Topic Options
#2401642 - 11/10/17 08:15 PM 3.3 minivan coolant leak near trans cooler lines?
360view Offline
master

Registered: 01/18/06
Posts: 4139
Loc: USA
2005 3.3L V6 Town&Country minivan Extended length wheelbase.
99,000 miles.

Spotted a coolant leak today on my Mon's van:
driver's side lower radiator corner
near where the transmission cooler lines connect.

As best I can see the leak may be where
the bottom of plastic side tank
crimp connects to the aluminum radiator core.

No sign of coolant in the ATF and trans dipstick level was at mark.
Radiator was still full but overflow tank was empty.
No sign of dents or impacts.

Is there something else near that spot
that commonly causes a coolant leak on these vans?

Top
#2401713 - 11/10/17 10:26 PM Re: 3.3 minivan coolant leak near trans cooler lines? [Re: 360view]
rhad Offline
mopar

Registered: 08/19/03
Posts: 607
Loc: garnett kansas
most likely the plastic tank is cracked,i have seen them crack right by the crimp and it looks like the crimp is bad,you have to look close to see the crack
_________________________
my ladder of success is missing some rungs

Top
#2401773 - 11/11/17 05:44 AM Re: 3.3 minivan coolant leak near trans cooler lines? [Re: 360view]
360view Offline
master

Registered: 01/18/06
Posts: 4139
Loc: USA
This 2005 model year vehicle has the official Chrysler reddish orange coolant mix.

Apparently some Chrysler owners do not like that particular antifreeze formulation.

Is it prone to cause plastic to crack?

Does it attack seals or gaskets?

Or is the problem insufficient aluminum protection?

Top
#2401882 - 11/11/17 10:36 AM Re: 3.3 minivan coolant leak near trans cooler lines? [Re: 360view]
moparx Offline
master

Registered: 09/03/03
Posts: 7937
Loc: north of coder
my vote is for the tank crack, or possibly a bad core at the crimp due to aluminum corrosion caused by ???
beer

Top
#2401966 - 11/11/17 12:45 PM Re: 3.3 minivan coolant leak near trans cooler lines? [Re: 360view]
AARCONV Offline


Registered: 03/06/03
Posts: 4866
Loc: NEW JERSEY
use a radiator pressure tester to verify, I think autozone might loan those tools out?
_________________________

Top
#2401972 - 11/11/17 12:49 PM Re: 3.3 minivan coolant leak near trans cooler lines? [Re: 360view]
wingman Offline


Registered: 06/23/04
Posts: 2088
Loc: St. Charles, MO
Do a pressure check. We had that exact van and same problem I thought it was the radiator. Turns out the small hose to the overflow tank was leaking and causing the overflow tank to empty.

Top
#2402034 - 11/11/17 03:33 PM Re: 3.3 minivan coolant leak near trans cooler lines? [Re: 360view]
360view Offline
master

Registered: 01/18/06
Posts: 4139
Loc: USA
I will double check the hose from radiator pressure cap to overflow tank.
Since the radiator cap is on the passenger side
and the coolant overflow tank is on the drivers side
that hose is extra long on this van
and its path is twisted around wiring bundles and other sharp edged metal structures.
It could easily get rubbed and develop a leak.

I will rent a pressure tester.

Top
#2403154 - 11/13/17 03:44 PM Re: 3.3 minivan coolant leak near trans cooler lines? [Re: 360view]
360view Offline
master

Registered: 01/18/06
Posts: 4139
Loc: USA
Long hose from radiator cap to overflow tank checked out good.
Overflow tank checks good.

Failed pressure check.
Leaks from same driver side lower spot as when running.

Top
#2403231 - 11/13/17 06:11 PM Re: 3.3 minivan coolant leak near trans cooler lines? [Re: 360view]
SNK-EYZ Online   tonguue
master

Registered: 01/30/07
Posts: 7860
Loc: Lost in Space
The Mother in laws 2008 Grand Caravan had a coolant leak last year.

It ended up being one of the Y's that split the heater hoses for front and rear.

On her's they were on the drivers side at the firewall.

A Y shaped plastic tube, it split along a seam.
_________________________
Signature pic now hosted at Flickr!


Kayse can't keep up at all now. lol

Top
#2403380 - 11/13/17 11:33 PM Re: 3.3 minivan coolant leak near trans cooler lines? [Re: SNK-EYZ]
rhad Offline
mopar

Registered: 08/19/03
Posts: 607
Loc: garnett kansas
i repaired radiators for 37 years,my bet is still on a cracked plastic tank!!
_________________________
my ladder of success is missing some rungs

Top
#2403391 - 11/14/17 12:04 AM Re: 3.3 minivan coolant leak near trans cooler lines? [Re: 360view]
RapidRobert Offline
Circle Track

Registered: 11/20/03
Posts: 32710
Loc: Lincoln Nebraska
Quote:
I will rent a pressure tester.
I didn't see this in time to offer a possible easier solution, You can buy a "tank valve" from Oreillys for less that $3 out the door & screw it into the cooling sender 1/8 NPT port & with an air chuck with shop air & a tire psi gauge pump the system up to 10 & see where it leaks from if external (hopefully not internal).


Attachments
SAM_0837-003.JPG


_________________________
live every 24 hour block of time like it's your last day on earth

Top
#2403489 - 11/14/17 10:44 AM Re: 3.3 minivan coolant leak near trans cooler lines? [Re: 360view]
360view Offline
master

Registered: 01/18/06
Posts: 4139
Loc: USA
Had a 5 year old one pint bottle of Dike Radiator temporary leak seal, the one recommended by Cummins.

I had never used any and decided to try it.

Mixed the one pint of gooey green mixture into 1 gallon of coolant as per instructions. Takes a fair bit of mixing, and I used a gloved hand to break up the last of the clumps.

Poured into cold radiator.
Discovered i should have drained out 1.5 gallons and put extra half gallon into overflow tank, because not all the mixture would go back into the radiator due to trapped air.

Put cap back on, started engine, and let coolant come up to normal running temperature.
Slow drips from radiator stopped within 15 minutes.
Shut off engine and let cool overnight.
Was able to add another pint of mix to radiator this morning.
Started engine and let it come up to normal temperature.
No visible drips during half hour of running.

Still plan to replace radiator.
At same time replace water pump and hoses.

My gut tells me anti-leak mixture would be expected to wear water pump impellor faster.

Top
#2403507 - 11/14/17 11:22 AM Re: 3.3 minivan coolant leak near trans cooler lines? [Re: 360view]
Transman Offline
mopar

Registered: 03/27/11
Posts: 431
Loc: Michigan
Chrysler used to add a pellet to each vehicle back in the day. Was a combination of natural shredded wood products and some other stuff compressed in to a pellet the size of a bottle cap in diameter. Looked like s smaller cork.

The water pump expert in the engine group told me it actually helped keep the ceramic seal clean and in good condition in the water pump.

Top

Advertisement
Sponsored Link
Forum Stats
24,969 Registered Members
32 Forums
185,452 Topics
2,149,419 Posts

Most users ever online: 882 @ 03/05/17 10:15 PM
Moparts Newest Topics
70 Cuda Grille and Grille Molding Options
by rss
11/25/17 02:19 AM
Garage door guys. Help leveling door.
by MoparPosterChild
11/25/17 12:47 AM
Well, I did it. '17 Challenger.
by 68SportFury
11/24/17 10:23 PM
Similarity between new Durango taillights and 70 GTX grill
by Airgrabber
11/24/17 10:11 PM