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Z question 280 motor rebuild question

To: <datsun-roadsters@autox.team.net>
Subject: Z question 280 motor rebuild question
From: "Eric Wittinger" <ewittinger@pixelworks.com>
Date: Tue, 11 Feb 2003 17:11:13 -0800
HI list, sorry for a non roadster question, but I am unsure what to make of the 
problem I am having.
see below.

Thanks

> Here is the question, simple I hope. I am rebuilding a 280 motor, I have 
>everything together fine so far. Head on and tourqed, timing chain timing 
>marks all line up fine for TDC. chain installed, front timing cover installed. 
>Front crank pulley on...
> 
> Now the problem I have run into: When putting in the dizzy drive shaft and 
>gear and oil pump things don't seem to go together as nicely as expected.
> 
> I can line up the dizzy drive correctly no problem. the problem is really 
>putting on the oil pump. I can get it to slide up fit onto the keyed shaft but 
>it will not slide up and sit flush with the timing chain cover. There is about 
>1/4" gap. I can run in the bolts and tighten them up and it will pull the oil 
>pump up tight, but it them seems that the engine will not turn, ( trying to 
>turning from the cam) If I remove the oil pump I can turn the engine fine from 
>the cam.
> 
> Any ideas as to what is happening? I can only guess that the oil pump is 
>pressing against the drive gear on the dizzy drive shaft.
> 
> What I have tried: I put a little grease on the top of the oil pump shaft 
>that the drive gear fits in to see if it is hitting the drive gear before I 
>tighten the bolts down, and it is not. When the bolts are tightened down the 
>grease spot is smeared, suggesting that it is touching or really close.
> 
> Help.....
> 
> Eric

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