Author Topic: Cracked exhaust manifold (Read 11456 times)

vincesyota · « **on:** Mar 26, 2011, 10:13:58 PM »

I have a 95 tacoma with a 2.7 in it, this will be the 3rd exhaust manifold that has cracked.

The first time I had a shop install an aftermarket manifold that cracked within 3 months.

I replaced the second with a toyota manifold, it lasted 6 months and its cracked again, any ideas on what is going on?

junya92toy · « **Reply #1 on:** Mar 26, 2011, 10:59:00 PM »

Talk to a dealer, see if they have a service bulletin about it

86bobbedtoy · « **Reply #2 on:** Mar 26, 2011, 11:29:53 PM »

yeah thay always break, bad design
you can make a brace from the block to the flange,
or go with a header

sctoyota · « **Reply #3 on:** Mar 30, 2011, 03:05:15 PM »

I just got the painted Pace Setter header. I haven't installed it yet, but I'm hoping it will work well. It was less than $200 from Summit.

md_530 · « **Reply #4 on:** Apr 04, 2011, 08:51:22 PM »

after 2001 toyota upgraded to a header for that exact problem with the 3rz's if you go into toyota i think they are like $180- $200 bucks for the 2001 oem exhaust manifold

md_530 · « **Reply #5 on:** Apr 04, 2011, 08:52:44 PM »

if you got the $$$ i would upgrade to LC Engineerings header http://www.toyotacatalog.net/M1WebGear/ProductDetails.aspx?PartUniqueID=9A2AF687-D170-4B69-9986-14E0E816A140

junya92toy · « **Reply #6 on:** Apr 06, 2011, 04:41:53 PM »

Just weld it

brookspage · « **Reply #7 on:** May 12, 2011, 06:15:35 PM »

not the best fix and its hard to weld potmetal

junya92toy · « **Reply #8 on:** May 12, 2011, 07:13:25 PM »

its not pot metal, its cast iron

93REDCRAWLER · « **Reply #9 on:** May 15, 2011, 04:23:10 PM »

Quote from: junya92toy on May 12, 2011, 07:13:25 PM

its not pot metal, its cast iron

X2

raidernation · « **Reply #10 on:** Jun 09, 2011, 03:43:43 PM »

Get a dealer part from a 01-04 2.7L. They changed the exhaust manifold design in 01 due to cast iron flaws. The 01-04 part is a tube steel style.

BHT12 · « **Reply #11 on:** Dec 01, 2011, 06:03:24 PM »

My header on my 99 3rz taco was cracked completely in half.. i just welded it up with my arc welder.. hasn't cracked yet but i havent put enough miles on it to make it crack again BUT.. I head from a Toyota guru back in my home town that sometimes the 3rz's have a problem with them running lean? says maybe its running lean which makes the manifold hotter whch makes it easier to crack.. sounds like a legit explanation to me?

ryan_ackerman · « **Reply #12 on:** Dec 01, 2011, 07:13:05 PM »

pot metal = cast iron. nickel coated rod, preheat, weld, ping, postheat

junya92toy · « **Reply #13 on:** Dec 02, 2011, 04:05:17 PM »

Pot metal is not cast iron
Usually its a blend of whatever is left in the "pot" its mostly zinc based.

HULK · « **Reply #14 on:** Feb 14, 2012, 07:38:05 PM »

Just changed mine....

kneedownnate · « **Reply #15 on:** Feb 14, 2012, 08:46:58 PM »

Egad

BHT12 · « **Reply #16 on:** Feb 14, 2012, 08:54:59 PM »

wish i could see the pics.. lol

jmsdad · « **Reply #17 on:** Feb 26, 2012, 01:24:03 PM »

For the 2.4/2.7, you need a mini header like this...

BHT12 · « **Reply #18 on:** Feb 26, 2012, 07:27:08 PM »

Quote from: HULK on Feb 14, 2012, 07:38:05 PM

Just changed mine....

This is exactly what mine looked like.

emsvitil · « **Reply #19 on:** Feb 26, 2012, 09:35:23 PM »

Quote from: jmsdad on Feb 26, 2012, 01:24:03 PM

For the 2.4/2.7, you need a mini header like this...

Would that fit on a 22RE?

NoChromeOffRoad · « **Reply #20 on:** Mar 15, 2012, 11:41:42 AM »

Quote from: jmsdad on Feb 26, 2012, 01:24:03 PM

For the 2.4/2.7, you need a mini header like this...

where did that come from?! That's a sweet llooking part....

HogCanyonHopper · « **Reply #21 on:** Mar 16, 2012, 12:17:41 PM »

http://www.car-part.com/index.htm

NoChromeOffRoad · « **Reply #22 on:** Mar 17, 2012, 12:36:34 PM »

Is that the stock header off the '01-'04 that everyone is talking about?

hytenor · « **Reply #23 on:** Jul 22, 2012, 11:24:28 AM »

_HOIST_ · « **Reply #24 on:** Jul 22, 2012, 11:49:22 AM »

Quote from: emsvitil on Feb 26, 2012, 09:35:23 PM

Would that fit on a 22RE?

Even if the flanges fit, which I highly doubt, 2/3RZ's are passenger side exhaust.

HogCanyonHopper · « **Reply #25 on:** Jul 22, 2012, 03:54:26 PM »

no. those are not 22re compatible at all.

Jaysen · « **Reply #26 on:** Aug 06, 2012, 08:48:44 PM »

U might need a flex pipe, help keep stress off the manifold!

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