Knight did pass the time by typing:
> Hi all,
> I have a 1986 Cherokee Pioneer with the dreaded 2.5L I noticed while under
> the hood checking vacuum problems that I have a small blow by ...its around
> a sparkplug... have tried pulling the plug and cleaning around it and
> everything..no dirt or anothing there. Any idea's on how to fix this... With
> the blowby I am losing compression in turn losing power... any help would be
> great! Thanks in advance!!

swap plugs and see if the problem moves.
If so it's the plug that's cracked, if not it's
the threads.

That's the number one reason why a torque wrench should be used on sparkplugs.
I've seen several engines where a gorilla twisted the threads off.

Save-a-thread works
http://toolrage.com/prodView.asp?idproduct=1091
http://www.metricscrew-toolco.com/newpg1.html

Remember to use oil on the tap and remove/clean it
frequently. Any metal shavings in the cyl will be bad juju.

--
DougW

 

Knight did pass the time by typing:
> Hi all,
> I have a 1986 Cherokee Pioneer with the dreaded 2.5L I noticed while under
> the hood checking vacuum problems that I have a small blow by ...its around
> a sparkplug... have tried pulling the plug and cleaning around it and
> everything..no dirt or anothing there. Any idea's on how to fix this... With
> the blowby I am losing compression in turn losing power... any help would be
> great! Thanks in advance!!

swap plugs and see if the problem moves.
If so it's the plug that's cracked, if not it's
the threads.

That's the number one reason why a torque wrench should be used on sparkplugs.
I've seen several engines where a gorilla twisted the threads off.

Save-a-thread works
http://toolrage.com/prodView.asp?idproduct=1091
http://www.metricscrew-toolco.com/newpg1.html

Remember to use oil on the tap and remove/clean it
frequently. Any metal shavings in the cyl will be bad juju.

--
DougW

 

Knight did pass the time by typing:
> Hi all,
> I have a 1986 Cherokee Pioneer with the dreaded 2.5L I noticed while under
> the hood checking vacuum problems that I have a small blow by ...its around
> a sparkplug... have tried pulling the plug and cleaning around it and
> everything..no dirt or anothing there. Any idea's on how to fix this... With
> the blowby I am losing compression in turn losing power... any help would be
> great! Thanks in advance!!

swap plugs and see if the problem moves.
If so it's the plug that's cracked, if not it's
the threads.

That's the number one reason why a torque wrench should be used on sparkplugs.
I've seen several engines where a gorilla twisted the threads off.

Save-a-thread works
http://toolrage.com/prodView.asp?idproduct=1091
http://www.metricscrew-toolco.com/newpg1.html

Remember to use oil on the tap and remove/clean it
frequently. Any metal shavings in the cyl will be bad juju.

--
DougW

 

> That's the number one reason why a torque wrench should be used on
> sparkplugs.
> I've seen several engines where a gorilla twisted the threads off.

It also controls the stretch on the plug, which changes the gap and heat. I
didn't believe it until I tried plugs set by hand on an emissions machine,
then by torque wrench. It made a measurable difference.

--
Paul Calman, Hathaway Pines, California

 

> That's the number one reason why a torque wrench should be used on
> sparkplugs.
> I've seen several engines where a gorilla twisted the threads off.

It also controls the stretch on the plug, which changes the gap and heat. I
didn't believe it until I tried plugs set by hand on an emissions machine,
then by torque wrench. It made a measurable difference.

--
Paul Calman, Hathaway Pines, California

 

> That's the number one reason why a torque wrench should be used on
> sparkplugs.
> I've seen several engines where a gorilla twisted the threads off.

It also controls the stretch on the plug, which changes the gap and heat. I
didn't believe it until I tried plugs set by hand on an emissions machine,
then by torque wrench. It made a measurable difference.

--
Paul Calman, Hathaway Pines, California