I am continuing with the Boxer's overall major service /restoration and on inspecting the OEM exhaust system I have several thoughts and concerns. I am removing the old ? asbestos sandwiched shields which had multiple cracked spot welds and which would prevent good refinishing of the headers. One of the mufflers has some loose material that can be heard with tipping it side to side. Looking down the main outlet the perforated internal pipe appears to be intact with an inspection camera. I really don't want to replace it if this is ultimately a non-issue so my thoughts are to ignore it... Or cut it open and repair? I would appreciate any thoughts. Additionally, I am planning to have the headers black power coated with hi temp header coating, then I would wrap the appropriate region with modern heat shielding material such as used in turbo installations. I would appreciate any thoughts. Thanks
If the muffler didn't rattle in use then I wouldnt cut it open. Ceramic coat the headers not high heat powder because it'll burn off. I had it happen. You may still find you need to install a boot shield like what a 430 uses. I've made them and bolted them to the gearbox side supports because the factory metal shield welded to the headers is insufficient.
Thanks- I just finished removing the old heat shields and smoothing down the old tack welds. Next to ceramic coating. I really like the idea of a gear box attached heat shield as opposed to wrapping the headers. Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
Good day Ludwig, When I ceramic coated mine last Summer I went with Satin black. Interestingly, the Ceramic coater stated that this was the best color/finish for minimizing surrounding temps (which was my objective). As for white... my coater also said that they had bad experiences with white ceramic coating, as it would discolor over time. Just a heads up ... do not prep (i.e. sand blast, etc) the headers before going to the ceramic coaters. The coaters have their own metal preparation process and sand blasting, etc makes this task much harder. Cheers, Sam
Stainless steel would make a good heat shield. Stainless steel is a poor conductor of heat. It will help keep the heat off.
Just dropped them off to the ceramic coating folks and should have them back in 2 weeks- coating inside and outside. I will paint the mufflers resonators with VHT after blasting. The heat shield (yes stainless) will then be customized once I start to reassemble. I also dropped off all the suspension parts to be Zn-gold finished.
Thanks Paul, They haven't been treated yet-I'll speak to the blaster about the best finishing option to maintain the stainless finish
Hi Ludwig, Have you looked into - Nimbus g2 or g1 heat shield material? Nimbus GII® is an ultra-lightweight solution that provides superior thermal performance and the ability to accommodate complex product shapes. Features and benefits include: Corrugated aluminum ultra-low weight heat shield Up to 80% lower mass than aluminized steel shields 15-30% thermal protection improvement over aluminized steel Interlocked corrugation enables forming of single piece complex shapes Corrosion resistant and recyclable aluminum You can order Nimbus sheets online and shape it how you would like. Best Regards, GTTT
Try glass bead not sand. I did a set that way and they turned out fantastic. The cans are non-magnetic stainless but the donut flanges are mild steel unfortunately.
