Exhaust "Tick"

Anyone had issues with the stock 1st gen exhaust manifolds? Mine developed a "tick" when cold which is most likely a small crack or slightly warped flange. From what I understand, swapping out the manifolds is a real PITA on 1st gens so I have simply ignored it for about 2 years (goes away when she warms up).

 

You sure its not the gasket gone bad?

 

Not sure what it is....it started a couple years back...local mechanic said Tundras had issues with the exhaust manifold cracking. Hasn't gotten any worse and still passes smog so I've sort of ignored it as it goes away when warmed up. Can't really get to a spot to look at it as the 4.7 is crammed in pretty tight in the 1st gen and there is tin shrouding around it all. Just thought I'd see if anyone has had a sim issue...

 

I have the 4.7 with 144 on the clock no leaks at all yet. Toyota is not the best at manifolds.

 

I have the cold tick at 135k. Something to do with exhaust manifold (crack or bad gasket?). Heard it was a common thing. Doesn't seem to impact performance or mpg though.

 

I have heard that the tube type manifolds get cracks. Mine has the tick on the drivers side...been there for a few years and still passes smog etc. Haven't changed it as they are a PITA to change out on the early Tundras.

 

Common on early 4.7s... Cracked manifolds

 

When you get ready to do your next 90k service replace the manifolds at the same time. My manifolds came out in 2 pieces when they went to change the gaskets. 102k at the time.

 

My 2000 ticks for a little while until the headers get hot, then sounds normal. I figure I'll just run them until it gets worse then throw a new performance set on.

 

I have heard good things about these replacement manifolds. Way cheaper than OEM, like Amazon for 165.00
Dorman 674-683 Exhaust Manifold Kit