Help needed - Coolant spit around overflow reservoir

[banditti]

Nothing from around the radiator cap. Doesn't have the cracked radiator issue. Only seems to spit coolant from the reservoir top. New reservoir cap? Doesn't seem bad, broke or craked.

What say you?

 

[CharlieS]

Wash it off with clean water and keep an eye on it to see if it happens again. Is the hose affixed to the elbow with the barbed nipple on the tank cap? Coolant should go out that way if there is overflow.

 

[banditti]

Wash it off with clean water and keep an eye on it to see if it happens again. Is the hose affixed to the elbow with the barbed nipple on the tank cap? Coolant should go out that way if there is overflow.

I have washed it off... it came back.. sigh. I'll grab a btter pic of the cap/hose

 

[CharlieS]

Ok, something seems amiss. I've had two different 200 series and never seen anything like this. Any chance your overflow hose is kinked or plugged (insect, mud dauber nest, etc.)?

 

[Sandroad]

Have you removed the radiator cap to have look at the cap, core, and reservoir outlet? Time for a new radiator cap and also new hose to the reservoir? Or maybe you'll find a leaking hose/connection/reservoir cap?

 

[banditti]

 

[banditti]

View attachment 2634675

View attachment 2634677

I’ll check cap and hose for blocks.

 

[tdcruiser406080100]

Since coolant is leaking from the cap all over the expansion tank Seems it’s either a broken cap or the tank is overflowing from too much expansion. Have you noticed it full when engine is hot? Weak radiator cap? Engine getting too hot for some other reason? Just thinking...

 

[banditti]

I just ordered a new OEM radiator cap and coolant reservoir cap. Stay tuned/

 

[TomEf]

I just ordered a new OEM radiator cap and coolant reservoir cap. Stay tuned/

It looks like there's a groove where a seal or o-ring might be able to sit in the old reservoir cap. Might be worth checking the new one to see if there's a seal there.

 

[banditti]

New parts came in. There is a rubber seal that was missing on the one in my LX that came with the new one. All better.

 

[Snafu13F]

Hmm, mine has been doing this since I had the radiator changed last fall. Do you have the part number for the reservoir cap handy? I’m gonna go check this.

 

[banditti]

Old on the left, new on the right. You can see it is missing that rubber washer.
Mine is a 2011
Part No.: 16405-50080
CAP SUB-ASSY, RESERV

 

[Snafu13F]

Yep, not only is mine missing, I have maybe a quarter inch of fluid in the tank! Excellent timing on your post

 

[lbcadvntr]

Old on the left, new on the right. You can see it is missing that rubber washer.
Mine is a 2011
Part No.: 16405-50080
CAP SUB-ASSY, RESERV
View attachment 2641154

Hey @banditti, did issue go away for good after you installed the new reservoir cap?

 

[lbcadvntr]

Hmm, mine has been doing this since I had the radiator changed last fall. Do you have the part number for the reservoir cap handy? I’m gonna go check this.

@Snafu13F, that's interesting. did you end up buying a new reservoir cap? If so, did it resolve the issue?

 

[banditti]

Hey @banditti, did issue go away for good after you installed the new reservoir cap?

Yes sir

 

[lbcadvntr]

Yes sir

Awesome. thanks for confirming.
any thoughts is to why it was spilling over with old cap?
you think just due to sloshing around while driving?

 

[bloc]

Awesome. thanks for confirming.
any thoughts is to why it was spilling over with old cap?
you think just due to sloshing around while driving?

The rubber gasket under the cap is probably missing.

 

[terrapin]

I just replaced my fan shroud on my 2010 LX and it came with a new reservoir and cap. The new cap has a full width rubber seal and the old cap had nothing. I can't imagine that we all lost the rubber seals. I don't think the original came with one.