Oil Leak on 91 f150 - FordTough.ca - Home of Canadian Ford Truck Enthusiasts
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post #1 of 13 (permalink) Old 04-13-2009, 01:17 PM Thread Starter
 
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Oil Leak on 91 f150

my 91 f150 leaks oil like nooo tomorrow, near the back of the engine, but i never seem to loose oil? its always on full, any suggestions?
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post #2 of 13 (permalink) Old 04-13-2009, 03:04 PM
 
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is it engine oil(light brown to black)or trans fluid(red)?


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post #3 of 13 (permalink) Old 04-13-2009, 04:49 PM
 
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Oh, it's oil, its all over the road in front of my house. Hey Clayton, go to CTC get some good degreaser a lot of rags and I'll give you a wire brush. Get under the truck and clean everything around the pan, then wait for it to leak so you can see where its coming from. And don't make your old man do it.
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post #4 of 13 (permalink) Old 04-13-2009, 05:44 PM
 
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haha someones getting owned lol


could be rear main seal... if its a slow enough leak might not notice it on the dipstick....



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post #5 of 13 (permalink) Old 04-13-2009, 10:35 PM Thread Starter
 
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Quote:
Originally Posted by LayinHp View Post
haha someones getting owned lol


could be rear main seal... if its a slow enough leak might not notice it on the dipstick....

what hes reffering to is my dad was showing me how to grease my grease nipples today cause ive never done it before, and thanks andy good idea,
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post #6 of 13 (permalink) Old 04-13-2009, 11:05 PM
 
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try some of that stop leak crap that is supposed to recondition seals and gaskets



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post #7 of 13 (permalink) Old 04-26-2009, 11:27 AM
 
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could be a few things....oil travels to the back of the vehicle with the wind...my '94 had bad intake gaskets and also the timing chain cover leaked..yep, expensive to fix...when I first took it in we had oil from nose to tail from the leaks...oddly, the valve cover gaskets were dry...lol
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post #8 of 13 (permalink) Old 04-26-2009, 05:11 PM
 
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pressure wash the undercarriage, they have guns that reach under there, its pretty hard to tell where its coming from when its all over the place. My dads old 79 used to pour oil when he stopped to get gas...you could see the leakage on the highway from when he started slowing down about 100 yds worth. the wind would drive it back and up, it would puddle or pool somewhere, perhaps in the transmission bell housing.
I had an 89 that I pulled the motor and replaced the rear seal, it still leaked, just not from the rear seal hehehe.
I have a theory OLD FORDS all leak, thats why they run so long, you are constantly adding fresh oil! keep it up and it will last you 1 000 000 K.
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post #9 of 13 (permalink) Old 05-10-2009, 06:07 PM Thread Starter
 
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hahaha yeah im taking it to a garage this week to check a throttle positioning sensor cause i cant change it im gonna see if they can find the problem thanks guys
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post #10 of 13 (permalink) Old 05-16-2009, 08:07 PM
 
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they can add a dye to help identify the source
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