3.9L timing chain tensioner on '89 LA 360: Drill for far-left oil hole or not?
I've found conflicting information in regards to this oil feed hole via a forum/Google search, mainly as most factory blocks appear to have sealed welch plugs installed. Not the case here.
My '89 LA 360 (360-3, roller cam) has a factory (this motor has never been apart until now) pinhole of an oil feed coming through the left side, and a hole to match on the camshaft thrust plate:
None of the bolts have a similar pinhole drilling through the center, so I assume this is Chrysler's supplement the timing chain oiling tab and whatever happens to dribble out of the camshaft thrust bearing.
And here's the 3.9 thrust plate/tensioner:
Unlike the original, this plate does not have that area drilled. So my question is to those who've worked with this combination before: Drill the new tensioner/thrust plate, or leave it capped?
-Kurt
I've found conflicting information in regards to this oil feed hole via a forum/Google search, mainly as most factory blocks appear to have sealed welch plugs installed. Not the case here.
My '89 LA 360 (360-3, roller cam) has a factory (this motor has never been apart until now) pinhole of an oil feed coming through the left side, and a hole to match on the camshaft thrust plate:
None of the bolts have a similar pinhole drilling through the center, so I assume this is Chrysler's supplement the timing chain oiling tab and whatever happens to dribble out of the camshaft thrust bearing.
And here's the 3.9 thrust plate/tensioner:
Unlike the original, this plate does not have that area drilled. So my question is to those who've worked with this combination before: Drill the new tensioner/thrust plate, or leave it capped?
-Kurt