nfonville Posted June 11, 2018 Report Posted June 11, 2018 I have an issue with the heat shielding on the air input duct on the right side. The exhaust is really close. I keep replacing the heat shielding cloth every oil change at 25 hours. It's looking pretty burned from heat. I'm using cloth rated to 2000 Fahrenheit. I've looked very closely for exhaust leaks and no exhaust soot is there. Is this a common issue? Quote
moxfox Posted June 11, 2018 Report Posted June 11, 2018 Right side sitting in the plane or right side looking from the front of the motor? Any pictures would be helpful?? Quote
nfonville Posted June 11, 2018 Author Report Posted June 11, 2018 passenger side. I wish I would have shot photos. I will next time when I open it up. It just dawned on me when I got home to post. Quote
Awful_Charlie Posted June 11, 2018 Report Posted June 11, 2018 I had assumed it was standard, but maybe it got put there by a previous owner: the inside of my intercooler duct is covered by a thin sheet of aluminium Quote
nfonville Posted June 11, 2018 Author Report Posted June 11, 2018 I was thinking about fabricating an aluminum shielding to be more permanent. Quote
FoxMike Posted June 12, 2018 Report Posted June 12, 2018 On the exhaust side of the intercooler duct you should have a thin piece of stainless riveted to the duct. On your airplane a careless mechanic probably destroyed it. Quote
LANCECASPER Posted June 12, 2018 Report Posted June 12, 2018 I don't have any aluminum or stainless on mine and there are no holes where rivets were, just the heat shielding cloth. Mine is serial number 27-0150. Quote
carusoam Posted June 12, 2018 Report Posted June 12, 2018 Cloth rated for 2k°F...? The hottest part of the exhaust might exceed that or get kind of close... the TIT is typically kept at 1650°F and that is further downstream than the exhaust headers all meeting... Either way 2000°F doesn’t leave enough of a safety factor... the TIT is probably the hottest measured point in the exhaust, not the hottest part of the exhaust system... PP thoughts only not a mechanic... Best regards, -a- Quote
nfonville Posted June 12, 2018 Author Report Posted June 12, 2018 Could someone that has the stainless shield please take a photo when they have their cowling off? Sounds like in the mean time, I need to find some 3k type cloth. Thanks, Neil Quote
N201MKTurbo Posted June 12, 2018 Report Posted June 12, 2018 https://www.thermotec.com/products/exhaust-insulating Quote
Awful_Charlie Posted June 25, 2018 Report Posted June 25, 2018 On 6/12/2018 at 4:52 AM, FoxMike said: On the exhaust side of the intercooler duct you should have a thin piece of stainless riveted to the duct. On your airplane a careless mechanic probably destroyed it. FoxMike is correct - it is stainless and not aluminium as I wrote earlier Lousy photo as I didn't want to disconnect hoses, so this it just easing the duct outwards to point the camera down the back - you can see it's not in the best of shape, and appears to be stuck on with RTV as well as a pop rivet or two Quote
nfonville Posted June 26, 2018 Author Report Posted June 26, 2018 Thanks for posting this photo. I see no evidence of there ever being a rivet installed on my intercooler ducting. Wonder if this was done on later models? Mine is a 1992. Looks like it could easily be fabricated. I'll look on the parts manual and see if there is a part number. Quote
thinwing Posted October 15, 2018 Report Posted October 15, 2018 It is .020 stainless sheet...hopefully kept polished and clean to act as a reflector Quote
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