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Dog-faced pony soldier
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Has anyone replaced the entire front oil pump ass'y?
I have oil seeping out of the front crank seal which has been replaced along with the oil pump drive sleeve two or three times now. Unfortunately the problem hasn't gone away and I'm getting sick and tired of having to disassemble all the t-belts and other junk to get at it, clean the entire engine, etc. only to have it pee oil again. I suspect that there's a score or deformity or other problem with the race in which the front seal sits (and yes, I've tried it with and without sealant also). This time around I'm considering replacing the entire front oil pump assembly (I've got a couple of spares) along with the seals and drive sleeve.
Has anyone done this? I'll check Clarks but I'm just wondering how exhaustive of a job it is. Other than this, my car is 100% leak-free, making it all the more annoying. Unacceptable! TIA.
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A car, a 911, a motorbike and a few surfboards Black Cars Matter |
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08-17-2010, 03:00 AM
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Registered
Join Date: Jul 2004
Location: Upstate New York
Posts: 3,264
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Big job. You have to drop the oil pan.
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Good luck, George Beuselinck |
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08-17-2010, 03:25 AM
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Az 944 Spec Director
Join Date: Feb 2010
Location: Phx, Az
Posts: 84
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Before you change the pump install the seal with goop around it. The same stuff you use to seal the pump to the block. Loctite 574 or something like that. I just saw a shop around here installing seals like this to account of minor imperfections in the race for the seal.
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Joe P. 88 944 Turbo S - 100% Stock 84 - 944 Spec #94 Red/White Arizona Region 944Spec Director Az 944 Spec Champion 02/03, 2006 - 2nd Az Region 944 Spec 03,04,08,09 4th - 2009 NASA Natls - Fastest 944 spec lap at Miller Natls - 2.19.282 (Sat Warm-up) |
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08-17-2010, 04:58 AM
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Proprietoristicly Refined
Join Date: Jul 2001
Location: ~Carefree Highway~
Posts: 5,833
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Quote:
In front of the oil pump sleeve is the "O" ring. If you tighten the Alt/AC belt excessively it will burn out the seal. GL John
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1988 924S, 85,750K ..+ 1987 924S, 154K DD (+15K est. bad odo) |
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08-17-2010, 05:18 AM
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Are you sure it is not coming from soewhere else? I had the same issue on the S2 and came to find out it was from the oil pan gasket.
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1993 964 C2 still makes me smile Retired and work as needed as a pain in the **s. |
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08-17-2010, 08:57 AM
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Parrothead member
Join Date: Jul 2003
Location: Monmouth county, NJ USA
Posts: 13,846
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I was knocked on my a$$ when I seen how much a new oil pump cost for our cars. $700+!!
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Vinny Red '86 944, 05 Ford Super Duty Dually '02 Ram 3500 Diesel 4x4 Dually, '07Jeep Wrangler '62 Mercury Meteor '90 Harley 1200 XL "Live your Life in such a way that the Westboro Baptist Church will want to picket your funeral." |
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08-17-2010, 10:52 AM
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Join Date: Mar 2008
Location: Chicagoland
Posts: 2,695
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cause nobody ever buys a new oil pump heh.
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08-17-2010, 10:59 AM
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Az 944 Spec Director
Join Date: Feb 2010
Location: Phx, Az
Posts: 84
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Quote:
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Joe P. 88 944 Turbo S - 100% Stock 84 - 944 Spec #94 Red/White Arizona Region 944Spec Director Az 944 Spec Champion 02/03, 2006 - 2nd Az Region 944 Spec 03,04,08,09 4th - 2009 NASA Natls - Fastest 944 spec lap at Miller Natls - 2.19.282 (Sat Warm-up) |
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08-17-2010, 12:45 PM
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i have 230k on the oil pump and it still pumps 4.5 bars. It is always the OPRV that gives me oil pressure issues.
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1993 964 C2 still makes me smile Retired and work as needed as a pain in the **s. |
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08-17-2010, 01:25 PM
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Dog-faced pony soldier
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Hmmf. Well, I'll try replacing it again this time with locktite in the race and see what happens.
I'm building a new engine anyway (2.8 with turbo and other go-fast goodies) but I'd like this one to be leak-free until I get it done.
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A car, a 911, a motorbike and a few surfboards Black Cars Matter |
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08-19-2010, 07:25 PM
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It could also be leaking between the block and the pump housing. I have seen several that are leaking at this spot. This seal is just orange loctite and my theory is that over 25 years of heat cycles the sealant gives up. The only real way to be sure is to put the belts on without the covers and run the engine until the leak shows up.
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Keith Belcher '87 951 nautic/cancan |
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08-20-2010, 04:25 AM
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porscha
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08-20-2010, 06:01 AM
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911
1987 Porsche 951
