Raw Water Pump
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=791
Printed Date: November-24-2024 at 11:48pm
Topic: Raw Water Pump
Posted By: Jim_In_Houston
Subject: Raw Water Pump
Date Posted: September-06-2004 at 5:13am
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Hey all. My newly acquired 1968 Mustang with a Ford 289 has a sucking problem. The previous owner advised me that when first starting the engine it must be reved up to get the raw water pump to pumping OR plaining the boat will also get it pumping. He said he replaced the impeller but that did not help. Well, he is absolutly right. Am I in need of a new pump? Could the problem be a blocked line somewhere? Your help is appreciated. The engine heats up pretty fast if no water is moving though it.
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Replies:
Posted By: Rick
Date Posted: September-06-2004 at 4:43pm
I would try looking at the thermostat. is it sticking. Try running without it and see if if solves the problem. If not I would try to replace the impeller one more time. Call SKIDIM and make sure you are getting the right one.
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http://www.correctcraftfan.com/diaries/details.asp?ID=250&yrstart=1996&yrend=2000%20" rel="nofollow - 2000 Ski
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Posted By: 88skisupreme
Date Posted: September-13-2004 at 1:26am
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The pump could just be worn out, sometimes it just need repacing. I have a spare I could sell you if you are looking for one.
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Posted By: jimbo
Date Posted: September-13-2004 at 2:09pm
I had an over heating problem this weekend also. I pulled the thermostat and it's running cool now. I'm ordering a new one today. Is there any problem running with out a thermostat for the short-term? (Other than the engine not warming up as quickly--the lake temperature is 80 degrees).
RE the water pump question...I seem to remember when a water pump goes out on a vehicle, it leaks around the seals. Is that right? Would this happen in a non-pressurized cooling system?
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Posted By: mrese
Date Posted: September-13-2004 at 2:23pm
Without the t-stat, the operating temp wont't get hot enough, the engine parts won't expand the the optimum size, and so you may experince some engine damage from loose tolerances between them. Without the t stat, the engine shouldn't get much more than 110 degrees.
Operating without the t stat to trouble shoot or to get back home is fine. I wouldn't run for several hours with it out.
Put the t stat in boiling water with a theometer to ensure it isn't opening and closing at the right temp (143 or 160 depending on t stat) This could help pinpoint your problem.
The engine water pump can leak if it is worn, it is underpressure when the engine is turning. The Raw water pump shouldn't leak, it will suck in air rather than leak out water if the seals are worn.
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Posted By: Jim_In_Houston
Date Posted: September-14-2004 at 3:16am
Thanks 88. How much do you want for your pump? Is it an exact bolt-in replacement for the pump on a '68 Ford 289? You can email me at jim@drivesys.com.
Thanks.. jim_in_houston (look out for Ivan!!!!)
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