Fd3s exhaust manifold
11-15-16, 12:10 PM
#1
Fd3s exhaust manifold
I'm about to install bnr twins, but my exhaust manifold and turbo heat shield was shot, completely rusted out. The bnr's are ceramic coated. Should I get new shielding for the manifold, send it to get ceramic coated, or would running without shields be much of an issue?
11-18-16, 06:20 AM
#3
You asked, so I think you already know the answer. Get replacement shielding or have them ceramic coated. Even with the shielding/coating they're a huge source of underhood heat. Without either you'll literally be broiling hoses, plastics, solenoids, check-valves etc.
11-18-16, 10:37 AM
#5
I doubt many have installed the manifold without shielding so you may not get a lot of alternatives that have been tested. If yours aren't usable you might try posting a WTB ad in the 3rd gen parts for sale section.
FWIW my OEM shielding was pretty crusty in spots but I wire-wheeled it in bad areas and used a sanding pad on the rest before spraying it with the DEI ceramic sealer/paint. That was about eight years ago and those shields still look just like they do here.
FWIW my OEM shielding was pretty crusty in spots but I wire-wheeled it in bad areas and used a sanding pad on the rest before spraying it with the DEI ceramic sealer/paint. That was about eight years ago and those shields still look just like they do here.
Last edited by Sgtblue; 11-18-16 at 11:11 AM.
11-20-16, 08:40 AM
#6
Just happened to look at the picture again of your manifold in place and noticed what look to be nyloc nuts holding the lower intake manifold. If so, I don't think that's factory. And I gotta think they wouldn't last very long in that high heat environment. And getting to them afterward would be a huge PITA. Just saying.
Also, you may have already done it since the picture was taken, but I recommend chasing the studs and holes in the manifold with a tap and using plenty of hi-temp copper anti-seize so you get an accurate torque and seal. The gaskets are expensive and exhaust leaks suck.
Also, you may have already done it since the picture was taken, but I recommend chasing the studs and holes in the manifold with a tap and using plenty of hi-temp copper anti-seize so you get an accurate torque and seal. The gaskets are expensive and exhaust leaks suck.
Last edited by Sgtblue; 11-20-16 at 08:47 AM.
11-20-16, 09:30 AM
#7
They are, and I was unsure about that myself given the area. It's a stainless bolt kit from himni racing and I don't know the specs on the nylon. There are high temp nylon lockers but I rather doubt these are that grade. I had the Lim ceramic coated and didn't want to put the rusty hardware back on there. I haven't touched the hot side yet, still building up the intake. I think I may go ahead and send the manifold off and find some heat shields. Better more than not enough. I find I'm having to chase threads on just about everything, 24 year old cars are no joke