Can anyone tell me the actual name of these two parts on the top of the valve cover?

jpjeep26uk

YJ Enthusiast
Joined
Nov 12, 2022
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163
Location
UK
....and they keep coming lol
Can anyone tell me the actual name of these two items on the top of the valve cover please. I took them off to see what's in the holes and the rubber grommets are totally shot. I figured these valves?/ sensors? must be ancient and time for a replacement along with the grommets. But dont know the precise name to search for.
Thanks all.

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The front one is a PCV valve or "Positive crankcase ventilation" valve. They are typically $5 or so at any auto parts store. You should be able to hear the check ball rattle freely if you shake it a bit. Although my 91/4 cyl is different a bit there is also a rear line like yours. On mine it goes to the air box so it can suck in filtered air into the engine. To prevent a oily mass inside the valve cover there are baffle plates at either hose location. Im guess in on yours it may be a empty can or sorts or what is called a "catch can" the oily mist can accumulate and drain back into the engine. Could be wrong on this one but its my guess.
At any rate DO not destroy any parts that you might think are worn out and easily replaced as some are not by a long shot, like that "catch can" as I call it. Your TBI injection was only used a few years and may prove to be a bit difficult for replacement parts when needed.
 
Hi, it came off the line in November 1988 heading straight for West Germany as a dedicated export. Hope that helps? (I have no clue about the AMC bit, it is to do with the engine?)
 
So does that make my valve cover, if not the whole engine, an AMC ? Is it like Fender? They were great until 66 when CBS bought them haha? I also heard Renault or Peuguot bought Jeep too....woah!
 
Ah OK I was looking all over for the letters amc but you mean the logo at the end of the three lines. Cool. I don't know my Jeep history so well. Is AMC a good engine then and are there other ones in a YJ?
 
Ah OK I was looking all over for the letters amc but you mean the logo at the end of the three lines. Cool. I don't know my Jeep history so well. Is AMC a good engine then and are there other ones in a YJ?
1988 YJ
all YJ HAVE A PCV SYSTEM 2 PATHS, ONE SUCKS (VACUUM END) AND THE OTHER IS FRESH CLEAN AIR. BY LAW USA FOR AGES.
IT EATS UP THE NASTY CRANKCASE, BLOW BY GASES, SO HUMANS DON'T BREATH IT. END STORY. PCV
seen here for 60 years. (by law) 1961 to NOW.

wiki jeep history is is no secret. just read it. now is FCA. (fiat) in the usa we get parts from rockauto, for parts pure 1988 custom to this car.
the valve clogs easy from the oily nasty fumes passing through it and is top service item, for sure at the 60k mile service, point.

the 2.5L is very rugged engine, (as is the 4L that just has 2 extra cylinders). they are sisters
the block and head are both cast iron. (pure love there) no easy to crack aluminum heads.!
on mine NO EGR is here, love that too for sure, ever spend 2 days long cleaning out endless carbon'ed up EGR paths,
the enigne is OHV push rod, and no cams to wreck in the head for sure those pesky DOHC twin cam heads and with rubber belts run.
the OHV just runs and keeps going like a TIMEX watch , takes a lick'n and keeps on ticking, no kidding.
the best years are 91 to 95 YJ (or even better a JK jeep, 3.6L ) the TJ 96 has the best electronics (USA), OBD2 and 10x more easy to diagnose.
the TBI older years is ok (my guess your is still TBI)?
the carb BBC + electronic BBC controller stink to heck.
the FSM is free to read and get seen at the next link,
here is a free manual for the car, at one of the best places to get any kind of manual , im and downloads are free 87

https://www.manualslib.com/manual/836314/Jeep-1987-Wrangler.html?page=477&term=pcv&selected=1#manual

page 477 is PCV
the valve is a spring loaded check valve,. they love to clog up, so we buy one or just clean it, (soaked in , acetone solvent over night) most folks just replace it.

a Jeep from Germany, may have unique parts, after all it meets there smog laws not ours. (their call )
the VIN answers all that, the first 4 digits decode to target country and their smog laws.
end smog

learn that 1 model car may have up to 6 engine choices day 1 new ,sold in 50 different countries, and is by THEIR laws not ours USA>
no vin posted so , no idea at all what you have.
the best engine here is the 4.0L Inline 6, for better low end torque, I have the 2.5L and doing fully upgrades to it to get 100% like new performance.
The best parts are at rockauto, or crown or jeep yj parts Omix-ADA

but all normal service items here, in usa is endless supply,
brakes.
hoses
belts
tires (wheels)
sensors (SMP or NTK ,etc)
engine parts (real ) or transmission can be problematic.
clutch is easy (got an M/T?_)
u-Joints
filters
all fluids easy
axle bearings easy
shocks
, nuts and bolts , easy as pie.
gaskets , Felpro wins
 
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that rear PCV fitting is the fresh air end.
that may be 1 of 2 things in that huge tube.
a filter or a baffle inside and some can clog too.
if both ends clog the engine leaks oil out front and rear crank seals.
and more.
both ends not clugged. is a goal.
if clogged it can also push oil and blowby fumes back to the air filter (main) and soak it in oil. not a good thing.
I look at the air filter first.