Dropped Something In My Cooling System :/

[BlackBox]

So while working on my r34gtt I had the intake manifold and runners off, I had rags in the intake ports in the head but nothing in the cooling jacket. I was stripping some wire when a piece of rubber insulation maybe 5mm wide and 10mm long fell into the head, the water port between cylinder 1 and 2 ..

After a few failed attempts to remove it, it can't even be seen now. It felt like it was going great downwards towards the thermostat but even last ditch attempt at blowing compressed air down there hasn't made it reappear. How harmful could this be?

I figure worst case it damage to water pump or block up a small water gallery.

Waterpump and thermostat are removed BTW

[Missileman]

really cant predict what will happen if left in there, worst case is it lodges in a jacket in the head and causes a hot spot. I would be trying to flush it out with water the way it came in ????

[iruvyouskyrine]

I wouldn't care and would happily run the engine. Deteriorating thermostat seals or people overly happy with liquid sealant would be do more damage than a tiny bit of insulation.

[BlackBox]

Yep flushing with water is my next step, tried to avoid it since half the motor is pulled apart.

Only other way I can think of is pulling the head off

[Ben C34]

I wouldn't care either.

[Jordy32]

Probably wouldn't care too much either, but if the water pump is off just shove a hose in the top hole and blast it out the water pump hole

[GTRPSI]

Pfft, what you cannot see cant hurt you.

[iruvyouskyrine]

Leave it, put motor back in car. Rev it up like bambambambam and if no overheating it's all good [emoji106]

[BlackBox]

I flushed some water down there and water came out the turbo coolant supply so I hope it doesn't block that up

[admS15]

I'm in the wouldn't worry about it boat. Put it back together drive it. If it overheats start to worry then. If it runs fine but it still bothers you, flush the system after its been pressurised a few times. If it still bothers u after all that, light up a stick of dynamite and move on to your next car:)

[Jordy32]

a piece of something that big won't cause any damage, and/or will get caught in the radiator top tanks as it would be too big to pass through the fins so it'll just sit there

No problems

[tridentt150v]

Prob melt and seal up a leak

Wouldn't worry about it, I bet millions of new cars come off production lines with insects and metal and other crap in their coolant, fuel, and even oil systems and nothing happens.