Engine Blew!

[Irace86.2.0]

Originally Posted by BrahmaBull1990

Love this thread! Keep it coming!

This thread will be done for me when I finish separating the block. I’ll make a new build thread in the Swaps subforum.

[Irace86.2.0]

If anyone knows the answer to this then help me out.

https://www.ft86club.com/forums/showthread.php?t=145203

[FR-S2GT86]

Originally Posted by Irace86.2.0

I thought about it, but there are many reasons why that would be a bad idea for me. One, I need a car, and my interests are limited. I like the gen 1 86 but I would be interested in the gen 2 motor. The other car is a used 911 or Cayman, but I’m not ready for something older or more expensive. I’d look at used Lotuses, but there are practically none, so they are overpriced. I’d take a used Jannarelly, but they don’t exist. A used Miata RF would be a strong contender, but a new car will just lead me down the mod route even more. The second reason is this car is developed enough that once the engine is installed, I’ll be content enough to get me through nursing school without thinking about the mods. Third, I’ve pit so much into the car that I’ll take too much of a loss on the sale. Fourth, the car gets used, so it isn’t pristine enough, which means most would rather buy something cleaner than pay for a used car with tasteful mods. Fifth, the car is paid off, so I would rather not have to sell and then buy and then mod and then be paying more in the long run. Finally, I have some attachment to this car. It is my car that has been really good to me, so I’m not ready to break up.

I never knew one could be codependent to an automobile.

[jflogerzi]

Originally Posted by Irace86.2.0

I thought about it, but there are many reasons why that would be a bad idea for me. One, I need a car, and my interests are limited. I like the gen 1 86 but I would be interested in the gen 2 motor. The other car is a used 911 or Cayman, but I’m not ready for something older or more expensive. I’d look at used Lotuses, but there are practically none, so they are overpriced. I’d take a used Jannarelly, but they don’t exist. A used Miata RF would be a strong contender, but a new car will just lead me down the mod route even more. The second reason is this car is developed enough that once the engine is installed, I’ll be content enough to get me through nursing school without thinking about the mods. Third, I’ve pit so much into the car that I’ll take too much of a loss on the sale. Fourth, the car gets used, so it isn’t pristine enough, which means most would rather buy something cleaner than pay for a used car with tasteful mods. Fifth, the car is paid off, so I would rather not have to sell and then buy and then mod and then be paying more in the long run. Finally, I have some attachment to this car. It is my car that has been really good to me, so I’m not ready to break up.

I understand and I would be in the same boat as you if my engine popped.

Sent from my GM1915 using Tapatalk

[ermax]

Originally Posted by Breadman

Do you have an oil pressure gauge? The rocker failure happens from oiling issues or over revs. Id question the oiling since you have gasket maker on the camshaft but having a piston fly into the valves when you broke a rod would also do it. Which reminds me i need to buy my oil pressure gauge for my new engine

I was under the impression the rocker eject feature on the FA20 was totally random and not necessarily caused by over revs or oil pressure. I thought the rocker eject issue was mostly fixed mid 2014 though.

[Breadman]

Originally Posted by ermax

I was under the impression the rocker eject feature on the FA20 was totally random and not necessarily caused by over revs or oil pressure. I thought the rocker eject issue was mostly fixed mid 2014 though.

My 2017 says otherwise. But I also probably has an oiling issue

[BRZoomTX]

Originally Posted by ermax

I was under the impression the rocker eject feature on the FA20 was totally random and not necessarily caused by over revs or oil pressure. I thought the rocker eject issue was mostly fixed mid 2014 though.

That is mostly related to the valve spring recall. The rockers in later motors can still lift and cause damage. Aftermarket valve springs can help but they do not fix the flaw.

Refer here for an upcoming public solution:

https://www.ft86club.com/forums/showthread.php?t=142047

[NoHaveMSG]

Originally Posted by BRZoomTX

That is mostly related to the valve spring recall. The rockers in later motors can still lift and cause damage. Aftermarket valve springs can help but they do not fix the flaw.

