What size is my oil drain plug? - JeepForum.com
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post #1 of 24 Old 10-13-2021, 03:23 PM Thread Starter
HarveyCat
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I want to replace it with a cap that has a built in valve to make changing easy with less mess. Size seems to be 1/2 20. Is this correct and has anyone used things like these? Please see attached photo.

I have a 2003 Laredo 4.0L GC WJ

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post #2 of 24 Old 10-13-2021, 06:00 PM
xcaliber81
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I think it will still be the same amount of mess. I have more faith in my drain plug.
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post #3 of 24 Old 10-13-2021, 07:11 PM
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Check out Fumoto instead. Much better for that type of application. I have them on 3 vehicles, gonna add one to my trans pan in the future as well. I typically order mine through Chris of Watson Synthetics. Chris will know what one you need
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post #4 of 24 Old 10-14-2021, 06:42 AM
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Quote:
Originally Posted by Brallen86 View Post
Check out Fumoto instead.
^^^^^THIS^^^^^

I love the Fumoto drain! Inversely, I tried a Dorman drain that made me nervous as to how little it took to open, collected trail debris, and spouted like a sprinkler head when you did drain it. Piece of garbage - avoid.

Back to Fumoto. 5 stars. Have one on almost all my vehicles now. https://www.fumotousa.com/cars-picku...erokee-4-0l-l6
On my 4.7, I added the elbow that pops in only when you drain. It better directed the stream to a drain pan. It has barbs for a hose, but I did not require one. The 4.0 might not need it at all - not sure how your drain pan is shaped. https://www.fumotousa.com/all-products/sl-10.html

2004 WJ, 4.7 N, daily driver.
1967 Jeep J100 panel truck (a-rusted development)
1970 'Cuda, 340 4bbl (10.952et @ 123mph)
1972 Dart Swinger, Gen III 6.4l Hemi (in progress)
1974 AMC Gremlin X, 440 6bbl (trailer queen, 9.466et @ 144mph)
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post #5 of 24 Old 10-14-2021, 04:57 PM Thread Starter
HarveyCat
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Fumoto it is. BTW - what oil filter do you guys use? I use Rotella T6 5/40 oil.
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post #6 of 24 Old 10-15-2021, 06:22 AM
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I use Purolator PBL30001 on my 4.7. It's a larger filter than OEM, and bumped my oil capacity by almost a full quart. The 4.7 has notoriously small oil drain back holes in the head, so when you are really on it the valve covers are literally filling with oil. I figured the extra capacity can't be bad a bad thing.....
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2004 WJ, 4.7 N, daily driver.
1967 Jeep J100 panel truck (a-rusted development)
1970 'Cuda, 340 4bbl (10.952et @ 123mph)
1972 Dart Swinger, Gen III 6.4l Hemi (in progress)
1974 AMC Gremlin X, 440 6bbl (trailer queen, 9.466et @ 144mph)
1975 Jeep Cherokee Sport 2-door (in progress)
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post #7 of 24 Old 10-15-2021, 11:03 AM
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Quote:
Originally Posted by HarveyCat View Post
Fumoto it is. BTW - what oil filter do you guys use? I use Rotella T6 5/40 oil.
I'm an Amsoil guy, use it in everything from my jeeps to my toys where I can. Started off as a preferred customer and became a dealer last year. Really like their products and the rebuild is getting nothing but Amsoil aside from some of the breakin fluids that Amsoil doesn't offer but the filter I use is the EAO42
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post #8 of 24 Old 10-15-2021, 05:17 PM Thread Starter
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Quote:
Originally Posted by Mr. Bitey View Post
I use Purolator PBL30001 on my 4.7. It's a larger filter than OEM, and bumped my oil capacity by almost a full quart. The 4.7 has notoriously small oil drain back holes in the head, so when you are really on it the valve covers are literally filling with oil. I figured the extra capacity can't be bad a bad thing.....
Will the Purolator PBL30001 fit my 4.0l?
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post #9 of 24 Old 10-15-2021, 06:13 PM
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A search of Rock Auto shows the same filters being used on both the 4.0 and 4.7

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post #10 of 24 Old 10-15-2021, 08:02 PM
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Ditto on Amsoil. 30years now and far more miles per spent dollar.

For a WEAK and IGNORANT people, SERF-dom is a Reward, not a Curse. W1CCW
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post #11 of 24 Old 10-17-2021, 03:05 AM
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When I worked at the dealership I was pretty particular about the oil I used. I was a whatever came out of the pumps for free guy. I didn’t pay for oil or filters for 10 years
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post #12 of 24 Old 10-17-2021, 12:04 PM
Brallen86
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Originally Posted by WJ60 View Post
A search of Rock Auto shows the same filters being used on both the 4.0 and 4.7
Correct. Funny enough I'm running a ford focus filter on my XJ with the 4.0 though as I removed the 90 degree adapter and the factory filters hit the motor mounts and punch a hole in it...only took 3 factory filters before I figured this out haha. The focus filter (i think it's the 2.0 or 2.3 w/turbo I I sourced from) is also rated for larger V8s above 5L just FYI

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post #13 of 24 Old 10-17-2021, 12:36 PM
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Purolator show 3 filters for the 4.7 Harvey.

https://www.pureoil.com/en.html

Last edited by Delta0; 10-18-2021 at 12:11 PM.
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post #14 of 24 Old 10-17-2021, 12:45 PM
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Quote:
Originally Posted by Mr. Bitey View Post
I use Purolator PBL30001 on my 4.7. It's a larger filter than OEM, and bumped my oil capacity by almost a full quart. The 4.7 has notoriously small oil drain back holes in the head, so when you are really on it the valve covers are literally filling with oil. I figured the extra capacity can't be bad a bad thing.....
I suspect there's a fly in the ointment of your logic Mr B.

From my end of the microscope, no matter how big (or small) your oil filter is, it won't make any difference to the amount of oil in your sump.

The only difference I can foresee is that more oil means a longer time to come up to temp on cold days.
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post #15 of 24 Old 10-17-2021, 07:02 PM Thread Starter
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Originally Posted by rjh41388 View Post
When I worked at the dealership I was pretty particular about the oil I used. I was a whatever came out of the pumps for free guy. I didn’️t pay for oil or filters for 10 years
Ok - but when you are paying for it - do you think Rotella 5w40 (T6) - is best for these?
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