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Engine Specific Info and Questions => IDI Engine => Topic started by: 92EcoDiesel Jetta on August 09, 2011, 04:17:12 pm
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After a head gasket job, should I pull the vacuum pump so I can manually spin the oil pump to get oil circulated through the engine before starting it? I undid the 13 mm bolt and clamp but the vacumm pump seems to be stuck in there pretty good due to corrosion. Should I put a slide hammer on it and tap it out?
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With just a head gasket done, there should be no issue about oil . To be sure pour a bunch all over the cam and lifters. It's not your breaking in a rebuilt engine.. More important is to make sure you bleed all the air out of the cooling system once it's running
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^ good advice.
I still like seeing the oil up top. You never know when brain fade sets in and you put the top or OBEN side down and no oil comes up. I haven't done it yet, but I am sure I will sometime.
The vac pump should come out if you have that clamp off and twist it with a pipe wrench. Be prepared to put a new oring in it if it was real bad.
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If it is that rusted in there CLEAN IT very well before removing it or you will get a bunch of junk in your engine. Lightly tapping it with a hammer side to side will get it out of there as well.
Personally I would not worry about it unless it took you over 2 months to do the headgasket job, but even then...
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Yeah I wire brushed it then sprayed it with Brake clean then penetrating oil soaking overnight.
Another reason I want to remove it is to paint it with POR15 along with the rusty injector hardlines.
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I wouldn't worry about oil pressure that much due to you'll be cranking it trying to frime the injectors. It'll get oil there before fuel.
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Not that it would hurt to do so, feel free to do it.
I only worry about it when I do rebuilds, but I use enough assembly lube to kill a small horse.
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grab that vacuum pump like it owes you money, and start twisting and tugging. it will come out..
like was stated, clean around it before you pull it.
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I took a slide hammer, hooked the lip of the top plate and it moved. I didn't pull it out all the way (just 1/8 inch) so I can clean it up more then put it back till I'm ready to paint it.