Refer here for an upcoming public solution:

https://www.ft86club.com/forums/showthread.php?t=142047

It’s not related to the recall. 2014 and up engines have longer valves and deeper pockets in the rocker arms for the pivot.

Mine was neither oil pressure or over rev. I think it’s mostly a geometry issue with the valve train


Sent from my iPhone using Tapatalk

[Irace86.2.0]

So my rocker arms could have jolted loose when I took a switchback and some bumps with one big bump at the end. If they came loose at that time then you guys are saying I would have lost pressure instantly if the pivot came out (see below). FWIW, the pivots did not come out at all. In fact, they were completely seated in position.

https://www.ft86club.com/forums/show...10&postcount=4

Oh shit! I just realized I have this whole event on dash came video! I totally forgot!

I’m going to go get it.

[NoHaveMSG]

Originally Posted by Irace86.2.0

So my rocker arms could have jolted loose when I took a switchback and some bumps with one big bump at the end. If they came loose at that time then you guys are saying I would have lost pressure instantly if the pivot came out (see below). FWIW, the pivots did not come out at all. In fact, they were completely seated in position.

https://www.ft86club.com/forums/show...10&postcount=4

Oh shit! I just realized I have this whole event on dash came video! I totally forgot!

I’m going to go get it.

That’s wild the pivot stayed in place. Mine did a bunch of damage to the bore they sat in when it came out and got whacked by the cam lobe.


Sent from my iPhone using Tapatalk

[BRZoomTX]

Originally Posted by NoHaveMSG

It’s not related to the recall. 2014 and up engines have longer valves and deeper pockets in the rocker arms for the pivot.

Mine was neither oil pressure or over rev. I think it’s mostly a geometry issue with the valve train


Sent from my iPhone using Tapatalk

I was referring to the general design flaw of the rockers. It was worded poorly, sorry.

My understanding on the springs is it was a production adjustment in mid 2013 to 2014, and the other valvetrain part numbers weren't changed until 2015 with the harness, sensors, etc. I double checked and you are correct, the part numbers were changed for 2014 and the other changes in 2015+.

I've owned a '13 and a '16 but not in between, so not completely aware of the years beyond knowing about the differences being there.

The valve spring recall contributes a lot to the higher failure rate in '13s, but the general design was still never significantly changed. Aftermarket valve springs can help better secure them (stronger), but obviously it does not prevent the problem. I agree with you, the design of them is flawed, and I would recommend running keepers for all year FA20's.

[ermax]

Originally Posted by BRZoomTX

I was referring to the general design flaw of the rockers. It was worded poorly, sorry.

My understanding on the springs is it was a production adjustment in mid 2013 to 2014, and the other valvetrain part numbers weren't changed until 2015 with the harness, sensors, etc. I double checked and you are correct, the part numbers were changed for 2014 and the other changes in 2015+.

I've owned a '13 and a '16 but not in between, so not completely aware of the years beyond knowing about the differences being there.

The valve spring recall contributes a lot to the higher failure rate in '13s, but the general design was still never significantly changed. Aftermarket valve springs can help better secure them (stronger), but obviously it does not prevent the problem. I agree with you, the design of them is flawed, and I would recommend running keepers for all year FA20's.

But it was significantly changed. As already stated the geometry changed along with the oil hole in the pivot getting smaller which would create additional lift which in theory would keep the rockers in place better.

[ermax]

Originally Posted by Breadman

My 2017 says otherwise. But I also probably has an oiling issue

I wasn’t suggesting an over rev or low pressure wouldn’t also cause an eject, I’m simply saying an eject doesn’t automatically point to an over rev or pressure.

[Irace86.2.0]

I just ordered replacement hoses and the busted wiring loom from Harrop for $153, which isn’t bad. Those will come from Australia, so 3-6 weeks is when I will be able to post the supercharger for sale.