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Old 05-16-2010, 09:32 PM  
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Default Oil Pump Bad ??? Help

Hi Everyone,

I have a 86 Samurai. My engine recently started knocking like it needed oil. I checked through oil cap and it looked like no fresh oil was being distributed to my cams. I just changed the oil and filter to see if that would help but the knocking seemed to get even worse. I am thinking my oil pump might have gone out. There also seems to be an oil leak.

Any Advice???
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Old 05-17-2010, 12:49 AM  
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is the oil leak up front? The oilpump is inside the waterpump housing on the front of the engine. That is where the front oil seal is as well. If you plan on opening up the front of the engine that's a great time to do the timing belt and replace the waterpump.
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Old 05-17-2010, 07:56 AM  
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How many miles since the engine was rebuilt? If never and it is an '86, then it is due.

Pull the valve cover and make sure the screws that holds down the rocker arm shafts are not missing or loose. Loose or missing could result in lower oil pressure. Run the engine with the cover off to check for oil flow. If you have oil flow, then try adjusting the valves if it has not been done recently. Do with the engine cold.

What weight oil did you put in when you changed it? Might want to try a heavier oil like 20w/50 to see if that quiets it down. If it does, then the problem is probably in the lower end of the motor. Do not use synthetic if you have an oil leak as it will only leak worse.

Does your oil pressure idiot light work? A mechanical one would let you know if the oil pump is still functioning and at what pressures.

The Parts Dinosaur is a good place to order an oil pump and other engine parts.
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Old 05-17-2010, 08:56 AM  
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Quote:
Originally Posted by Greeksurfur View Post
Hi Everyone,

I have a 86 Samurai. My engine recently started knocking like it needed oil. I checked through oil cap and it looked like no fresh oil was being distributed to my cams. I just changed the oil and filter to see if that would help but the knocking seemed to get even worse. I am thinking my oil pump might have gone out. There also seems to be an oil leak.

Any Advice???
You say your "engine recently started knocking like it needed oil" - to be honest I find that frightening, I've been driving for over thirty years and the way I know my engine needs oil is by checking the dipstick, not by how it sounds, and not by waiting for the oil light to turn on.

By the way - you don't mention if the oil light is on or off.

If you're getting a knocking with the oil light off you most likely have one or more bearings (main or conrod) with excessive clearance - I suspect you may be looking at a rebuild rather than a "quick fix".
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Old 05-17-2010, 09:25 AM  
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I had a knocking once that progressively got worse. It turned out to be a loose valve guide. Rest of the engine was fine, just a valve guide rattling around. Had to pull the whole engine apart though to replace it. If it's just making a ticking sound then it's probably not serious and just needs adjustment and a tuneup, but if it's a knock or a rattle then you should have a mechanic look it over if you aren't mechanically inclined.
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Old 05-17-2010, 09:56 AM  
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History:Thanks for the help. My car does not have a oil pressure guage unfortunately. I also do no know the extensive history of the car I bought it two months ago. It says it has 77xxx, so I am guessing 177,xxx the guy said it sat for a few years. The oil light is not on, but I wouldnt trust it anyway.

When I was drivin and it started to knock there was alot of oil all over towards the front the engine on the driver side of the car. Right to the left of where the timing belt housing wouldl be. Do you think this is pointing to oil pump?
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Old 05-17-2010, 10:04 AM  
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Originally Posted by Baratacus View Post
is the oil leak up front? The oilpump is inside the waterpump housing on the front of the engine. That is where the front oil seal is as well. If you plan on opening up the front of the engine that's a great time to do the timing belt and replace the waterpump.
I thought the oil pump was under my oil pan? I am getting this info from my Haynes manual.
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Old 05-17-2010, 10:31 AM  
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The oil pump is neither under the oil pan or in the waterpump housing - it's on the bottom front of the engine, directly behind the crankshaft timing pulley, and right about where you describe the leak as being.

Does the oil pressure light turn on when the ignition is turned on, before the engine is started?
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