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Car Forum / Volvo Cars / March 2007'90 740 Turbo - Water pump installation probs, I got 'em bad
Hey all. Am almost halfway through installing a new water pump. Have unbolted the old pump, but am unable to pull it loose it loose from the metal return tube that attaches to the back of the pump. It seems really stuck, and if I didn't know any better, I would think it was welded on. Am i just not pulling hard enough? My Haynes manual only covers 740s until '88 and the Chilton manual I have is effing useless. The tube is not bolted on as shown in the Haynes manual, and has a flat bottom to it. It just won't budge. Its not welded on, is it? Any advice? Thanks to any and all who have pearls of wisdom for me. A > Hey all. Am almost halfway through installing a new water pump. Have > unbolted the old pump, but am unable to pull it loose it loose from [quoted text clipped - 8 lines] > > A The tube is bolted in to the water pump all B230F series engines share the same water pump look harder & you will see what you are missing on your quest Glenn  Signature" Anyone who has never made a mistake has never tried anything new" -- Albert Einstein > The tube is bolted in to the water pump all B230F series engines share > the same water pump look harder & you will see what you are missing on > your quest > Glenn Right you are, Glenn, thanks. Its on the underside of the tube or pipe. Trouble is, I still cannot free the water pump. The gasket sealing the pump and the heater pipe is 'baked' on tight. I cannot free it to save my life. Is there some sort of solvent I could carefully use on the gasket to free the pump? I've also tried lightly tapping the pipe fitting, all to no avail. It seems stucker than stuck. Any advice, fellow Volvoids? Dying to get back on the road. > Is there some sort of solvent I could carefully use on > the gasket to free the pump? Yes. Soak it overnight in PB Blaster. > Hey all. Am almost halfway through installing a new water pump. Have > unbolted the old pump, but am unable to pull it loose it loose from [quoted text clipped - 8 lines] > > A Did you remove the bolt clamping the pipe in? Beyond that it just pulls out. > Did you remove the bolt clamping the pipe in? Beyond that it just pulls out. Oh man, I wish it was just that. But yes, all bolts present and accounted for. I know it stretches the imagination, but the gasket on the tube has hardened, melted or aged to such a degree that it will not let the pump go. Not sure if I can soak anything overnight, as the pump is still very much attached to the heater tube, which is still attached to the car. Perhaps a careful and judicious application with a rag to catch any drips or spill might do it. Thanks all for the advice. >> Did you remove the bolt clamping the pipe in? Beyond that it just pulls >> out. [quoted text clipped - 7 lines] > application with a rag to catch any drips or spill might do it. > Thanks all for the advice. I don't feel my imagination all that stretched; I've seen a few really old gaskets do that. I'd also like to think the gasket wasn't "sealed" with something unwanted. Perhaps a judicious application of a torch or dry ice to the pipe side of the joint? I'm hoping the aluminum will expand or contract while the metal of the pump does not (because it isn't heating or cooling) and the bond will shear. I've never tried that, though; the times I've come across it the pieces were in a place I could use a plastic mallet on the side of the loose piece to crack it. Don't bother trying to get a chisel in the edge; it chews up the metal and doesn't really convince the gasket to let go. Mike >>Did you remove the bolt clamping the pipe in? Beyond that it just pulls out. > [quoted text clipped - 6 lines] > application with a rag to catch any drips or spill might do it. > Thanks all for the advice. Remove the whole tube and work with it on the bench. It goes around the back of the head and attaches to the heater hose. > Remove the whole tube and work with it on the bench. It goes around the > back of the head and attaches to the heater hose. Shizit, I was hoping to avoid that. I don't trust myself to remove the exhaust manifold and the turbo. Or rather I don't trust myself to put it back together correctly. PB Blaster has not worked. A block of wood and a rubber mallet hasn't either. I fear I'm off to seek (and pay for) professional help unless there's a magical 8th solution to all this. Thanks for all the advice. >>Remove the whole tube and work with it on the bench. It goes around the >>back of the head and attaches to the heater hose. [quoted text clipped - 5 lines] > (and pay for) professional help unless there's a magical 8th solution > to all this. Thanks for all the advice. You shouldn't have to, IIRC it will come out from behind the manifold without removal, you may have to remove the bracket holding the bottom of the turbo though. Also you might try heating up the water pump until the rubber seal melts, I'm not sure how it could hold it on so tight though, you're *sure* you didn't miss a bolt? > You shouldn't have to, IIRC it will come out from behind the manifold > without removal, you may have to remove the bracket holding the bottom > of the turbo though. Also you might try heating up the water pump until > the rubber seal melts, I'm not sure how it could hold it on so tight > though, you're *sure* you didn't miss a bolt? Ha ha, I'd say the same thing had I not removed all the bolts with my own hands and cried tears over its being stuck with my own eyes. I'm a bit reticent to disassemble things further, but I've already taken various hoses off so maybe The Next Step is in order. Thank you, Mr. Sweet. I will update. |
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