H3 Heat shield bolt broke

[altide8]

So I went to tighten the heat shield in hopes of getting rid of the annoying rattle. I turned the bolt near the sensor slightly and it snapped off. Now I have no idea what to do.


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[JPaul]

Will a hose clamp fit around it? That'd hold it down fine and not rust away.

 

[altide8]

Will a hose clamp fit around it? That'd hold it down fine and not rust away.

Unfortunate not. The bolt is broken flush with the hole in the heat shield. I can't push it in enough to expose the bolt for a hose clamp.


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[USMC_TOP]

Got room for a drill and easy out it?


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[JPaul]

I meant around the manifold, not the bolt.

 

[altide8]

I meant around the manifold, not the bolt.

I don't think so. Seems a bit too big.



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[USMC_TOP]

How much do we really need these heat shields? When mine goes I plan on leaving it gone


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[JPaul]

https://www.lowes.com/pd/Cambridge-...12-1-4-in-Dia-Steel-Adjustable-Clamps/4561962

Fits up to 12" diameter pipes (or exhaust manifolds in this case). You can get hose clamps in a large range of sizes.

 

[altide8]

How much do we really need these heat shields? When mine goes I plan on leaving it gone


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That's the exact question I'm wondering


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[altide8]

https://www.lowes.com/pd/Cambridge-...12-1-4-in-Dia-Steel-Adjustable-Clamps/4561962

Fits up to 12" diameter pipes (or exhaust manifolds in this case). You can get hose clamps in a large range of sizes.

I'll for sure try that out tomorrow. Thanks


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[Paranormal]

If it is flush with the heat shield, there may be a small amount of the stud visible once you remove the shield. Try spraying and then see if you can manage to get a good pair of vice grips on it and try removing it. I know that it is easier said than done but try. I just replaced my exhaust manifold and that bolt is a PIA.

 

[alrock]

How much do we really need these heat shields? When mine goes I plan on leaving it gone
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To answer a question with a question - how much more heat would you like to introduce into the engine compartment of these already hot-running vehicles? I prefer to get rid of any heat that I can in the engine compartment and that heat shield will help push the heat downstream.

 

[USMC_TOP]

Good point rock


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[rascole]

Take it off. Did it to mine a few years ago. The heat wasn't noticeable in the engine compartment.

 

[Bruces]

Put a nut over the remaining stud, tack it in place then add a new stud to the remaining nut.

yours looks like mine where the other hole cracked and broke out as well. I put fender washers on both sides before reinstalling and it holds just fine. No rattles

 

[santafeh3]

Think My Exhaust Manifold Is Cracked

I think my exhaust manifold is cracked or something. A friend who owns a muffler shop 25 years had it on the hoist and both of us looked and listened but didn't appear the exhaust pipes Etc were loose that was with a little "noise). Took it down the road, something "popped" and then the truck sound. I figured I would take the heat shield off so I could see if the manifold was cracked. bolt broke off etc.

I got the 3 nuts off finally but can't get the shield out. I think I could but the auto trans check tube is in the way. How do you take the tube out or is there other secrets. Thanks for a prompt reply Paranormal or anyone. Taos, New Mexico.

If it is flush with the heat shield, there may be a small amount of the stud visible once you remove the shield. Try spraying and then see if you can manage to get a good pair of vice grips on it and try removing it. I know that it is easier said than done but try. I just replaced my exhaust manifold and that bolt is a PIA.

 

[delta88]

I think my exhaust manifold is cracked or something. A friend who owns a muffler shop 25 years had it on the hoist and both of us looked and listened but didn't appear the exhaust pipes Etc were loose that was with a little "noise). Took it down the road, something "popped" and then the truck sound. I figured I would take the heat shield off so I could see if the manifold was cracked. bolt broke off etc.

I got the 3 nuts off finally but can't get the shield out. I think I could but the auto trans check tube is in the way. How do you take the tube out or is there other secrets. Thanks for a prompt reply Paranormal or anyone. Taos, New Mexico.

My exhaust manifold shield was eroded so I used sheet metal nibblers to cut it half down the center. Then nibbled-out a space around the o2 sensor and was able to remove it very easily without messing with the AC lines and surrounding things. Turns out my rattle wasn't the manifold heat shield but the catalytic converter inside the manifold.

 

[santafeh3]

Cracked Exhaust Manifold?? No.

After getting the heat shield pulled a little ways away, the manifold looked ok so onto the creeper and under the truck. Took photos and to my friend at the muffler shop. It looks like the top of the cat separated. He said if I could see if there is a flange on the top of the cat and if I could get the cat off he may be able to weld around it.

