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Originally Posted by Pete Burton
Nice idea. Bosch has incorporated this feature in the new glow plug relays. I think this is the kit that Phil is selling this month for 10% off. About $100 with 4 or 5 new glowplugs.
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That's for the OM617 engines only. There is no retrofit kit for any OM603's. You have to either do this mod, or build your own kit using factory afterglow parts from 1990-95 model OM603's. That's the preferable method but the cost is ~$250 for the relay, coolant temp sensor, and six afterglow-rated plugs. The 'poor mans' 603 mod with the 50C switch and relay gives almost the same effect for under ten bucks. Hard to beat that...!
