So I have been driving my G37 Sedan for about 5 years now and today noticed slight coolant seepage from the top of the Radiator Hose where it clamps near the oil dipstick. I cleaned off the coolant and connector that had been dripped on and re-clamped the hose back. I later noticed more coolant seepage. Any thoughts? Will new hose and clamp fix this or is there possibly a bigger issue going on? At 82k Miles Thanks guys.




Seepage from Tube


Seepage on Connector

 

A new hose would be recommended but when you pull the hose off really inspect teh aluminum fitting. Our Maxima had seepage like that and when I removed the hose that fitting was corroded in several areas and went all the way through in a couple places. I ended up using a dremel w/ wire wheel to clean it up, then ground any excess corrosion off so it was back to bare aluminum. I then used JB weld, let it fully cure (IIRC it was a full 24 hours) then sanded it smooth and has been fine since.

But maybe it's just a tired hose in your case

 

I had that issue, I pulled the hose off, cleaned the connector, cleaned off the hose, so far no leaks.. and yes I used a bit of light sand paper to get all the corrosion off.

 

All good advice... new hose, clean/sand the surfaces, etc. Here's something else you can do:

http://www.phase2motortrend.com/prod...165blk-kmi.htm

 

i made a thread regarding this. i moved the clamp away from fill neck little by little and its practically gone as far as seeping although mine wasnt as bad as your. mine was very minimal. id try that keep moving the clamp till ur problem lessens

 

Thanks for the tips guys I don't always post, but always checking this place out. I ended up ordering a new OEM Hose and Clamps from Local Infiniti dealer. Hose was like $21 and Clamps were like 2.95 Each. I did additionally order one of those cool looking clamps in black that Rochester posted which was like $9, but worth it if I have the issue again I'm sure.... and it looks more modern lol. Thanks Gentlemen!


I'll post some pics of the overflow assembly so you can see what it looks like under the hose when it's removed soon as I get the new parts. I'm sure I will end up having to clean it up a bit. Rotary tool sounds like it should do the job with a proper attachment. Steel wire brush?

 

Well just got the parts in and good thing to because last time only a little was leaking. I filled the reservoir to MAX line and after a week of commuting its at the MIN line!!!! Will follow up with photos soon.

 

Drain the coolant a little bit so the coolant level is below the upper radiator hose so when you go to un-clamp the upper radiator hose, you won't get coolant spilling all over the place.

There should be a drain petcock near the bottom of the radiator. You may want to bleed the system to be safe afterwards.

 

No need to drain the radiator because of the upper hose. If you go to Harbor Freight, you can pick up a cheap plastic hand pump for just a few dollars. First drain (suck, LOL) from the rad cap to below the hose. The disconnect the hose at the top, stick the tube down the hose and drain it (suck it, LOL) down to the other end. It might seem like a lot of effort just to change the upper hose, but if you think about it, pretty clean technique if you're doing this in your garage, and don't want to make a mess. Although you're not talking about a lot of coolant. Probably about 12 oz, like a soda can.

Then you just pour it back in through the radiator cap... done. The coolant is off the top anyway.

 

Well here she is fellas and Rochester.... thanks that clamp is great!


Used a hand pump, great suggestions guys.


Yuk


Dremel and a steel brush adapter.


New hose and New clamp! That clamp is not going to get loose.

I ended up also cleaning the throttle body on the left since took out the Air Assembly which was covering the Radiator inlet from the hose. It was bad! Will do the right one next weekend.

Thanks again for the tips and parts! Yes, that clamp is a must for all Rochester! Great tip Brother!

 

Nice job getting that all cleaned up w/ that nice new clamp. Nice to see you only had some minor pitting under the hose.

 

Yes, it was interesting to find out only some minor pitting. Also checked my air filters. For some reason the one on the left (looking from under the hood) is much dirtier than the other.

 

Happy to help, OP.

P2M sure did design an awesome hose clamp.

 

So after I had fixed that leak.... another appeared. After fixing the previously leak, I later had noticed my coolant reservoir still draining. After a few weeks I did my oil change and immediately notices I had a problem when I saw the left side of the transmission case covered in lines of coolant. Here's what I had found.











Where the hose is between the two arrows was where are the coolant was leaking from. I pushed the hose on to be more snug and now will wait and see if further action will be required.

Any thoughts or inputs fellas? BTW that's not a nut on the bottom its just a blue line on a hose in a hose. weird... is that stock or same on your rides?


***UPDATE*** I purchased the hose and clamp for around $10 another $12 shipping $22 Total. Gonna fix this myself. I bet they would charge like $150 easy lol.

 

Bump^^ Any thoughts fellas? Otherwise just going to replace the hose and clamps.