[ROVERNET - UK] P6B oil pump troubles

John Burkhard burkhaj at earthlink.net
Wed May 17 17:51:48 BST 2006

I think the small block Chevy tool will work.
----- Original Message ----- 
From: "Glen Wilson" <glenwilson at cavtel.net>
To: <rovernet at lyris.ccdata.com>
Sent: Tuesday, May 16, 2006 6:45 AM
Subject: Re: [ROVERNET - UK] P6B oil pump troubles

> On Tuesday 16 May 2006 08:12, Brooks wrote:
>> Question.....
>>  by using the drill method are you not turning the engine over as well 
>> ??
>> do you need to remove the plugs to alow the engine to turn easier ?
>>  What is needed to remove the front of the oil pump...is it much of a 
>> job
>> to do ?
>> Thanks for your advice..
> Dennis,
> If I have it right in my head, there is a gear that drives the 
> distributor
> shaft from the side, and the bottom of the distributor shaft in turn 
> drives
> the oil pump. The "screwdriver" tool goes in right past the gear that 
> drives
> the distributor shaft and drives the oil pump, bypassing the distributor
> drive gear. The engine does not turn over at all, but the oil is pumped
> through the passageways.
> There is a coupling at the end of the drive shaft that fits into the oil 
> pump
> drive shaft. The coupling differs between the SD1 engine and earlier 
> engines.
> It's basically a "male" versus "female" difference. If you were to swap a
> distributor from an SD1 to a 3500S, you would have to drive a little pin 
> out
> and change the little coupling. Very simple procedure.
> I ground the plastic handle off of a medium size Sears screwdriver so 
> that all
> that was left was the metal "tang" of the tool. I simply put the 
> screwdriver
> into the chuck of a 1/2-inch drive electric drill and ran it at the max 
> the
> drill put out (which I think was 550 rpm) and it was enough to get the 
> oil
> pressure up into the bottom of the normal range of the oil pressure gauge 
> in
> the instrument panel. The gauge works if the key is in the "on" position. 
> It
> used to take about five seconds for the oil pressure to come up. I 
> believe
> the screwdriver blade fits into the oil pump drive gear on the older 
> 3500S
> engine whereas the SD1 would require something that would engage
> the "screwdriver tip/tab/thingie" that sticks up out of the SD1 oil pump
> drive gear. For the 3500S, I attached a piece of hose over the end of the
> screwdriver tip to keep it in the slot as I ran the drill.
> I think that later model GM V8s had a similar arrangement and that you 
> can buy
> prefab tools at speed shops to do the function of the tool I made.
> As usual, I'm sure Kent can provide any specific info you need on this. 
> He's a
> crafty bugger!
> Glen
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