How important are the exhaust manifold heat shields? (1 Viewer)

[ShaneA320]

91 3fe

Pulled the heat shields off to looks for an exhaust leak today (wish I hadn’t… the leak was at one of the Y pipe connectors )

In the process, all but 2 bolts snapped. One on each remains.

Anyone running without them? Is it worth the effort to go through the bolt removal?

 

[CJF]

My 91 has been without them for the past 25 years.

Still have them on my 92. I don't see any reason to remove them, but I also don't miss them on my 91.

There must be a *little* more heat hitting the firewall on the 91, but never to where I've noticed.

 

[60 toy ota]

Same thing happened to me with the 2fe in my 60. I never got around to fixing it, and though it was fine for the 6 years I had it, it always bothered me and made me nervous for the long term

 

[LongDuck]

Pretty sure the lack of heat shields is the direct cause for engine fires and head gasket issues...

You just made room for a Burrito Tray up there in time for your next run; take advantage of it, and know that every hot burrito you eat on a run made your engine thermal efficiency that much better over stock.

 

[CJF]

Pretty sure the lack of heat shields is the direct cause for engine fires and head gasket issues...

You just made room for a Burrito Tray up there in time for your next run; take advantage of it, and know that every hot burrito you eat on a run made your engine thermal efficiency that much better over stock.

He's talking about the ones on the downpipes.

 

[KosPar]

I just took off some rusted heat shields that were causing the most annoying rattle ... wondering if I should bother replacing them.

 

[leonard_nemoy]

Get ready for an extra 3 degrees on your feet

 

[Kernal]

He appears to be driving an LX470, but the effect is the the same, hot feet, possibly heat damage to any wiring bundles/plastics/rubber/seam sealer/painted surfaces under the vehicle, ---), and increased chance of catching something on fire (undercoating, tall grass/weeds,---).

 

[leonard_nemoy]

He appears to be driving an LX470, but the effect is the the same, hot feet, possibly heat damage to any wiring bundles/plastics/rubber/seam sealer/painted surfaces under the vehicle, ---), and increased chance of catching something on fire (undercoating, tall grass/weeds,---).

Yeah, same difference

 

[zapatius]

He appears to be driving an LX470, but the effect is the the same, hot feet, possibly heat damage to any wiring bundles/plastics/rubber/seam sealer/painted surfaces under the vehicle, ---), and increased chance of catching something on fire (undercoating, tall grass/weeds,---).

I like to live dangerously......

 

[Dave 2000]

I like to live dangerously......

That's the way to do it, but purchase a decent fire extinguisher just in case eh?

Regards

Dave

 

[zapatius]

That's the way to do it, but purchase a decent fire extinguisher just in case eh?

Regards

Dave

I actually replaced all mine under the truck when I did the head gasket. I cleaned them all up (or replaced the rusty ones) and painted them with a high heat ceramic paint for longevity's sake. The only ones I don't have now are the ones over the exhaust manifolds. But, I do also have a fire extinguisher.