Coolant Surge Tank - Reservoir - Overflow

[chazd1]

I had a hair line crack in my M998 Surge Tank around one of the small top (pressure side) nipples.

I didnt resist the cheapest knock off version I found and regret buying it. It has/had a poor cheesy spot welds holding the fill cap neck (2 pieces) to the reservoir and no sealant at all between the two metal pieces. Of course it leaked. I did get a refund.

Now I am looking for the correct replacement. I like the square bottom B type since it holds a little bit more coolant.

What should I buy and from where? -- So I don't have this cheap knock off issue again? The welded aluminum ones are a bit much for me at this point.

The part number I find in the Parts Vol 1 TM-9-2320-280-24P-1 PAOZZ 2930012565350 19207 12340061

Part numbers that I have been using to search

12340061 (Square Bottom) 12340062 (Round Bottom)




)

 

[Mogman]

Welcome to the forum! Please take a few minutes to read the forum rules.
You can buy one directly from AMG or get one from the AMG retailers like Kascar or HPG

SURGE TANK ASSEMBLY (12340061) - Powertrain | Genuine Humvee Parts

A0 A1 A2 ECV - 12340061 - SURGE TANK ASSEMBLY - 2930-01-256-5350

genuinehumveeparts.com

If you want to get the one from AMG (link above) contact them to see if one is available even if it shows in stock.

 

[Milcommoguy]

I had a hair line crack in my M998 Surge Tank around one of the small top (pressure side) nipples.

I didnt resist the cheapest knock off version I found and regret buying it. It has/had a poor cheesy spot welds holding the fill cap neck (2 pieces) to the reservoir and no sealant at all between the two metal pieces. Of course it leaked. I did get a refund.

Now I am looking for the correct replacement. I like the square bottom B type since it holds a little bit more coolant.

What should I buy and from where? -- So I don't have this cheap knock off issue again? The welded aluminum ones are a bit much for me at this point.

The part number I find in the Parts Vol 1 TM-9-2320-280-24P-1 PAOZZ 2930012565350 19207 12340061

Part numbers that I have been using to search

12340061 (Square Bottom) 12340062 (Round Bottom)




)View attachment 899024View attachment 899025

Take a look at his older thread. Surprised this is not more common. Knock-off or cheap butt part.

Coolant Tank Keeps Cracking!
Ok ...Back to tell the story. Ready? I too have had overflow tank issues. Being the guy that says "if it ain't broke don't fix it" or this time have some cash to throw at Mr. Humv so bought one of those new style overflow tanks. You see them all over for about a 100 bucks. Out of the box...

• @Milcommoguy
• Post #10
• Oct 27, 2020
• Forum: HMMWV

Another "ME TOO" HumV moment, CAMO

 

[chazd1]

Thanks!! @Mogman and @Milcommoguy

Sorting the wheat from the chaff with the good quality and the absolute junk parts is great help. It is terrific aspect of having knowledgeable folks (who have the experience) on the forum.

I will buy what is recommended today from AMG.

After I cobbed together the OEM Filler neck on the crap knock off I also noticed the threaded inserts in the knock off reservoir didn't have any of the plastic over the inserts... i suspected a small amount of pressure would pull the threaded inserts out... and indeed that is what happened. The OEM filler neck started leaking between the plastic and filler neck despite a new O-ring. Absolute junk.

 

[Guyfang]

Here are the NSN's and Part numbers for that part.

2930-01-256-5350
2930-01-232-9695

12340061
5596079
2930PL0703685

 

[Mogman]

Thanks!! @Mogman and @Milcommoguy

Sorting the wheat from the chaff with the good quality and the absolute junk parts is great help. It is terrific aspect of having knowledgeable folks (who have the experience) on the forum.

I will buy what is recommended today from AMG.

After I cobbed together the OEM Filler neck on the crap knock off I also noticed the threaded inserts in the knock off reservoir didn't have any of the plastic over the inserts... i suspected a small amount of pressure would pull the threaded inserts out... and indeed that is what happened. The OEM filler neck started leaking between the plastic and filler neck despite a new O-ring. Absolute junk.

Just make sure to check with them first, they have a glitch in their system that will show stock but that stock may be on "hold" for a government order.

 

[chazd1]

Some follow up on the Surge tank lesson.

I weighed the cheap knock off and the OEM tank.

The weights below are both square bottom 12340061 (Square Bottom). The original 12340062 (Round Bottom) " is shown in this pic.

Cheap Knock-off ---- 1 Lb. 11.7 Ozs
OEM ---- 2 Lbs. 3.1 Ozs

The quality different is striking.

 

[Milcommoguy]

If a magnet stick to the brass looking parts... It's a knock off.
If it doesn't have inspection stickers "AGM"... It's a knock off.
If it doesn't hold pressure... It's a knock off.
If it's white as in plastic milk carton... It's a knock off.

I might be a red neck... But NO Red China parts for me, CAMO