Thread: How to remove bugs from radiator?

Is the radiator still in the vehicle or have you removed it?
I generally soften upp the crusty bugs with hot soapy water (maybe even some bugg off window cleaner) and then pressure clean. If radiator out from both sides.

Bugs are one thing but if you have grass seeds in the radiator then try to avoid using moisture as the seeds will expand and become harder to remove. Dry air pressure first then maybe followed up with water and a bit more pressure.

I usually remove the viscous and shroud, then blow with an air gun from the back. Most will fall between the rad and condenser and then can be blown out from the front.
Then maybe a hose, but I would hesitate before Gerni as it would be easy to flatten the core.
Regards Philip A

Originally Posted by PhilipA

I usually remove the viscous and shroud, then blow with an air gun from the back. Most will fall between the rad and condenser and then can be blown out from the front.
Then maybe a hose,

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but I would hesitate before Gerni as it would be easy to flatten the core.

Regards Philip A

Fully agree.

Propane torch on a very low flame, burn them to ash then wash the radiator with warm soapy water from a hose after its all had a chance to cool down.

Propane torch on a very low flame, burn them to ash then wash the radiator with warm soapy water from a hose after its all had a chance to cool down.

I have never tried that one!
What about the paint on the fins? You would surely then have to repaint.
I would also be afraid of oxidising the copper fins especially if there was some salt around. I have seen some that you could completely disintegrate just by rubbing a finger over them.

However maybe I am living in the past and you are talking aluminium.
Regards Philip A

Originally Posted by PhilipA

I usually remove the viscous and shroud, then blow with an air gun from the back. Most will fall between the rad and condenser and then can be blown out from the front.
Then maybe a hose, but I would hesitate before Gerni as it would be easy to flatten the core.
Regards Philip A

Obviously depends on the pressure cleaner. The small Karcher I have is ideal for doing this and does not flatten fins. Heavy duty high pressure units however should be used with caution.

Originally Posted by PhilipA

I have never tried that one!
What about the paint on the fins? You would surely then have to repaint.
I would also be afraid of oxidising the copper fins especially if there was some salt around. I have seen some that you could completely disintegrate just by rubbing a finger over them.

However maybe I am living in the past and you are talking aluminium.
Regards Philip A

nope works just fine on copper, reduces the work hardening from vibration and if you get it juuuust right doesnt even lift the paint.

remember its a radiator and heat transfer works both ways.