| Re: [GMCnet] Removing Valve cover/ oil pan baffles [message #328694 is a reply to message #328669] |
Mon, 29 January 2018 18:59   |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma:
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Senior Member |
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Put a nozzle in your hi-pressure that shoots out a single straight stream and blast the hell out of the area between the pan and the
baffle.
Direct the flow from the "outside" towards the slot and see what comes out.
http://www.gmcmhphotos.com/photos/mechanical/p58370-oil-sump-pan-pickup.html
Then direct the flow the other way.
I reckon that any contamination that doesn't come out with the high pressure blast won't come out while the engine is running.
Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Bob Dunahugh
Sent: Monday, January 29, 2018 4:39 PM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Removing Valve cover/ oil pan baffles
The majority of oil pans that I've dealt with over a lot of years have been quit clean. This has been due to the turbulence
created by the rotating mass. The build up of material on the very bottom comes out well with solvents. Lots of lead build up from
the days of leaded fuels. Pans with rust inside, or pans from engines that had heavy crankshaft damage. They've been unusable to
me. BUT. Now I need to figure out how to get this oil pan acceptable to use. (As this nice 403 came out of a running 78 Olds wagon.
The pans been laying around. ) I need to pull the baffle. Clean. Then braze back in. The lack of extreme cleaning is the reason for
rebuilt engine failure. Bob Dunahugh
I'm not happy about not being able to say that the backside of these baffles are 100% PERFECTLY clean for the rebuild of this
403. This 403 oil pan has some rust on the inside. I've just never run into this before. If there is contamination inside the
baffles. There's just no way to get it out using normal block cleaning methods. So has anyone removed these baffles for cleaning?
Then reinstall. As I've said. I get real anal over cleanliness on engine assembly. When I assemble an engine. My shop that I keep
our GMC in. I turn on it's air filtration system 12 hours before assembly. Then do all assembly with paper coveralls, and on white
paper. I've never lost a bottom end of any race engines/ driver I've built. This cleanliness just pays off. Bob Dnahugh
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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