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Old 11-19-2016, 04:48 PM   #153
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Join Date: Nov 2016
Location: OR
Posts: 1,992
Vehicle: '90 D21 4cyl 5spd 2wd
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There is only one half-moon plug on the back of the valve cover. The plug will drop into its hole (there are a couple of lines machined to act as a guide for the plug) and seal, even though it looks like it needs a second plug. I think that hole is there because on FWD ka24 vehicles (stanza, axxess) the distributor runs off the camshaft rather than the gear on the crank snout. KA24DE engines use two plugs per side, if memory serves.
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