Loud boom and new banging

[inkedrose]

Changed plugs and fluids then went for test drive. Large boom then significant loss of power. Was able to limp it home but sounded like something was hitting metal to metal. No leaks, no smoke. Went to new iridium plugs. Going to pull plugs back out and start there. Where do I go from there?

 

[tr21triton]

damn sounds like you blew out a plug ! not good....

 

[Zorba]

Plug blew out?

 

[MountaineerTom]

Did it blow out the exhaust manifold or a cat?

 

[tr21triton]

Changed plugs and fluids then went for test drive. Large boom then significant loss of power. Was able to limp it home but sounded like something was hitting metal to metal. No leaks, no smoke. Went to new iridium plugs. Going to pull plugs back out and start there. Where do I go from there?

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sure hope you didn't use a German torque wrench when you put them in !

 

[inkedrose]

sure hope you didn't use a German torque wrench when you put them in !

No they're just over hand tight

 

[inkedrose]

Did it blow out the exhaust manifold or a cat?

Not sure, how can I tell?

 

[RMETeeJay]

Agree with @MountaineerTom that it sounds like exhaust related. What were you doing when it happened?

 

[inkedrose]

damn sounds like you blew out a plug ! not good....

What does that mean? I don't like the "not good" part

 

[tr21triton]

can be a pain and have to get a helicoid if it stripped the threads. have you checked them yet ? could of just blew the guts out of 1

 

[BlueC]

Not sure, how can I tell?

Feel around for exhaust leaks. With the way yours sounds, it will be obvious.

What does that mean? I don't like the "not good" part

Like the plug was physically blown out, i.e. stripped the hole (worse case) or maybe the plug came apart and blew the porcelain out (just need a new plug)

Went to new iridium plugs.

Were the new plugs the same length as stock?

 

[Hopper]

Does sound like it blew a plug. My 2003 250 did that alot. It was easy to find. It was the hole without a plug in it

 

[inkedrose]

Agree with @MountaineerTom that it sounds like exhaust related. What were you doing when it happened?

Jumped on highway, was excelerating

 

[inkedrose]

So I fucked up. Looks like I clamped cover back on crooked, plug was out when I pulled it off. How much other damage might have I caused?

 

[Hopper]

So I fucked up. Looks like I clamped cover back on crooked, plug was out when I pulled it off. How much other damage might have I caused?

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Just throw a new plug in and see if it holds. Hopefully you didn't strip the threads.

 

[inkedrose]

Were the new plugs the same length as stock?

Plug looks like it came out clean. Threads are still good. Same size

 

[SkylinesSuck]

Why is the strap smashed into the electrode?

 

[inkedrose]

Why is the strap smashed into the electrode?

When I clamped it down it must not have been on straight? IDK, looked good before

 

[BlueC]

So I fucked up. Looks like I clamped cover back on crooked, plug was out when I pulled it off. How much other damage might have I caused?

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Why is the ground strap smashed up?

 

[BlueC]

When I clamped it down it must not have been on straight? IDK, looked good before

I assume you're talking about the coil, which would not have any effect on the plug. Compare the length of the plug to one of the olds ones.

BTW that looks like a pretty hot plug. Is it the stock heat range?