mmr cross cylinder head cooling mod

[azgolfrat]

Hey Guys,
I bought this kit from mmr that taps into the freeze plug holes that face straight up at the left rear and right rear of cylinder heads.
Coolant is leaking slowly from the black 1-inch ferrule on the elbow, passenger side.
Anyone run into this problem before?
I thought I would ask before I start taking stuff apart in order to get in there with a big wrench....the kit is pictured below.
Thanks
https://www.modularmotorsportsracing.c om/cart/images/444992_.jpg

[BAD MERC]

Does it say anywhere to use thread tape or sealant? I mean, even if not it's not a bad idea to double up.

[musclemerc]

^^^No need with -AN fittings

[massacre]

^^^No need with -AN fittings

That looks like push-lock hose?
Could be leaking at the hose

[azgolfrat]

Massacre,
the hoses attach over a barb and a hose clamp is used.
The leak is from the female ferrule.
I'm going to get a 1 inch crowfoot and tighten those down just a bit - hopefully this will keep me from having to take other stuff off.

[musclemerc]

That looks like push-lock hose?
Could be leaking at the hose

Rob, how ya been? Good to see your still around.

Your correct push lock not "barb" as the OP stated. Wonder if he used a push lock tool to install the fittings?


Massacre,
the hoses attach over a barb and a hose clamp is used.
The leak is from the female ferrule.
I'm going to get a 1 inch crowfoot and tighten those down just a bit - hopefully this will keep me from having to take other stuff off.

What happens when you tie 2 dead ends together? You end up with a dead end.

I don't see how MMR can advertise this as a "cooling mod". You will need an outlet for it to work as intended.

[azgolfrat]

Hey guys..
the photo I attached above is from the mmr website.
When I saw the comment from musclemerc above, I went out and had another look.
It turns out the two 90 degree connectors are different from one another.
See below photos

5224952250

the left photo is the connector I had a hose clamp on (removed for this photo)
the right photo definitely shows a different connector - perhaps the push lock type mentioned above.
In any case...the leak is not coming from the hose to 90 degree elbow connection.

As far as MMR goes - I am still waiting for them to impress me. :/

[justbob]

Rob, how ya been? Good to see your still around.

Your correct push lock not "barb" as the OP stated. Wonder if he used a push lock tool to install the fittings?



What happens when you tie 2 dead ends together? You end up with a dead end.

I don't see how MMR can advertise this as a "cooling mod". You will need an outlet for it to work as intended.

Internal block heater mod? [emoji6]


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[blazen71]

You can try slightly turning the big nut. If it still leaks I would take it off and check the mating tapers. If there are any scratches or corrosion try cleaning them up with a red scotch brite pad.

[musclemerc]

Hey guys..
the photo I attached above is from the mmr website.
When I saw the comment from musclemerc above, I went out and had another look.
It turns out the two 90 degree connectors are different from one another.
See below photos

5224952250

the left photo is the connector I had a hose clamp on (removed for this photo)
the right photo definitely shows a different connector - perhaps the push lock type mentioned above.
In any case...the leak is not coming from the hose to 90 degree elbow connection.

As far as MMR goes - I am still waiting for them to impress me. :/

Just an FYI both of those are push lock fittings and you put a hose clamp on one not realizing you lost the stop ring that is present on the other fitting. The clamped hose will fail sooner or later (look at the pic its already cracked the long way).

I would back up, drink a cold beer and realize it all has to be removed and reengineered.

You got a little ambitious with the grinder on your lower intake. Ouch!

[azgolfrat]

Thanks for the input. I think.

[musclemerc]

Thanks for the input. I think.

Your welcome. I think.

[massacre]

Good to see you too Travis!
I agree, needs to be re-engineered. I have never been a fan of MMR cooling mod parts.
If it were me i would get some real AN fittings and hose and make new lines.

Edited to add:

On my cars i take the hottest coolant from driver's side head, and send it directly to the radiator to be cooled.
Travis is right, that MMR setup doesn't efficiently move the coolant in the proper way.

[azgolfrat]

Yes, I agree. Not optimized for sure.
Marty thinks there is a better way as well.
Thanks again.

[musclemerc]

^^^ I'm a firm believer in doing a whole lot of research before tearing into a project, then asking for help after the damage is done. This forum has a lot of talent, it doesn't hurt to ask beforehand.

Here is a thread I wrote years ago when cooling mods weren't offered by vendors, and when they did, they offered 1/2" stuff which is way too small to be effective.

My 5/8" Cooling Mod | TCG | The Chicago Garage (https://www.thechicagogarage.com/threads/my-5-8-cooling-mod.117121/)

We took it on ourselves and figured things out on our own utilizing backyard engineering. Siege takes credit for the current (and best) way to route the flow.

I personally use a Cobra Engineering rear cooling mod with Siege's routing method.

https://i.imgur.com/JYWFvCil.jpg

Disclaimer: this information is NOT a for sale ad nor is it intended to serve as such.

[azgolfrat]

Wow, MuscleMerc,
that is a very nice looking set up. I like the hold downs, and of course, the un-dead end.
The rear facing exit points from the head/block dont present a clearance issue?
Next time the engine is out I will consult with you..
FYI - I did eliminate the leak by tightening everything down a bit more. Still not comfortable with it.
I am going to replace one of the 90's.
Thanks
-KK

[musclemerc]

Wow, MuscleMerc,
that is a very nice looking set up. I like the hold downs, and of course, the un-dead end.
The rear facing exit points from the head/block dont present a clearance issue?
Next time the engine is out I will consult with you..
FYI - I did eliminate the leak by tightening everything down a bit more. Still not comfortable with it.
I am going to replace one of the 90's.
Thanks
-KK

The kit from James Hell won't create a clearance issue at all. It cleans up the engine bay and keeps all the hose at the rear of the engine and out of the way. I did use a set of Mustang heater core hoses which fit perfect (you have to use a Terminator valley pipe anyway for a PD blower swap on a MM)

[1Marauder]

I need this done X2!