In addition to candles, this lubricant is suitable for other threaded joints that heat up during operation.
These include glow plugs in diesel engines, fuel injectors, exhaust system gaskets, and related fittings.
But does this lubricant live up to the hype? And what if a proper lubricant isn’t available?
Expert opinion
Alexey Revin expert “Behind the wheel”
– Lubricant used on the threaded portion of spark plugs indeed helps when unscrewing them at the next service. The key is to use a high-temperature variant intended for such connections. It can be based on copper or ceramic materials, with the ceramic option costing considerably more.
Online guidance sometimes suggests graphite grease on plug threads. This should be avoided because it is not sufficiently heat resistant, and the base oil residue may ignite.
However, if a specialized lubricant isn’t on hand while replacing plugs, temporary, improvised solutions can suffice. A simple pencil with soft graphite can be used. Lightly rub the lead on the wire and reassemble the plug without forcing it. In practice, the plug can be removed again after several years and many miles with noticeably less risk of oil-base burning, since the graphite contains less oil content.
Keep in mind
For installing injectors and glow plugs in diesel engine cylinder heads, there is no substitute for a dedicated non-stick lubricant. And it is wise not to skimp on this step, as a difficult disassembly of these components can lead to removing the cylinder head.
Photo: Depositphotos and driving [Photo credits: Depositphotos]
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