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Post by clynch781 on Jun 17, 2019 6:58:23 GMT -6
I just bought an 87 454 ltd bobber that needs a new water pump. The guy said he finished some work on it and fired it back up and heard the water pump pretty much explode and make a grinding sound. He pulled the pump off to find the impelled shredded. It was shut off immediately and hasn't been run since. This is my first bike and first project ever, I dang near got the thing for free. I have very little idea what I'm doing but I know the the hole where the coolant runs from the block to the water pump (the one with the metal coolant line) has a bunch of aluminum debris. My concern is where that debris has gone, the damage itll cause and how to flush everything out. The oil needs flushed, what spilled out was like baby poo green so its fresh oil, water and coolant. Where do I go from here?
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pya977
Junior Member
Posts: 300
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Post by pya977 on Jun 17, 2019 9:49:31 GMT -6
just one thing to remember the impeller comes off counter clockwise.
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Post by clynch781 on Jun 17, 2019 9:55:10 GMT -6
The impeller and water pump are off already. I'll remember when replacing it. But what do I do about the debris the went into the block? How do I flush that?
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pya977
Junior Member
Posts: 300
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Post by pya977 on Jun 17, 2019 11:40:51 GMT -6
not to sure about the block you are talking about, do you mean the pipes that go to the top of the engine?
seeing as the water system is a circuit just with water in it ie the radiator rubber pipes etc. i would suggest that you take off as much as you can and clean them out with water, plushing the whole system for any debris .
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Post by clynch781 on Jun 17, 2019 13:16:54 GMT -6
Theres two hoses that come off the water pump, a metal one and a rubber one. The hole where the metal one goes from the pump has a ton of aluminum pieces in it. So from what you are saying I should be able to just run water through it then to flush it.
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pya977
Junior Member
Posts: 300
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Post by pya977 on Jun 17, 2019 14:50:30 GMT -6
all the parts that come off easy just clean them out. you can always run a garden hose though the parts that you cannot get off.
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Post by knoizy on Jun 17, 2019 16:03:37 GMT -6
So long as there was no previous debris or part-destruction of the impeller, your thermostat will have stayed shut and the radiator should have been out of the loop at the time. Still, its worth replacing the pump then doing a complete overhaul of the cooling system, I'd suggest to do this on any used bike. Careful with some of the clips, small hoses and radiator it can be fragile stuff that needs a gentle removal if its been sat a while, I use a rounded-off flat screwdriver to pry old hoses. You'll want to test the thermostat and couple of senders its not too difficult and all detailed in the blue kawasaki workshop manual.
I'm presuming the basics of engine, radiator, carbs and intake are all stock but if its been bobbed you never know. Maybe post some pics with where you are up to.
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Post by bikeman on Jun 17, 2019 16:48:45 GMT -6
Theres two hoses that come off the water pump, a metal one and a rubber one. The hole where the metal one goes from the pump has a ton of aluminum pieces in it. So from what you are saying I should be able to just run water through it then to flush it. yes. as you don't know this may help you understand. as you say there are two pipes one rubber and one metal. the rubber one comes from the radiator goes into the pump from the front. the impeller then forces the coolant though the metal pipe into the engine. [that's why there is debris in there to flush it all out you need to find the two smaller rubber pipes on the top of the head. this is where the coolant goes when it exits the engine, put a hose on both of these pipes and back flush the whole engine so you don't leave any bits in there. when you refit the new water pump make sure you replace the rubber O rings on the metal pipe with new ones. |
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Post by clynch781 on Jun 17, 2019 21:59:29 GMT -6
Thank you all for the help I'll let you know how things go. My next question is any recommendations on where to find a rear fender? I want something short to match the bobbed style
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Post by clynch781 on Jun 17, 2019 23:35:18 GMT -6
Ok so new issue. I cant find where I read it but I remember something being mentioned that if there is play where the impeller screws onto theres some issue. Not sure what that part is called or what the issue is or how to fix it but mine moved a lot and I see that the play it has is what caused the impeller to shred. The opening it sets in in the middle of the waterpump back plate is mangled. Any ideas here?
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pya977
Junior Member
Posts: 300
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Post by pya977 on Jun 18, 2019 1:08:37 GMT -6
check on the cmsnl website and you will see the diagram of each part of the water pump. check that you are not missing anything may be a seal or anything damaged. as for the rear mudguard i used a trailor one and cut it to the size i wanted
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Post by bikeman on Jun 18, 2019 10:29:01 GMT -6
Ok so new issue. I cant find where I read it but I remember something being mentioned that if there is play where the impeller screws onto theres some issue. Not sure what that part is called or what the issue is or how to fix it but mine moved a lot and I see that the play it has is what caused the impeller to shred. The opening it sets in in the middle of the waterpump back plate is mangled. Any ideas here? afraid there is no easy fix or short cuts. you need to replace the water pump, ALL OF IT. right back to where the spindle joins the counter balance shaft and anything inbetween that's missing or damaged. I suspect the PO knew this and is the reason you got it so cheap. it's going to be an expensive and time consuming repair. but if you don't do it. you will be back in the same situation short order. |
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Post by clynch781 on Jun 18, 2019 19:12:07 GMT -6
Would it be possible to put a 96cubic inch harley motor on this frame?
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pya977
Junior Member
Posts: 300
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Post by pya977 on Jun 19, 2019 1:18:45 GMT -6
most things are possible if you have the talent, skill, equipment, time, money, stick with the en motor and you will learn a lot and have fun. if its not fun anymore sell it
good luck
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Post by bikeman on Jun 19, 2019 4:13:57 GMT -6
most things are possible if you have the talent, skill, equipment, time, money, stick with the en motor and you will learn a lot and have fun. if its not fun anymore sell it good luck yeah plus 1 on that. the thing to remember is. is it worth all the hassle. you know what the issue is you now know how to fix it. there are only two real options fix it or flog it. the previous owner decided to do the latter. it is up to you what you do next. let us know what you decide. until then any further discussion is pointless. |
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Post by eaglerider on Jun 19, 2019 7:17:27 GMT -6
You could always find an EX500 engine, from a 1994, 1995 Vulcan with belt drive.....bolts right in, with some swapped parts from the EN450 (discussed in other posts here on the forum), and if no belt drive engine, easily swap to chain drive.
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