Oil Leak in Spark Plug?
Race Director
Joined: Oct 2004
Posts: 12,864
Likes: 4,669
What I mean by threads breaking into the intake ports is pretty simple. The threaded/tapped holes that mount the rocker arms are tapped to a specific depth. When the ports are enlarged while porting them the ports can actually break into/expose the rocker hold down threads. The threads would then be exposed to vacuum. Lots of oil up by the rockers. When exposed to vacuum oil can be sucked into the ports and drawn into the combustion chamber.......
Thread Starter
Intermediate
Joined: Dec 2024
Posts: 25
Likes: 0
What I mean by threads breaking into the intake ports is pretty simple. The threaded/tapped holes that mount the rocker arms are tapped to a specific depth. When the ports are enlarged while porting them the ports can actually break into/expose the rocker hold down threads. The threads would then be exposed to vacuum. Lots of oil up by the rockers. When exposed to vacuum oil can be sucked into the ports and drawn into the combustion chamber.......
Team Owner
Joined: May 2001
Posts: 87,404
Likes: 1,595
From: Western NY
After you remove the intake manifold, which, by the way, doesn't look anything like an OE manifold, based on the video that you posted, you can look down into the intake ports, and if the rocker stand bolt holes are exposed, you'll be able to see them. What you should see, is an uninterrupted, relatively smooth surface. Any deviations, especially ones that are at the "top surface" of the port, would be indications that the valve train bolt holes have "broken through"....
Thread Starter
Intermediate
Joined: Dec 2024
Posts: 25
Likes: 0
After you remove the intake manifold, which, by the way, doesn't look anything like an OE manifold, based on the video that you posted, you can look down into the intake ports, and if the rocker stand bolt holes are exposed, you'll be able to see them. What you should see, is an uninterrupted, relatively smooth surface. Any deviations, especially ones that are at the "top surface" of the port, would be indications that the valve train bolt holes have "broken through"....
Thread Starter
Intermediate
Joined: Dec 2024
Posts: 25
Likes: 0
Well I tried removing the valve springs today, first my 8mm socket snapped loosening the rocker bolts - so I had to go out and buy a new one. Then my spring compressor tool managed to cross thread so it's barely usable and then when I finally compressed my first spring the keeper launched sky high and will never be seen again.
I am not enjoying this mechanic work so far.
I am not enjoying this mechanic work so far.
Le Mans Master
Joined: Jul 2010
Posts: 6,021
Likes: 727
Well I tried removing the valve springs today, first my 8mm socket snapped loosening the rocker bolts - so I had to go out and buy a new one. Then my spring compressor tool managed to cross thread so it's barely usable and then when I finally compressed my first spring the keeper launched sky high and will never be seen again.
I am not enjoying this mechanic work so far.
I am not enjoying this mechanic work so far.
Le Mans Master
Joined: Jul 2010
Posts: 6,021
Likes: 727
Well I tried removing the valve springs today, first my 8mm socket snapped loosening the rocker bolts - so I had to go out and buy a new one. Then my spring compressor tool managed to cross thread so it's barely usable and then when I finally compressed my first spring the keeper launched sky high and will never be seen again.
I am not enjoying this mechanic work so far.
I am not enjoying this mechanic work so far.
Tech Contributor
Joined: Jan 2007
Posts: 19,493
Likes: 1,178
From: Dyer, IN
Well I tried removing the valve springs today, first my 8mm socket snapped loosening the rocker bolts - so I had to go out and buy a new one. Then my spring compressor tool managed to cross thread so it's barely usable and then when I finally compressed my first spring the keeper launched sky high and will never be seen again.
I am not enjoying this mechanic work so far.
I am not enjoying this mechanic work so far.
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Thread Starter
Intermediate
Joined: Dec 2024
Posts: 25
Likes: 0
I rotated the the crankshaft so the cylinder im working on is TDC so the valves can't fall more than an inch or two.
I use a borescope to make sure the cylinder is at the top. I felt so prepped for this job and its failed fantastically. Being in the UK the parts I need likely won't arrive until after Christmas.
I use a borescope to make sure the cylinder is at the top. I felt so prepped for this job and its failed fantastically. Being in the UK the parts I need likely won't arrive until after Christmas.
Tech Contributor
Joined: Jan 2007
Posts: 19,493
Likes: 1,178
From: Dyer, IN
I rotated the the crankshaft so the cylinder im working on is TDC so the valves can't fall more than an inch or two.
I use a borescope to make sure the cylinder is at the top. I felt so prepped for this job and its failed fantastically. Being in the UK the parts I need likely won't arrive until after Christmas.
I use a borescope to make sure the cylinder is at the top. I felt so prepped for this job and its failed fantastically. Being in the UK the parts I need likely won't arrive until after Christmas.
Team Owner
Joined: May 2001
Posts: 87,404
Likes: 1,595
From: Western NY
I rotated the the crankshaft so the cylinder im working on is TDC so the valves can't fall more than an inch or two.
I use a borescope to make sure the cylinder is at the top. I felt so prepped for this job and its failed fantastically. Being in the UK the parts I need likely won't arrive until after Christmas.
I use a borescope to make sure the cylinder is at the top. I felt so prepped for this job and its failed fantastically. Being in the UK the parts I need likely won't arrive until after Christmas.
Thread Starter
Intermediate
Joined: Dec 2024
Posts: 25
Likes: 0
Burning Brakes
Joined: Nov 2013
Posts: 1,174
Likes: 529
"LS2 Ported Heads" doesn't mean much.
Look at these images of LS2 ported heads. Do you see any red ones?
Maybe it's just me but I like to be sure the replacement parts are going to fit BEFORE I start the job. It annoys me to take the thing apart only to find out I have to order new parts because what was supposed to fit, didn't.
Look at these images of LS2 ported heads. Do you see any red ones?
Maybe it's just me but I like to be sure the replacement parts are going to fit BEFORE I start the job. It annoys me to take the thing apart only to find out I have to order new parts because what was supposed to fit, didn't.
Stock LS2 heads (799) ported and painted red by the previous owner? lmao. Such a hard concept to grasp. Jesus
Race Director
Joined: Oct 2004
Posts: 12,864
Likes: 4,669
Well I tried removing the valve springs today, first my 8mm socket snapped loosening the rocker bolts - so I had to go out and buy a new one. Then my spring compressor tool managed to cross thread so it's barely usable and then when I finally compressed my first spring the keeper launched sky high and will never be seen again.
I am not enjoying this mechanic work so far.
I am not enjoying this mechanic work so far.
Thread Starter
Intermediate
Joined: Dec 2024
Posts: 25
Likes: 0
Those M8-1.25 rocker bolts can be bitchy to loosen sometimes. I use a 6 point impact socket. Several years ago my wife was in the garage doing something when I broke one loose with a resounding "CRACK." She jumped and said man, what was THAT?? She thought I broke something.