I havea1976 honda 750 and the 2 inner spark plugs are siezed.The 2 outer ones came out fine.I soaked the inners incyclo break away over night and now can move them 1/64 of an inch.
Still VERY tight.How can I get them out and leave the threads in the head,Thanks.Doug
Siezed spark plugs
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Tyrone ORourke
- Veteran
- Posts: 78
- Joined: Tue Mar 07, 2006 2:38 am
- Sex: Male
- Location: Prague/Czech Republic
Seized plugs are terrors. Be very very careful.
You can always try with some more oil agents for a few days, and if that fails a light heating(with a blow torch) of the heads might help, due to thermal expansion.
On that note be careful not to overheat anything, and spread the heat evenly so as not to create a buckling effect of unbalanced expansion.
Alternatively you could run the engine till the heads are warm, as this might help, but be careful with your hands.
You can always try with some more oil agents for a few days, and if that fails a light heating(with a blow torch) of the heads might help, due to thermal expansion.
On that note be careful not to overheat anything, and spread the heat evenly so as not to create a buckling effect of unbalanced expansion.
Alternatively you could run the engine till the heads are warm, as this might help, but be careful with your hands.