Made my own Stainless CV boot heat shields

Nice job!

 

Nice fabrication.

Half the problem it looks like you have is the y pipe touching the heatshields. On the 2.7 there is not much room at all between the y pipe and the axle heat shields. I carefully adjusted my mounts so there is more room to clear the y pipe and also taking care not to bring the shields too close to the cv boots. No more issues and they hold up well.

Something to look for as being metal if these touch it will rattle as opposed to wear away like the fiberglass.

 

Bend the bracket down there can be plenty of room. Until I did that I was always rubbing.

 

Did the same thing years ago but with aluminum over the originals.

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@treedee3d

W.T.F. ?? I love Canada. I love hockey. (Patrick Roy, FTW!) I like Molson. But dang....this stuff in April just sucks the life out of a person.

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That's to keep the beer cold, Daniel. They don't have refrigerators up there is the cold north.

 

These aren't going to be much more effective than the factory shields. The factory shields only protect the tops of the boots from the Y-pipe, leaving the boots unshielded from the heat coming from the lower primary exhaust pipe. The advantage of the Goth shields wasn't that they were made out of stainless, it was that they wrapped down around the axle and shielded the boot from *both* pipes. I tried to find Goth shields and couldn't, and fabbed similar ones out of thin galvanized sheet metal and covered it with modern heat shielding. Doesn't look as pretty but my boots will probably last a long time.

This video (not mine obviously) shows pretty well how the factory shields only address part of the problem.

 

There was a very interesting/informative article on Chat from someone who was very familiar with thermal dynamic. I couldn't find the link. Was a good read on how to protect parts from heat degradation. Do a search you might have better luck than me.

 

You can really easily add material to your shields that wraps down on both sides of the axle. Could use rivets or short fasteners. Then cover the whole thing with adhesive-backed shielding from DEI so it looks good. Do it!

 

Here, dug up a couple of pics. I built an additional shield that sits on top of the factory shield. They're a little crude but the upside is I'm pretty sure I'm not going to have to change out my CV boots anytime soon. They were last changed during the major the PO did on my car a few hundred miles before I bought it and you can see in the second pic the old caked on grease around the CV joint from multiple past boot failures. Second pic is a side view with the shield installed that shows how far down it extends to protect the boot.
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Has anyone got a pair of goth shield or similar for sale? Im tired of replacing my CV boots every few years.

 

I was getting through CV boots alarmingly fast, always right hand side, left side seemed to last indefinitely. Anyway, messed about with various heat shield solutions but in the end, the single best thing I did was to wrap the exhaust in that area with heat shield wrap. Never had another CV boot go since and that was over 10 years ago.

there are tons of options of wrap (I don’t remember what brand I used, got it from a local race shop) anyway, here’s an example:

https://www.amazon.com/Design-Engineering-010131-Titanium-Technology/dp/B0039Z1UHA/ref=m_pd_aw_vtp_sccl_4/133-5508199-8998444?pd_rd_w=4L1qQ&content-id=amzn1.sym.b8794477-21f6-4384-8a41-3f4639665fd0&pf_rd_p=b8794477-21f6-4384-8a41-3f4639665fd0&pf_rd_r=16R4XGN1B4JGGTQ8G3EP&pd_rd_wg=acm5u&pd_rd_r=09d251b8-11a5-4bed-a7b4-cee5314ac56f&pd_rd_i=B0039Z1UHA&psc=1

 

Goth was mentioned in a recent post, perhaps he has an additional pair? Love mine, been in place for years.

 

yes, exactly the same with mine, always the right hand side. Thank you for the tip! How much of the exhaust do you wrap? Do you wrap the cat or just the pipe before it gets to the cat?

 

Is he still around? i cant seem to find him.

 

My theory on the reason for the right hand boot getting cooked is that the RH side is more “congested” than the left side with the alternator and oil tank restricting the airflow making it generally hotter. LH side is more “open” and gets better airflow — just a theory.

But anyway, to answer your question, I have wrapped the area from approx 10cm ahead of the driveshaft up to and including the catalyst flanges. I used the stainless steel zip ties just after the flanges to get the wrap good & tight. I didn’t wrap the catalysts. As I say, I got >10 years out of the last set of boots compared to one summer of hard driving “un-wrapped”.

I just recently changed the boots “while I was in there” but they didn’t really need it.

 

Hi,
I also did something similar on my 5.2:
- I added fiberglass enforced aluminum insulation sheet onto the original covers
- I added insulation on the main cat inlet flange

(I know on the picture the CV boot is damaged - it was already before the modification)

Best regards
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Thanks Guys (Spaghetti and Salbrech) for your posts, im going to add some wrapping to try and stop my CV boots from melting. Appreciate the help guys.

 

Had to chime in on this one and share my experience,
Standard headers still good and had to replace motor mounts and CV. Found an aftermarket custom header set on Eurospares in UK and decided to have it sprayed zircotec performance white on its way back to the US for the header swap out.

Sent the downstream components minus the Tubi to Swaintech in NY for their white lightning coating. Both hit with black high temp paint before install. Both very durable with the Swaintech thick and rough on the surface. Not like paint but more like molten ceramic shot through a plasma gun:


Very noticeable difference to the temps in the engine compartment especially after shutdown.

I also picked up some self adhesive zircoflex and crudely covered some of the vulnerable parts for extra insurance with the scraps from my covering another heat shield in the product. It has lasted very well with no component failures. Research it as they have added new products and wraps. Very high heat reflection rates.
https://zircotec.com/products/heat-shields/zircoflex-shield/

aircraft spruce sells zircoflex sheets in the US.

both Swaintech and Zircotec companies very nice to work with and professional. Zircotec is in most F1 cars and industrial applications as well.

for this OPs application, a self adhesive Zircoflex in the desired locations should shield the components. Added to a heat shield and it would be very good protection. They advertise 65-85% thermal reduction depending on which zircotec foil you use.

 

@ssnowball and all others would have Goth shields:

Anyone willing to take some comprehensive measurements?

Will use 16 ga stainless like treedee3d unless someone has a better idea?