Re: carbon build up

Posted by fredkanter On 2017/7/17 13:35:21

A recent buildup of carbon is unlikely to be "baked on" and thus easy to remove. I've never needed anything more than a 1" or so paint scraper of a gasket scraper with a plastic handle. Bring each piston to TDC and in 4 minutes the piston and area around it is done. Some carbon will always build up, anything left will not be a problem. Make sure to remove any scrapings from the head gasket seal area.

If you fix the cause of the buildup (choke ??) and drive the car while gunning it under hard acceleration you will see black smoke, that will be the carbon being blasted off. About the only effect the carbon will have if left there is to boost the compression a bit and on a low compression Packard that's not a bad thing.

I know it feels real good to clean it off, enjoy.