greg huff Posted July 14, 2011 Report Share Posted July 14, 2011 Hi guys, I am new around here, I was searching for some online help when I stumbled across this board. Looks pretty cool. I am trying to change out the water pump on my '87 Coupe DeVille and just need some advise. It looks to me that I have to go underneith and pull the power steering pump first. I unbolted it last night and found that there isn't enough room to remove it. Am I missing something? Is there an easier way of attacking it from the top? Any help would be greatly appreciated, Greg. Link to comment Share on other sites More sharing options...
CoupeDTS Posted July 14, 2011 Report Share Posted July 14, 2011 I worked at an auto parts store where we sold alot of this one tool that was used to remove water pumps or water pump pulleys on cadillacs. I wonder if thats something on your engine you will need. Someone should shed some light. * 1966 Deville Convertible * 2007 Escalade ESV Black on Black * 1996 Fleetwood Brougham Black on Black V4P -Gone* 1983 Coupe Deville Street/Show Lowrider -Gone* 1970 Calais 4dr Hardtop GONE* 2000 Deville DTS - Silver with Black Leather and SE grille GONE* 1999 Seville STS - Pearl Red GONE Link to comment Share on other sites More sharing options...
Ranger Posted July 15, 2011 Report Share Posted July 15, 2011 I suspect you may be talking about the Northstar water pump tool (socket). If so, that's not applicable on Greg's engine. Link to comment Share on other sites More sharing options...
CoupeDTS Posted July 15, 2011 Report Share Posted July 15, 2011 I suspect you may be talking about the Northstar water pump tool (socket). If so, that's not applicable on Greg's engine. Must be it. Alot of shops needed it and this was 10 years ago so thought maybe it was for pre northstar. * 1966 Deville Convertible * 2007 Escalade ESV Black on Black * 1996 Fleetwood Brougham Black on Black V4P -Gone* 1983 Coupe Deville Street/Show Lowrider -Gone* 1970 Calais 4dr Hardtop GONE* 2000 Deville DTS - Silver with Black Leather and SE grille GONE* 1999 Seville STS - Pearl Red GONE Link to comment Share on other sites More sharing options...
greg huff Posted July 15, 2011 Author Report Share Posted July 15, 2011 I don't know if it's North Star. The air cleaner says HT 4100 V8. What I thought was the power steering pump turns out to be the air compressor for the A/C. Good news, I was able to pull it. My problem now is pulling out the water pump itself. I've completely unbolted it and it won't budge. PLEASE forgive my ignorance I am new in the Caddy world. I've worked on Chevy V8's, Volkswagons and just about any thing that could go wrong on these cars. I am not a newby and turning wrench...this car has me completly up in arms though. CoupeDTS...Nice profile pic. That rocks, 520 tires wires & lifted....my kind of car. Link to comment Share on other sites More sharing options...
KHE Posted July 15, 2011 Report Share Posted July 15, 2011 The tool you may need is a power steering pulley puller to remove the power steering pump pulley if that is in the way of the water pump. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
Ranger Posted July 16, 2011 Report Share Posted July 16, 2011 I don't know if it's North Star. The air cleaner says HT 4100 V8. The Northstar is a 4.6 and the 4.1 (4100) is a far cry from a Northstar. The production order was 4.1 (HT4100) > 4.5 > 4.9 > 4.6 (Northstar) Link to comment Share on other sites More sharing options...
adallak Posted July 16, 2011 Report Share Posted July 16, 2011 I don't know if it's North Star. The air cleaner says HT 4100 V8. The Northstar is a 4.6 and the 4.1 (4100) is a far cry from a Northstar. The production order was 4.1 (HT4100) > 4.5 > 4.9 > 4.6 (Northstar) Exactly, Ranger. The 4100 is probably much closer to 4.5 which is like 4.9. I just checked rockauto.com. It looks like the same water pump I had on my 4.9. I have a new one laying around. What is exactly the problem? As I remember some bolts, studs, nuts were difficult to remove, the rest was straight forward unless someone applied some adhesives to the gasket. BBF has replaced his 4.9 water pump in the parking lot of a Hilton! The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
Ranger Posted July 17, 2011 Report Share Posted July 17, 2011 I can't be of much help. I never had to change the WP on my 4.1's or 4.9. Link to comment Share on other sites More sharing options...
Texas Jim Posted July 17, 2011 Report Share Posted July 17, 2011 When I changed the water pump on my 1984 Fleetwood with the 4100... I remember it being STUCK and it was pretty hard to get off. Link to comment Share on other sites More sharing options...
lyev Posted July 21, 2011 Report Share Posted July 21, 2011 I have a 1988 Deville with a 4.5L engine. Water pump on yours is exactly the same as mine. Just replaced my water pump a while back. There are 2 Torx screws in the center, I think one is hidden under the pulley. If you didnt remove the pulley first you may not have seen that screw. So one screw may still be attached and you just couldnt see it. You need to take the pulley off to get to the one screw I think. And you will remove the water pump from the top. Link to comment Share on other sites More sharing options...
adallak Posted July 23, 2011 Report Share Posted July 23, 2011 I have a 1988 Deville with a 4.5L engine. Water pump on yours is exactly the same as mine. Just replaced my water pump a while back. There are 2 Torx screws in the center, I think one is hidden under the pulley. If you didnt remove the pulley first you may not have seen that screw. So one screw may still be attached and you just couldnt see it. You need to take the pulley off to get to the one screw I think. And you will remove the water pump from the top. Too keep the pulley in place while unscrewing it, put the serpentine belt back. The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
lyev Posted July 23, 2011 Report Share Posted July 23, 2011 Youre right, forgot to say that! But it was suprisingly easy when I did this job a few months back. And I was looking at my old water pump and I think 2 screw holes may be covered by the pulley. I have a 1988 Deville with a 4.5L engine. Water pump on yours is exactly the same as mine. Just replaced my water pump a while back. There are 2 Torx screws in the center, I think one is hidden under the pulley. If you didnt remove the pulley first you may not have seen that screw. So one screw may still be attached and you just couldnt see it. You need to take the pulley off to get to the one screw I think. And you will remove the water pump from the top. Too keep the pulley in place while unscrewing it, put the serpentine belt back. Link to comment Share on other sites More sharing options...
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