302 engine flush?
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New User
Joined: Mar 2004
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From: myrtle beach
302 engine flush?
I am a young one and don't know as much as i would like to so should i flush my '72 302 when i change the oil this time? it is in good running shape but has never been gone though, will this help or hurt? thanks
Elder User
Joined: Sep 2003
Posts: 794
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From: Portland, OR
Are you talking about coolant flush or oil flush? Coolant flush is a good thing to do when radiator fluid starts looking cruddy or every year or 2. I only use crankcase flush products if I'm dealing with a very sludged up engine, after I fixed a bad head gasket or on a running core engine I plan on tearing apart and rebuilding before I take it out of the vehicle. I would worry about oil flush products destroying an older engine's valve seals and rear main seal. For older engines that have very bad looking oil and minor blowby I will run the engine very hard and change the oil immediately while still hot 3 times in a day or spread the changes over a couple of days. This has worked great for me several times and not worked only once.
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