How to diagnose rod knock vs valve train knock?? Sigh, tired of that car...

[c-ro]

my lock outs will be here tomorrow I let you know how it goes

 

[Corpo]

Tensioner bolt backed out. Possibly sheared the head off it. Pics to follow.

 

[avinaj80]

Tensioner bolt backed out. Possibly sheared the head off it. Pics to follow.

Hydro tensioner bolt? Uh oh...

 

[Corpo]

Hydro tensioner bolt? Uh oh...

Don't want to thread jack. Seems I have a different issue then paps.

http://www.s197forum.com/forum/showthread.php?t=113270

 

[crownaviation]

Why did you choose to use a stud? Looks like you are using the steel 2v tensioners..

OEM is a tty and torque to 18 ft-lbs. Not sure what a nut and stud combo would be or if ARP even sells a fastner for those specifically. I cringe when I think of a nut falling thru all the motor..

 

[Corpo]

Before I had a stock tensioner bolt actually shear off. I put new heads and cams on and reused my plastic tensioner. New bolt. After a summer one sheared.

So when I replaced it with the new engine I wanted something stronger. I couldn't find a stronger bolt, so I went stud.

And in both cases I have a nut/bolt head fall through the engine

On the bright side the stud is still holding the tensioner straight.

 

[crownaviation]

2step? Hit rev limiter often?

 

[Corpo]

Nope and nope. 127600's and heavy springs. Autox.. So the on and off the throttle probably doesn't help.

 

[Paps]

Just boroscoped cyl #6-7-8
Here is #6 but #7 looks the same

Cyl #8

Does #8 look like a PTV contact?

No broken followers, so bent valve? And my noise is coming from it?

Note: i'm not the first owner, and that piston looks new to me compared to others

 

[avinaj80]

Just boroscoped cyl #6-7-8
Here is #6 but #7 looks the same

Cyl #8

Does #8 look like a PTV contact?

No broken followers, so bent valve? And my noise is coming from it?

Note: i'm not the first owner, and that piston looks new to me compared to others

Run a leak down test. that would be the best way to find out...

 

[Paps]

Replaced cam phaser today, noise STILL there, out of idea......help please
Suggestions?

Gonna flush oil and....?

 

[dysan]

Mine made noises late last year and when I tore the engine down I found that the bolts the tensioner arms pivot on had both snapped..thank god I had the locking metal 2v tensioners otherwise it would probably have jumped timing.

If I was you I would pull the front cover and take a real good look.

 

[Corpo]

Mine made noises late last year and when I tore the engine down I found that the bolts the tensioner arms pivot on had both snapped..thank god I had the locking metal 2v tensioners otherwise it would probably have jumped timing.

If I was you I would pull the front cover and take a real good look.

+1

I'm just gonna leave this here...

http://www.s197forum.com/forum/showthread.php?t=113270

 

[Paps]

Mine made noises late last year and when I tore the engine down I found that the bolts the tensioner arms pivot on had both snapped..thank god I had the locking metal 2v tensioners otherwise it would probably have jumped timing.

If I was you I would pull the front cover and take a real good look.

Yeah next step

+1

I'm just gonna leave this here...

http://www.s197forum.com/forum/showthread.php?t=113270

Thanks! I already checked every single threads about ticking/knock noise!

 

[Corpo]

Yeah next step


Thanks! I already checked every single threads about ticking/knock noise!

I know you have bud. Just putting emphasis on the issue dysan was describing.

I guess me and dysan each have big cams though too.

 

[dysan]

I know you have bud. Just putting emphasis on the issue dysan was describing.

I guess me and dysan each have big cams though too.

Nah..I have baby cams....127300's with the mild Comp 26113 springs. The thing with me is I race my car every week and am on the 2-step every round so mine takes a beating from that. My current engine shouldn't have that issue though since the iron block I have uses solid pressed in pins for the tensioner arms so they don't have a sharp edge to break like the ones in the aluminum block.

If you have the plastic tensioners be sure to check the gaskets on them to make sure they haven't blown out like a lot of people have reported.

 

[Paps]

Noise is coming from cyl #7 -8, do you think that tensioners or front end components could cause this? Gonna take another vid today.

 

[Corpo]

For all the trouble you have been having. It can't hurt to pull the timing cover and inspect.

 

[crownaviation]

For all the trouble you have been having. It can't hurt to pull the timing cover and inspect.

Agree ^^^ It is that time

 

[Paps]

For all the trouble you have been having. It can't hurt to pull the timing cover and inspect.

Agree ^^^ It is that time

Will do, thanks!

Flushed oil today nothing wrong but only 4.5 quarts of oil and very very small metal particules