I have a 1980 ford f100, running a 351 cleveland, I have fitted 2 new water pumps, both times the shaft and bearing have moved forward after a few days driving, the impeller scrapes inside the water pump, all the pulleys are aligned, it is only running a single belt driving the alt/water pump, the first pump was cast iron, the second was alluminium, it is not over heating, no other problems
2006-10-17 10:49:32 · 9 answers · asked by kenandwei 2 in Cars & Transportation ➔ Car Makes ➔ Ford
The only possible answer to that question would be that even though you say your pullys are allighned you most in likely have a bad fan blade or there is a bind on your weater pump, even a small allighnment problem can cause extreme stress at 40,000 RPM's
2006-10-17 11:24:44 · answer #1 · answered by Robert Y 3 · 0⤊ 0⤋
I would still be leaning towards alignment issues are at play here. What I would recommend is putting it on a dyno, not to check the power but so you can see what is happening while the engine is under a power load. I did build an engine once that could not keep belts on, they spun off. I have seen some truly strange things happen. Perhaps the strangest was a thrust bearing allowed to much crank shaft end play and as a result the starter was binding on the flywheel. Yet another was a cam shaft retainer not installed properly allowed the timing chain to snap. Another possibility is the crank damper pulley and not being seated properly.
2016-05-21 21:44:31 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Because your water pump is shot and about to let loose and go through the radiator! If you are replacing water pumps and this is a continuous problem, then you have alignment problems on your pullies! Somethings bent or discombobulating!
2006-10-17 11:00:31 · answer #3 · answered by Anonymous · 0⤊ 0⤋
youre talking about end play right. it shouldnt do that. you had to of gotten a bad rebuilt water pump next one you get open it there at the store. and check for end play. also when you install it make sure you can pull the belt up at least a 1/2 inch. adjusting it to tight will also cause this.
2006-10-17 10:59:09 · answer #4 · answered by duc602 7 · 0⤊ 0⤋
Being that that's not the original engine,you probably have put a flex fan on.I have had similar problems with these fans,check the blades to see if the rivets have loosened up.
You could be buying cheaply rebuilt pumps too.
2006-10-19 23:13:23 · answer #5 · answered by want2wild 5 · 0⤊ 0⤋
Cheap water pump, stuck fan clutch, if it has one, or missing blade on the fan, usually fan out of balance, or overtightning belt.
2006-10-17 23:53:13 · answer #6 · answered by kayef57 5 · 0⤊ 0⤋
i am a machinist, it sounds like you either didn,t seat the bearing all the way or it is an engineering problem. the fit for the bearing could be too deep.
2006-10-17 12:12:38 · answer #7 · answered by Anonymous · 0⤊ 0⤋
try a new pump instead of a rebuilt they are not that much more$$ unless your time is worth it to keep changing it
2006-10-17 10:55:48 · answer #8 · answered by vincent c 4 · 0⤊ 0⤋
perhaps your overtightening your belt. it could be pulling the shaft to the side and "walking " it out.
2006-10-17 10:55:18 · answer #9 · answered by pnybt 4 · 0⤊ 0⤋