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Disassembly of a 69 Z/28 DZ Three Oh Blew Engine
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12-16-2014, 09:43 PM
SuperNovaSS
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Re: Disassembly of a 69 Z/28 DZ Three Oh Blew Engine
Here is the oil pan, one side has multiple dents from something trying to escape and there is only one spot on the other side:
While the little oil that is the pan is draining, let's check out the top end:
Hmmmmm, where did those pushrods disappear to? Let's check under the intake:
No, I did not remove that lifter. If that is not strange enough, where are the 2 missing lifters????
Oh, there is one. I wonder how that got down there?
The oil is still draining. We might as well pull the heads. I want to see if they are 2.02/1.60 valves anyway.
Looks dirty but not bad at first glance. I don't see any stampings on the pistons. Could this possibly be standard bore?
One piston looks to be sitting a bit high and has a nick in it.
Let's check the head on that cylinder:
The good news is the heads are factory high performance units with 2.02/1.60 valves and no modifications like porting or screw in studs. The bad new is one intake valve is bent from that piston. Not a big deal.
OK, the oil has stopped draining out of the pan. We know there is carnage down there. Want to check it out? I do.
Hey, there is the missing pushrod! Amazingly, it is still straight!
I don't think we can straighten the windage tray. But we did find the other lifter. Notice anything missing from the crankshaft?
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