I really like your idea delta88 about cutting the heat shield in half and taking it off that way. I can get the ox sensor off but I don't see anyway to get the shield off without dealing with the AC. From under neath it looks like there could be a slim chance I can turn it in towards the motor and see if I can kind of wrap it around. I left the beast for tonight. I'll do more research and start again in the morning. I bought my H3t about 6 weeks ago. I love the truck - the 3.7 I think is a bit of a dog but then some of the problem may be problem ox sensors, MAF and a few other things. The previous owner said he had changed the plugs at 100,000 - now has 116,000. My mileage really sucks - 10-12 around towns with a light foot. If anyone has ideas about the gas mileage point me to another thread.

Thanks for your replies. Just a newb so need some help and anything at this point is appreciated.

My exhaust manifold shield was eroded so I used sheet metal nibblers to cut it half down the center. Then nibbled-out a space around the o2 sensor and was able to remove it very easily without messing with the AC lines and surrounding things. Turns out my rattle wasn't the manifold heat shield but the catalytic converter inside the manifold.

 

[santafeh3]

LATE last night I'm back under the beast and after a lot of wriggling around, I shine my flashlight upwards and see that there is no "nut" on the end of the last "bolt" on either end of the manifold. Not broken, just seeing the threads.

I'm going to cut the heat shield off like delta88 did and am wondering if "wrapping" the manifold would be the same, better or worse than putting another heat shield on since I would remove the manifold, install new gasket etc., and put it back on. OR, can you even wrap a cast manifold - I know you can but is it a good idea or do just not wrap cast iron - just trying to get away from spending 3 hours trying to get another heat shield on.

I did a search for headers and found info on Magnaflo and am wondering (pocket book is very slim these days) if since I have all this stuff apart if that is a wise investment. And, new ox sensors etc since I have this thing apart.

I do apologize for hijacking this thread. Please, nice flames if you're going. Thanks for any advice / info - trust me, I do need it.

 

[rascole]

I had the same issue and tossed the heat shield in the trash. No wrap, just bare naked manifold. I have never had any heat issues as a result now for several years.

 

[delta88]

I'm going to cut the heat shield off like delta88 did and am wondering if "wrapping" the manifold would be the same, better or worse than putting another heat shield on since I would remove the manifold, install new gasket etc., and put it back on. OR, can you even wrap a cast manifold - I know you can but is it a good idea or do just not wrap cast iron - just trying to get away from spending 3 hours trying to get another heat shield on..

Here's what I used:

Nibblers- http://www.ebay.com/itm/252262484389

DIY Heatshield- http://a.co/ew1quVq

I personally would not wrap the manifold with the lava / fiber glass tape. Wrapping traps the heat and it'll transfer further down your exhaust pipe perhaps causing other problems. The shield is just that, to guard the surrounding coolant lines / wiring from radiant heat. The DIY stuff is better than the stock manifold heat shield IMHO because it's flexible and probably lasts longer and does a better job.

 

[JPaul]

I'm pretty sure you don't want to wrap cast iron manifolds, the excessive heating they'll get can cause them to warp and crack is my understanding. The heatshield still allows them to radiate off excess heat but keeps it away from surrounding parts that could be damaged by the amount of heat coming off of them. Steel tube headers on the other hand can handle the heat when wrapped.

 

[Paranormal]

The dipstick is held in place by one bolt. Remove the bolt and pull up on the dipstick, it'll come out. You can go to an auto parts place and buy yourself an O2 sensor tool for about $12. Undo the O2 sensor plug, unscrew the sensor with your new socket, remove the dipstick and after a few tries, you'll be able to take the heat shield out from the top.

 

[delta88]

The dipstick is held in place by one bolt. Remove the bolt and pull up on the dipstick, it'll come out. You can go to an auto parts place and buy yourself an O2 sensor tool for about $12. Undo the O2 sensor plug, unscrew the sensor with your new socket, remove the dipstick and after a few tries, you'll be able to take the heat shield out from the top.

Forgot about the trans tube dip stick, mine was a 5 speed MANual. Even without the trans tube in the way my 09 had a bunch other things in the way to simply just pull it up and out.

 

[Paranormal]

Forgot about the trans tube dip stick, mine was a 5 speed MANual. Even without the trans tube in the way my 09 had a bunch other things in the way to simply just pull it up and out.

It does not simply come out. That's why I said after a few tries.When I finally worked mine out, I was shocked on how easy it came out. It had to be positioned perfectly. My hands were pretty beat up but it finally came out. A/C lines were also a little snug but the shield bends a little.