Quote:
Originally Posted by Boxstard
Yeah that’s pretty basic…. For me cracking can be repaired and may not warrant automatic replacement, if you catch it early. Body crack can be filled with epoxy, and tube can be insulated with electric tape. One of mine had tube split and taping it up works fine.
I do have a multimeter, but just wondering how to tell actual degradation, instead of just continuity of the coil. Variation in reading within the spec. may come from manufacturing tolerance, instead of aging. If the coils with resistance within the spec. can still produce weak spark, then the check is not effective and I wonder what else can be checked.
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When you measure the resistance to be less than 0.7 ohms, that is just the primary coil and my guess would be that it is the secondary which is more important. You can measure the secondary resistance, but a better measurement would be the insultation resistance, for which I haven't seen any figures.
If the insulation has cracked, unless you get all of the moisture out before it is sealed with epoxy you will still compromise the insulation resistance and therefore might end up with a weak spark. I would only do this as a short term fix until new coils can be obtained.
It took me 3 hours to change all six coils/plugs and coils were £31 each in the UK, I doubt it is really worth the effort of removing a coil, drying it out, filling with epoxy and re-fitting, well not in our current autumn climate of cold temperatures and rain.
If you were a little closer, you could have 6 Beru coils, all with at least one crack, but the postage would be more than they are worth.
PS anyone in the UK is welcome to them if they pay the cost of posting from Northumberland.