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Meggypeggs
Samba Member
Joined: May 19, 2019
Posts: 17
Location: cheshire
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 Posted: Thu Jul 22, 2021 5:48 am Post subject: Muffler getting hot |
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Hi
Driving a 1600 bug which has a single 30pict carb and recently put on muffler (as my old one didn’t fit as I ran dual carbs).
After a five minute drive the muffler gets that hot that I can feel the heat through the valance at the back. I swear it’s causing the paint to bubble and crack. Really concerned and wondered if it was normal? If so how do you go about protecting other areas from heat?
Car has been tuned and is running fine apart from this concern.
Thank you for your time.
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lboos
Samba Member
Joined: November 20, 2015
Posts: 410
Location: Marietta GA.
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| Posted: Thu Jul 22, 2021 7:04 am Post subject: Re: Muffler getting hot |
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| My muffler runs 375 f on a day with the temp. at 88 f, everything stock, 1600 engine, after 30 min. drive, temp. taken at idle. |
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Starbucket
Samba Member
Joined: April 30, 2007
Posts: 4025
Location: WA
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| Posted: Thu Jul 22, 2021 1:14 pm Post subject: Re: Muffler getting hot |
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| Make a heat shield for it or wrap it with cermic header tape. It will bubble your paint without something. |
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Pruneman99
Samba Member
Joined: February 22, 2012
Posts: 5013
Location: Oceanside
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| Posted: Thu Jul 22, 2021 1:47 pm Post subject: Re: Muffler getting hot |
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Double check your timing. If unburned fuel is burning in the exhaust, it will drastically raise the temps of the muffler. You might need to advance it a few degrees.
Also, if you're really rich, it can cause.that too. |
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Raymond73
Samba Member
Joined: March 07, 2010
Posts: 390
Location: PA
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| Posted: Thu Jul 22, 2021 2:34 pm Post subject: Re: Muffler getting hot |
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Dumb question as I was just messing around with my own tailpipes, but your's are properly installed, correct? Thinking that if they are too far in the exhaust/heat will have no where to go and might contribute to your problem.
_________________
'70 Auto Stick Beetle
113 905 205AD
30 PICT-3 |
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Meggypeggs
Samba Member
Joined: May 19, 2019
Posts: 17
Location: cheshire
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| Posted: Thu Jul 22, 2021 3:43 pm Post subject: Re: Muffler getting hot |
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| Raymond73 wrote: |
| Dumb question as I was just messing around with my own tailpipes, but your's are properly installed, correct? Thinking that if they are too far in the exhaust/heat will have no where to go and might contribute to your problem. |
I followed the advice of someone who stated that the pipes should be in at a certain point. I’ve not shoved them in to the bottom. I will however look up to see what depth they should be in. Thank you. |
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Meggypeggs
Samba Member
Joined: May 19, 2019
Posts: 17
Location: cheshire
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| Posted: Thu Jul 22, 2021 3:45 pm Post subject: Re: Muffler getting hot |
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| Starbucket wrote: |
| Make a heat shield for it or wrap it with cermic header tape. It will bubble your paint without something. |
I will look for some. My concern is that it’s heating up the engine too as they are connected. Will look for some thank you. |
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raydog
Samba Member
Joined: February 09, 2006
Posts: 1163
Location: Cape Cod
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| Posted: Thu Jul 22, 2021 4:12 pm Post subject: Re: Muffler getting hot |
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Check timing, mixture, cooling, and all things related, but mufflers do get hot. Aftermarket rear apron?
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Come on, It's not rocket science. KISS |
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bomberbob
Samba Member
Joined: May 17, 2015
Posts: 688
Location: Iowa
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| Posted: Fri Jul 23, 2021 4:29 am Post subject: Re: Muffler getting hot |
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How can it get that hot? There is that inner second layer of metal inside the apron, wouldn't that insulate from some of the heat?
_________________
1968 Beetle (storage)
1990 Jetta GLI megasquirted, burning E85 (currently in heavy maintenance)
2004 Jetta turbo GLI
Marion, Iowa |
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Meggypeggs
Samba Member
Joined: May 19, 2019
Posts: 17
Location: cheshire
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| Posted: Fri Jul 23, 2021 5:44 am Post subject: Re: Muffler getting hot |
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I will get some heat shield for it.
Dum question sorry. Am I right in thinking I wrap the muffler or the areas that get hot around the muffler? |
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Starbucket
Samba Member
Joined: April 30, 2007
Posts: 4025
Location: WA
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| Posted: Fri Jul 23, 2021 6:32 am Post subject: Re: Muffler getting hot |
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| You can get a piece of 6" stove pipe and cut it with tin snips and make two spacers 3/8" thick and use two hose clamps to hold it all in place. If you use header wrap that will keep the heat inside and not let it radiate. You wrap it and hold it in place with hose clamps or wire and the heat will make it bond together. |
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lboos
Samba Member
Joined: November 20, 2015
Posts: 410
Location: Marietta GA.
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| Posted: Fri Jul 23, 2021 6:49 am Post subject: Re: Muffler getting hot |
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Meggypeggs,
Again, how hot is hot ? what you think as hot might be normal, you said you put on a new muffler, it's going to smell diff. for a few hours, what paint are you talking about that it's causing to bubble and crack ? on the muffler or on the car ? you need to get a therm. temp. gun, they are not too exp. and to compare with another bug or someone here on the forum, everyone has a diff. opinion on what is too hot,.
If you car is running like it should, I would just drive it.  |
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