| Re: [GMCnet] Restart a 403 [message #324604 is a reply to message #324603] |
Wed, 04 October 2017 09:52   |
GMC.LES
Messages: 505
Registered: April 2014
Karma:
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Senior Member |
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Pulling plugs and turning crank by hand for a min of 2 full turns is highly recommended. I've had engines that had stuck valves from sitting. The engine turned over easily then thunk, it stopped. Turning by hand usually won't damage anything, doing it with a starter will bend or break parts.
On one engine with a stuck valve, i freed it up using lots of Kroil in each cylinder through the plug holes. After it had sat a while, I then bumped the stuck valve lightly by rocking the crank. I didn't know exactly which valve was stuck and wasn't in a situation to pull the engine apart at that moment. The kroil vapor must have been sufficient because the valve loosened up the next day. When I started the engine, I used a 10:1 oil mix for the first gallon, and reduced the ratio by half with each additional gallon. Lots of initial smoke, but the engine loosened right up and ran smoothly.
With a stuck valve that you loosen up, I wouldn't consider that engine being a reliable runner. The stuck valve is likely due to rust which will destroy the guides like lapping compound. I'd pull the heads for a refresh before putting it into service.
Les Burt
Montreal
'75 Eleganza 26'
> On Oct 4, 2017, at 9:59 AM, Steve Southworth wrote:
>
> Chris Tyler wrote on Wed, 04 October 2017 07:51
>> Someone who knows olds engines specifically should chime in, but tI have encountered engines that wont develop oil psi without the distributor in
>> place so you need a specific tool or an old distibutoe with the gears ground off.
>>
>> I like to use ATF in the cylinders as I think it penetrates better.
>>
>> Regardong the belts and hoses, the smart play is to replace them now rather than gamble and end up doing it on the side of the road.
>
>
> Olds will not build oil pressure with Dist out. If the Dist that drives an oil pump comes out with a gear on the end there will be no oil pressure
> with the dizzy out.
>
> The idea of spinning the pump first is to make sure oil gets everywhere it can under pressure. I run mine until the drill motor gets too warm for
> comfort.
> --
> Steve Southworth
> 1974 Glacier TZE064V100150 (for workin on)
> 1975 Transmode TZE365V100394 (parts & spares)
> Palmyra WI
>
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