Odd coolant leakage

[4x4_Welder]

89 GL Turbo, new radiator and flushed system-

I keep having an issue with the cooling system. Not overheating, not even moving up on the gauge really. It's just that when I get on it a bit, it starts dumping coolant somewhere on the top of the engine, and it's not very visible. I did replace the upper coolant hose to the turbo, and I am sure that's not leaking. It doesn't seem to be coming from the thermostat housing, or the intake either. Is there something else I am missing?

FWIW- Getting on it is briskly accelerating from ~35 to ~75, flat road.

Also, is it as much of a PITA as it looks to change that lower coolant hose on the turbo?

[Twitch de la Brat]

I don't know if this applies to you, but underneath the spare tire, om the driver's

side, between the heater core and the engine block are a pair of hoses.

I had one burst and I had coolant all over my engine.

That might be what you're looking for.

You may have the turbo in the way as well, I'm not sure, never seen a turbo

EA82 before. :-\

 

Twitch.

[Frank B]

There's a small coolant hose, about the size of the fuel line, that warms the throttle body. Also could be the intake gaskets.

[Caboobaroo]

I'm willing to bet its the hose that goes from the top of the block to the intake, right dead nuts in the center of the engine, basically right behind the PS pump. They never get replaced and will split, causing a coolant leak. Gonna say thats it.

[4x4_Welder]

Frank B nailed it. The one on the right side split right at the lower clamp. That was probably the biggest pain of anything I have dealt with on this car so far, mostly due to low blood sugar and dehydration. That and all the plastic PCV lines breaking.

The heater hoses are on the left, and are quite new, the radiator hoses are new, the upper turbo hose is new, and the lower ones looks fairly recently replaced. This throttle body hose seemed to be the last one left to blow.

[rpholz]

just out of simply curiousity.... why would you want to heat up a throttle body? totaly makes a cold air intake kinda uselss no?

[4x4_Welder]

It prevents the throttle body and blade from icing up in cold weather.

[rpholz]

ooo ok. see i live in florida so i would never think of that lol. thanks!

[Frank B]

Glad you found it.

You could bypass it, the throttle body, but I doubt you'd notice any difference since the intake is heated by the coolant flowing through it.

[4x4_Welder]

The spider intake doesn't actually seem to have coolant flowing through it. It has a separate water manifold that sits behind the intake, and bolts to it at the ends by the heads.

[Frank B]

Well, you may notice an improvement then. The bypass and a good true cold air intake may be a good mod.

[4x4_Welder]

Of course, the turbo just dumps a ton of heat into the inlet airstream anyways, so not much gain.

I'll intercool it once I'm moderately wealthy, or at least not on my rump roast broke.

[Frank B]

Well, there's a few ways to reduce the heat in the turbo. You could wrap it in header wrap, the fiberglass heat insulating material, they sell that in a blanket form for turbos. You could plumb a heater core in the coolant hose to the turbo, effectively reducing the coolant temp before it reaches the turbo, and maybe one after the turbo to reduce the amount of heat dumping into the cylinder head. And simply increasing the flow of the exhaust after the turbo will let the exhaust flow through it and reduce saturation time.