The WORST time for a filter to bypass is during initial start up when there are potentially tons of metal shavings in the engine. On a flat-cam engine, I use assembly lube on the cam lobes, lifter bases, pushrod ends, and rocker arm tips. On a roller cam engine, I skip the lifters and lobes.
Pictures Below â. Hellgrammites are the vicious larvae of the Dobsonflies, some of the only trout stream insects which pose a biting threat to the angler. The pincers of the adult are even more frightening that the larva's, and they're aggressive enough to use them once in a while. This family's life cycle does not create good dry fly opportunities, but the larvae may be eaten by trout year-round. They are a secret told only by stomach samples of well-fed trout.
Ads. Dobsonfly, common name for any member of a family of often large, stout-bodied, net-winged aquatic insects. They are found nearly worldwide. Larvae are called hellgrammites or dobsons and are sometimes used as fishing bait. In midsummer, dobsonfly females lay eggs on leaves or rocks overhanging water, into which the larvae drop when hatched. The larvae are fierce predators, feeding on small aquatic animals; they are sometimes cannibalistic. The larvae remain in the water for up to three years, sometimes reaching a length of 5 cm (2 in).