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Honda HRC216K3 Engine cylinder head question

#1

C

Chris Parman

Hello All:

I have a Honda HRC216K3 Engine cylinder head that has developed unleaded fuel residue both on the intake valve and the valve chamber. My question is how to remove the unleaded fuel residue. Any tips are appreciated and suggestions. I have attached a few pictures to this post.

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#2

Scrubcadet10

Scrubcadet10

cleaner and a small wire brush 1760300216659.jpeg1760300185235.jpeg


#3

A

Auto Doc's

Chris Parman said:
Hello All:

I have a Honda HRC216K3 Engine cylinder head that has developed unleaded fuel residue both on the intake valve and the valve chamber. My question is how to remove the unleaded fuel residue. Any tips are appreciated and suggestions. I have attached a few pictures to this post.
Click to expand...
I have seen this exact same coating when a customer had diesel mixed in a fuel can.

I ended up using Chemtool B-12 carburetor spray to finally cut through that stuff.

Diesel fuel requires much high combustion pressure and temperature to ignite, if not what you end up with is a sticky polymer like this.

The other possibility is extremely old fuel that has oxidized from sitting for years, then been used.


#4

Tiger Small Engine

Tiger Small Engine

Auto Doc's said:
I have seen this exact same coating when a customer had diesel mixed in a fuel can.

I ended up using Chemtool B-12 carburetor spray to finally cut through that stuff.

Diesel fuel requires much high combustion pressure and temperature to ignite, if not what you end up with is a sticky polymer like this.

The other possibility is extremely old fuel that has oxidized from sitting for years, then been used.
Click to expand...
Carb cleaner and a cordless drill with wire wheel and safety glasses. Then use green Scotchbrite to finish it.


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