2 bolt manifold heat shield

Hi folks

Anyone know where to source a 2 bolt exhaust manifold heat shield? I can't find any online but perhaps I am not using the correct search terms.

I've had to make a modification to temporarily fit a 3 bolt heat shield to fit a 2 bolt aftermarket replacement manifold.

Where do the 2 bolt heat shields originate? For example, are they a stock item on a later engine?

I'm weighing up whether to purchase a 2 bolt model (if I can find one) or to weld up my modification into solid shape.

Thanks,

rb

I believe the 2 bolt version is fitted to the cars that have had their cracked manifold replaced under warranty by the dealer. The manifold is a revised design with a single cast manifold.

Rightio, that explains why there aren't (m)any for sale..

I just replaced the manifold with a single-cast aftermarket part, and ran into a couple of annoyances in addition to the 2 bolt heat shield. One was that the cast thickness interferes with the 2 inner-top manifold nuts so that none of my sockets can actually reach these. I torqued all the others with a torque wrench, but these top 2 I had to guess-torque with an open ended spanner. I suppose I could have tried grinding down a socket.

The other annoyance is that I think the angle at which the turbo bolts on to the manifold is slightly off, and the turbo support bracket needs a bit of filing so it fits again. (thinking..) Perhaps this is because the turbo/manifold gasket I received is a 4 layer type, and what I pulled off only had 2 layers. That could have slightly shifted the position of the hole for the bracket bolt relative to the engine.

Are you using a genuine honda manifold or one of the eBay copy ones?

Definitely not a "Genuine Honda" part (but even Honda uses a contractor for parts). The price difference between "genuine" and "buyer beware" was huge, and even though lost wax casting / copying a lump of iron is not rocket science, small variances in tolerance can occur. This is not uncommon in aftermarket parts, as most mechanics probably know.

I might do a dye-penetration test on the defective manifold and re-weld it. If I ever have to pull the turbo out again I could put the original manifold back, and fit a 3 bolt heat shield.

I think that's the issue though, it's an aftermarket part which isn't built to the same tolerances.

We regularly reweld them in the workshop to be honest.

Do you actually weld them or is high temp brazing enough? I like brazing because it flows better and looks pretty.

No my mechanic breaks down the old weld and rewelds the whole thing from scratch

That is probably a better way of doing it instead of mucking around chasing a minute crack with a dye penetration test. Cheers.