Turbo Manifold Bolts

[marcman804]

In the pass two weeks ive had to take my turbo off three times because of those damn turbo manifold bolts. I bought some bolts at advance auto because the guy told me they were high temp bolts (NOT!) They lasted about three days and I didnt even drive my car hard. I went back to see if they had loosened up and when i tried to tighten a little bit, "SNAP" the heads broke off of two of them. So I had to pull the turbo off once again and I ordered the oem bolts from extremepsi. i had to drill out the old bolts and in the process the threads got messed up. I tried to retap the holes but the tap that i have is a different thread pattern than the bolts. I was wondering what can I do because im sick going through this torture. Any help would greatly be appreciated. And another thing I was wondering around what is the proper RPM i should be at when i hit full boost on my EVO 16G? Im thinking its pretty good but im not positive, at half throttle it hits full boost around 3300 RPM. Is this good?

 

[asexton6969]

I would go ahead and helicoil all of them. I kept having similar problems except mine didnt back out. It was just when I went to do maintenance (new turbo gaskets etc.) they snapped off. I have since then helicoiled all of them and I no longer have any problems. Depending on how you screwed them up you may have to drill them larger and possibly even drill the manifold bolts open a little bit larger as well.

Quick link I found

http://www.roadstarmagazine.com/modules.php?name=News&file=article&sid=233

 

[jking29]

In the pass two weeks ive had to take my turbo off three times because of those damn turbo manifold bolts. I bought some bolts at advance auto because the guy told me they were high temp bolts (NOT!) They lasted about three days and I didnt even drive my car hard. I went back to see if they had loosened up and when i tried to tighten a little bit, "SNAP" the heads broke off of two of them. So I had to pull the turbo off once again and I ordered the oem bolts from extremepsi. i had to drill out the old bolts and in the process the threads got messed up. I tried to retap the holes but the tap that i have is a different thread pattern than the bolts. I was wondering what can I do because im sick going through this torture. Any help would greatly be appreciated. And another thing I was wondering around what is the proper RPM i should be at when i hit full boost on my EVO 16G? Im thinking its pretty good but im not positive, at half throttle it hits full boost around 3300 RPM. Is this good?

When you bolt the turbo back on, you need to use 2 of the factory washers per bolt and a little bit of copper anti-sieze. JNZ carries the washers, and NAPA has the copper anti-sieze. You may also have to helicoil the holes you re-tapped to get the factory bolts to hold correctly. It depends on how much material you removed when you ran the wrong tap in. Full boost at 3300 rpm is about right on a Evo3.

 

[marcman804]

what does helicoil mean?

 

[asexton6969]

in the shape of a coil
Of or having the shape of a helix; spiral.
Having a shape approximating that of a helix.

Dictionary Term

It's basically the same thing as tapping for a bolt. Except you put this helicoil insert into the hole. Read the website and you should understand a bit better. If your still confused I'll try to make or find a diagram.

Go to google, click images and type in helicoil insert. You might get a better idea, the insert goes into the new tapped hole. Now you will be able to insert your new bolt.

 

[tqmx1]

Did YOU even read the link asexton6969 gave you? Read it and you shold understand. A helicoil is a staneless steel threded insert for stripped out threds.

 

[marcman804]

where can i buy one for the oem bolt specifications?

 

[asexton6969]

Check your local hardware stores, home depot, ACE, Theisens, etc.

 

[mini zilo]

Here is the EASIEST way to do it...

Because you messed up the threads on the TURBO: Re-tap the threads on the turbo to a bigger size, that way you will get rid of the old stripped threads. Then, go to the hardware store and by bolts for that size, BUT, make sure you get a good grade bolt like 8 or 9 grade, those should withstand it very well.

 

[marcman804]

Thanks For All The Help.

 

[copper95]

I'm getting ready to do my Evo16g and my friend snapped at least one bolt every time he took his off so I order arp bolts from FFWD connections and had to go find some nickel anti-seize for them because your not to use copper based anti-seize on stainless. So we will see how they work out. Maybe you can heliacoil and do that.