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1K views 6 replies 4 participants last post by  PawRocks 
#1 ·
Hi guys, the names Michael. Found the site while searching for Nissan repair and maintenance online, so i thought i should register today. I currently have trusty a 2005 Nissan Frontier. Nice community.
 
#4 ·
HELP!!!!!!

I HAVE A 96 NISSAN MAXIMA WITH 225,000 MILES ON IT. I HAVE REPLACED THE THERMOSTAT AND THE RADIATOR. NOW THE THE IS PISSING WATER LIKE NO OTHER. WHEN I PUT WATER INSIDE THE RADIATOR IT STARTS PISSING. SO I CHECKED THE WATER PUMP DRAIN PLUG (DRY), SO I STARTED TAKING OFF THE AC COMPRESSOR AND THE BRACKET. I FOUND WERE IT WAS LEAKING FROM BUT THE THING IS I DONT REALLY KNOW WHERE ITS COMING FROM BECAUSE ITS DRIPPING FROM THE BOTTOM OF THE ALTERNATOR NOT BEHIND IT BUT LIKE ON THE BOTTOM SIDE OF IT. SO CAN IT BE A HOSE THAT TRANSFERS THE COOLANT OR CAN IT BE THE WATER PUMP?


ANY SUGGESTIONS WILL BE GREATLY APPRECIATED.
 
#7 ·
Welsh Plugs / Freeze Plugs / Blind Plugs

Sorry I don't have a manual, I can't tell you exactly where they are for your model :( I'm still looking for a manual for my Nissan Terrano.

Have a look at these links. Found out that they call them freeze plugs or blind plugs in other parts of the world!


Pictures of welsh plug before and after (corrosion/leaking) :-

Google "1989-1998: Frost Freeze Expansion Plug Tutorial"


On some engines they are under the inlet and exhaust manifolds :-

https://www.youtube.com/watch?v=tXBpLptUEsA


They may also be called Plug Blind on the Nissan Engines. Exploded views for different Nissan engines :-

2005 Nissan Frontier Crew Cab OEM Parts - Nissan USA eStore


Bit on the cooling system incl welsh/freeze-plugs

Automotive Cooling Systems -  A Short Course on How They Work | CarParts.com


They are fairly easy to replace if you can get to them. Some motors have welsh plugs on the back of the motor as well, hopefully they aren't leaking.

When I replaced mine, I put a screw driver through the middle of the corroded plug (easy), reefed it out with water pump pliers and cleaned the hole. Be careful not to damage the block when pulling them out. Someone else may have a better removal method?

When you put the replacement back in make sure you use the correct compound with the welsh plug to seal it properly. BTW, once the new one is in, it's pretty hard to get out until it corrodes.

I used "stag jointing compound" on the block and welsh plug, a bit of wood and a mallet to get mine in :)

Don't forget the once per year anti-corrosion fluid in your radiator to reduce welsh plug / engine corrosion.
 
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