Coolant leak

[Josparkz]

I fired up my old 96 and stepped out to clean the windows. I noticed something leaking. It turns out to be coolant, coming from some sending unit (?) on the forward passenger side , up underneath the exhaust manifold and forward of the oil filter. Sound familiar?
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[BigPapa]

There is no sending unit in the area you describe, certainly not one related to coolant.

 

[Josparkz]

There is no sending unit in the area you describe, certainly not one related to coolant.

It seems to have a plug (electrical) going to it and and it definitely has coolant coming out of it. I can't get at the shop manual now. Thank you. I'm stumped on this one.

 

[BigPapa]

Unless something’s been added to yours, the only thing electrical on that side is the AC Compressor. Oil pressure, coolant temp, intake air temp are all on the driver side.

 

[Josparkz]

Unless something’s been added to yours, the only thing electrical on that side is the AC Compressor. Oil pressure, coolant temp, intake air temp are all on the driver side.

Whatever that is it's been there from birth. I will get a better look when I'm not standing in the sun at 102 <LOL>

 

[GAmes]

Do you mean aft of the oil filter, as in block heater?

 

[Josparkz]

Do you mean aft of the oil filter, as in block heater?

Nope. Forward and above it, so it seems. I think it is the lube oil cooler or something right on top of it.

 

[Josparkz]

I'll have to take a picture.

 

[jghflys]

 

[Josparkz]

It's coming from the silver knurled thing. I was wrong, it's aft of the oil filter and not an electrical connector but a tube. I think it is the oil cooler.

 

[GAmes]

The oil cooler assy is what the oil filter mounts to. What you have pictured is the block heater. The silver knurled thing is the electrical cord connection. The new ones angle down from the heater and have a hexagon nut. Ours stick straight out. https://www.genosgarage.com/product/heater-cable-fl/winter

 

[GAmes]

View attachment 129047

That isn't where the temp sensor is located on a 12 valve.

 

[BigPapa]

Gary’s correct, as usual, that’s the block heater.

That isn't where the temp sensor is located on a 12 valve.

No, that’s right. That’s the left rear of the head, behind the fuel filter.

 

[jghflys]

That isn't where the temp sensor is located on a 12 valve.

Depends on the year, from 1996 Service manual. I had one.

 

[GAmes]

Depends on the year, from 1996 Service manual. I had one.

Yes, as the picture shows, it is on the left rear of the block. Not the right front where the OP has a leak. When I looked at the drawing I misinterpreted, thinking the fuel filter shown is an oil filter.

 

[Josparkz]

The oil cooler assy is what the oil filter mounts to. What you have pictured is the block heater. The silver knurled thing is the electrical cord connection. The new ones angle down from the heater and have a hexagon nut. Ours stick straight out. https://www.genosgarage.com/product/heater-cable-fl/winter

Okay. Thank you. I thought the block heater was down on the bottom underneath # 6 cylinder sort of.

 

[Josparkz]

The oil cooler assy is what the oil filter mounts to. What you have pictured is the block heater. The silver knurled thing is the electrical cord connection. The new ones angle down from the heater and have a hexagon nut. Ours stick straight out. https://www.genosgarage.com/product/heater-cable-fl/winter

Okay then, so the o-ring probably failed then. I'm hoping if I take off the turbo hose I might get my arm in there. Thanks.

 

[GAmes]

There is a trick to removing the block heater. The screw in the center is connected to a T-bar inside the block. DO NOT fully remove it or the T-bar will fall down inside the water jacket and might be irretrievable. You can see it in the picture. Personally I'd spend the $$$$ for a new one. https://www.genosgarage.com/product/bh-3916127/winter

 

[BigPapa]

I’d spring for a new one, too.

 

[Josparkz]

There is a trick to removing the block heater. The screw in the center is connected to a T-bar inside the block. DO NOT fully remove it or the T-bar will fall down inside the water jacket and might be irretrievable. You can see it in the picture. Personally I'd spend the $$$$ for a new one. https://www.genosgarage.com/product/bh-3916127/winter

So it's not a captive screw then.