RanchoToyotaTruck

Here are a few of my crossover pipes
also built using most of the stock parts

slacker

iTrader: (1)

I built mine for $30.00 ( + consumables , and my time )

Lysmachia

How Much Steve? I assume that will fit fine with my 1997 3.4 in my 2nd Gen...

Now that the weather is much nicer We are ready to begin the surgery. At least I already have the 3.0 pulled and out of the way!

syber_kowboy

Are those stock flanges with custom pipes and a stock flex joint? Did you buy the pipe and shape it yourself? Thanks

Lysmachia

God I forgot about how awesome this thread was.....

Jason4X4

Cool...

mt_goat

Some of us have had a problem with the crossover wrapping. Apparently it allows the metal to get too hot and causes the pipe to crack. This is probably made much worse by using too much overlap with the wrap and or supercharging the engine. Ceramic coating seems to be a better option.

Pic of my crossover failure, note the flaking of the metal, this was inside too resulting in the pipe thickeness decreasing more and more until a crack developed (or that's my theory anyway) It was very thin where it got too hot, it must have been very close to molten because it scaled over and got flaky like molten steel gets. Some would confuse this for rusting out, but I'm sure it wasn't from rust. I was careful to always run the engine for a while after washing the truck to evaparate any water from the wrap.

neoworm0

Mt. Goat, have you heard of anyone who has had thier xover ceramic coated and having it crack? I had mined ceramic coated but I'm wondering now if I should just try to beef up that joint before I go ahead and put my motor in. This problem seems to be getting more common.

Opinions?

mt_goat

I can't remember anyone having a failure with a ceramic coating. At least make sure you support the crossover with a brace at the bell housing, something like this:



And put a flex coupling after that (before the cat).

Lysmachia

Getting ready to do this. Man it is so exciting to finally get my 3.4 in there!

mt_goat

Go Molly go

904_runner

NICE!!!!

Im about to start one i think...
Glad i found this thread.

spanish-road

I know that heat wrap would damage the pipe and welds, since it would cause mass build-up of heat.

904_runner

Okay so with that being said how many people used the wrap over it??

Would you recommend it or not???
Im going to start mine real soon

mt_goat

Just spend the extra $40 or so and get it ceramic coated.

okie81

As stated above, wrapping get's things hot. I tried header wrap; no bueno.

slcpunk74

So is it not possible to use the log style exhaust manifolds with a Y under the trans? Just curious because Im getting ready to start my swap.

neoworm0

By log do you mean "stock"? If so. Yes it is. You need to buy headers.

slcpunk74

damn! well i guess the prerunner will just be that much more fun.

904_runner

Got mine done.. remember guys to sort of tuck that exhaust flange close to the transmission so it doesn't interfer with the frame.. ill have to modify mine some how in order to get this done...



I did get it done though..
Thanks for the write up!