Question about 1991 Jeep Wrangler

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How much motor oil do I put into a 1991 Jeep Wrangler? It is a 6 cylinder. Somewhere about 4000 cc.

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With an oil filter(recommended)5.7 litres or 6 qts

Posted on Oct 15, 2010

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1 Answer

Where is the pcv valve in a 1991 jeep wrangler 4 cylinder


where is it, on a 2.5L I4 jeep. 1991. ok. first ever post with engine size.
bravo that. amazing....
the FSM covers this. factory service manual;,.
ok, i see you are reading books or web sites that have generic tuneup information, not relate to real jeeps, yes?
or bob with a toyota told me to change it out? yes?

Guess what?, there IS NONE.
it only has and ORIFICE.
and sure it can clog, and does, in fact i drove for 500,000 miles
in 3 jeeps. and cleaned it vast times.
on one car , the grommet got old and it the orifice collapsed.
and i had to buy a new one from jeep.
see word FIXED below.?
when it clogges, the engine leaks oil
and the oil pukes (backups) and dumps oil on the air cleaner.
there is no PCV valve, on this engine. but that dont mean its service free.






1d4c96fd-4de0-4f15-a00c-001f18919664.jpg

Sep 29, 2014 | 1991 Jeep Wrangler

1 Answer

Whats the best way to change out the valve cover gaskets on my 1993 Jeep Wrangler?


Wrangler 6 cylinders engines are a straight 6 engine with only one valve cover. The gasket for the valve cover is sold separately from the entire valve cover so it can be replaced.

Feb 28, 2013 | 1993 Jeep Wrangler

1 Answer

My 1991 wrangler 6 cyl runs for few min then what appears to be exhaust and some oil comes out pvc and dipstick, whats wrong?


Sounds like a compression ring in one of your cylinders has broken and compression is being pushed into oil pan. Cylinder compression getting past the piston, instead of going out the exhaust it's going into oil pan and coming through engine (dipstick, air cleaner, PCV.) You'll need to have a compression test to confirm.

Jan 08, 2011 | 1991 Jeep Wrangler

1 Answer

How do you remove the serpentine belt off a 1991 jeep wrangler 4.0 6 cylinder?


Hi Alex,

They are a pain the first time. There is a deceptively easy trick to it. I wrote out the step by step for taking it off / putting it on.

Click here for the trick

Hope you find it helpful

Mike

Dec 26, 2010 | 1991 Jeep Wrangler

1 Answer

Where is the oil sending unit located on a 1991 jeep wrangler 4 cylinder?


Under hood, driver side, lower engine area, front of distributor, mounted in engine block.

It looks looks this;




ledsled378_6.jpg

Nov 25, 2010 | 1991 Jeep Wrangler

1 Answer

I have a 1991 jeep wrangler.Getting motor oil in the air filter.What could cause this to happen? No PCV valve to replace.


Yes there is a PCV valve, you just have to look for it.
Engine may be over full on oil.

Jan 04, 2010 | 1991 Jeep Wrangler

1 Answer

JEEP oil leak


your oils sending unit is leaking the part is not expensive,

Jun 29, 2009 | 1990 Jeep Wrangler

4 Answers

1991 jeep wrangler clutch


U have what is called a hydraulic clutch, one of the hydraulic cylinders hs failed, there is a master and a slave cylinder. The most likely and most common cylinder to fail is the slave cylinder, this requires the transmission to be pulled out to replace it. the art is around $125.00, while the trans is out u might as well replace the clutch, the labor is about the same. Here is a picture of the part, let me know if u can see it.



1abd4ec.jpg

May 13, 2009 | 1991 Jeep Wrangler

1 Answer

99 jeep wrangler


get a 6 cylinder motor drop in this is best gas saver for most vehicles 4 cylinders dont have the ability to push all the weight of a vehicle but runs smoothly
6 cylinders are as i put in words are evenly balanced for everyday use and not gas guzzler either

May 16, 2008 | 1999 Jeep Wrangler

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