, and I've had to replace them as early as about one year.

They used to be about $3 each. With the prices they get for them now, it is a concern.

Good luck,