Question about 1989 Jeep Wrangler

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My 89 jeep wrangler 2.5 4 cylinder has 2 holes in the valve cover. Front is for pcv valve. What is the rear hole for?

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  • Jeep Master
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One at front usually goes to the air cleaner box...rear one is for pcv valve, but if cover was installed backwards they may be reversed. Pcv hole usually has a baffle inside to keep it from sucking oil into the airstream.

Posted on Sep 12, 2009

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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.






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Sep 29, 2014 | 1991 Jeep Wrangler

1 Answer

How do i know if i need a valve job on my 1990 4cyl jeep wrangler YJ


  1. compression test. 2 pressure test using a fitting in plug hole with air compressor attachment welded to it. check that the valves that you are checking on each cylinder are in the fully closed position listen for air escaping into the exhaust manifold then do the same for the inlet side hope this is of some help

May 30, 2014 | 1991 Jeep Wrangler

2 Answers

Use 4.0 valve cover on 90 4.2l engine omit pcv valve use breather


not a good idea, engines rely on negative pressure(vacuum) for seals on crank and camshaft seals
also for emission standards, sorry

Jun 30, 2010 | 1990 Jeep Wrangler

2 Answers

1990 YJ JEEP WRANGLER


the motoor is having trouble breathing pcv may be clogged check all breathers clean as needed or its over filled

Jun 21, 2009 | 1990 Jeep Wrangler

1 Answer

2000 Jeep Wrangler TJ


The tube that comes out of the top of the valve cover is your pcv.
The grommet that it goes into gets blocked.

Oct 14, 2008 | 2000 Jeep Wrangler

1 Answer

1995 Jeep Wrangler YJ


a right angle pipe coming out from the top of the valve cover with a rubber hose attached. if you it out, shank it! it should sound like a mabble inside of it.

Oct 14, 2008 | 1995 Jeep Wrangler

1 Answer

1998 Ford Explorer sport 4.0L 4x2 PCV Valve Location


the pcv is located on the rear(firewall) of the drivers side valve cover.turn counterclockwise and pull to remove be careful there are 2 small tabs inside the pcv hole in the valve cover(can feel with small finger) this is to hold valve in place so it wont leak.if you have a oil leak at the pcv a quick fix is to put a small amount of silicone around the pcv o-ring and install.wait hours for silicone to set up.

Sep 25, 2008 | 1998 Ford Explorer

1 Answer

Distrbutor to spark plug wiring


Hey there janandshane,

I've got a 91 Wrangler, lots of fun. Here's your info.

Viewed from above, front of vehicle on the right side, cylinder locations are:
6 5 4 3 2 1 for a six cylinder and 4 3 2 1 for a four Cylinder

The firing order is:
1 5 3 6 2 4 for the six and 1 3 4 2 for the four.

The distributor rotation is clockwise.

To find Top dead center (for wire to cylinder #1 on distributor), look for and line up the timing marks on the crankshaft (front of the engine).

Or, pull the #1 spark plug, stuff the hole with a cork or a rag. Slowly crank the engine until the cork pops out.

Pull the distributor off. The rotor is pointing where the plug for cylinder #1 should go. The rest of the wires go in the firing order clockwise.

That about covers it.

Remember: Good things come to those who rate. How about a nice FixYa?

Mike

Aug 16, 2008 | 1987 Jeep Wrangler

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