exhaust is leaking by the spark plug

melwood · Apr 17, 2019

I have a 70 ford 3400. 3cyl gasser. the spark plugs are to be torqued to 35lbs. my #2 cly is torqued to 45 lbs and still leaks. It wouldn't be much of a problem except it blows the plug wire off. Is there some kind of sealant to use that would allow the removal of the plug when neccessary?

jaxs · Apr 17, 2019

No,noooo,no sealant on plugs please. Do plugs have metal gaskets? Porcelain some times cracks. Make sure it has correct plugs installed(some plugs don't have a gasket but has tapered seat instead,not interchangeable) Switch offending plug with another plug. Check threads in head for "hilicoil insert" that has failed.

RickB · Apr 17, 2019

And use compressed air to blow the rust and cramp out of the hole the plug sits in.

melwood · Apr 18, 2019

Thanks. I will try that. It probably is rust.

melwood · Apr 18, 2019

blowing the hole out and cleaning the plu worked. thanks for the help.

jaxs · Apr 18, 2019

So is it recommended to routinely blow holes around plugs out to prevent compression leaks? :scratchchin:

RickB · Apr 19, 2019

jaxs said:
So is it recommended to routinely blow holes around plugs out to prevent compression leaks? :scratchchin:

No. It is recommended to blow out the holes before removing the spark plugs. The OP did not do that so he got some kind of debris between the crush ring on the spark plug and the cylinder head. Removing the plug and clearing the debris is recommended to cure that problem.

jaxs · Apr 19, 2019

RickB said:
No. It is recommended to blow out the holes before removing the spark plugs. The OP did not do that so he got some kind of debris between the crush ring on the spark plug and the cylinder head. Removing the plug and clearing the debris is recommended to cure that problem.

Totally make's sense and lead's me to ask a larger question. When asking for assistance,is it recommended to give a little background leading up to the problem? As example,"my tractor run's awful,spitting back through carburetor and die's when clutch is released while in any gear. Any help will be appreciated". (Should poster make it known he rearranged plug wires just prior to when this began?)

RickB · Apr 19, 2019

jaxs said:
Totally make's sense and lead's me to ask a larger question. When asking for assistance,is it recommended to give a little background leading up to the problem? As example,"my tractor run's awful,spitting back through carburetor and die's when clutch is released while in any gear. Any help will be appreciated". (Should poster make it known he rearranged plug wires just prior to when this began?)

Are you a genuine troll or just impersonating one?