WeatherGuy

I have the Dynatech stepped longtubes and the Dynatech slip-on collectors. The headers look and perform awesome - I don't think there is much question about that.

However, the Dynatech collectors are a slip-on design, and do leak sometimes. This can cause problems when outside air gets through because it can play havoc with the O2s.

Does anyone know a way to seal these up against air-leaks? It looks like it would be very difficult to TIG weld it. I would hate to have to scrap these one day because the things otherwise perform so well.

Ideas anyone?

WeatherGuy

TTT - anyone?

wicked 98z

I would like to know to. I looked at mine to day and i saw some carbon build where they slip on.

Albert

ChrisB

No reason you couldn't weld it up = you would probably want to at a minimum pain the weld or you could have the entire header re-coated.

You might try some sort of exhaust band clamp, etc. - but welding would be my suggestion


Chris

LEO

iTrader: (3)

The FLP headers have a V-band clamp and they are not very successful at preventing leaks - especially if you drive on alot of rough roads, there needs to be frequent tightening of the clamps to prevent the leaks.

gator's 99TA

iTrader: (2)

i have these dynatech slip on headers and they just leak. i have put on high temp RVT and it helped a TON. a lot less exhaust smell inside the car at stoplights. then again i have NO emissions and the hotcam. but a little bit of work and you will get rid of that leak. remember they are drag racing slip on headers meant to be run wide open! sorry. they do sound and run great!

WeatherGuy

[quote]Originally posted by gator's 99TA:
<strong>i have these dynatech slip on headers and they just leak. i have put on high temp RVT and it helped a TON. a lot less exhaust smell inside the car at stoplights. then again i have NO emissions and the hotcam. but a little bit of work and you will get rid of that leak. remember they are drag racing slip on headers meant to be run wide open! sorry. they do sound and run great!</strong><hr></blockquote>

Thanks for the info. Which exact sealant are you using (I assume that is a sealant)? Do you have any problems with it getting on the O2's?

dan98z

You can get the rtv sealant that is rated to 1200 degrees. I would try using some exhaust repair tape first if you can. Just place a strip over the collector tubing and let the car run for a while. I had to do this with my FLP clamps and it is running great about 3-4 months later. You can also paint over the tape with silver paint and you wont even see the tape on there unless you get down and look close.
-dan

WeatherGuy

Thanks for the info guys - I will go ahead and try this to see how it does.

Pro Stock John

iTrader: (34)

If I had some I'd be using some RTV.

Matt98SS

use the ultra copper RTV for exhaust it will work wonders <img src="gr_images/icons/wink.gif" border="0">

PaiN

heres what you need.

http://www.burnsstainless.com/

TrahnZam WS6

Could you be less vague, Pain?

gator's 99TA

iTrader: (2)

i have had no problems with the rvt. you can buy this at most part stores. it is the "red" rvt - which is not sensor safe, but has not been an issue with my car at all. you are not coating the sensor hole itself anyway.

01 SS Jay

Try muffler cement or some sort of high temp epoxy sealant.

Pro Stock John

iTrader: (34)

Another option is to get the Weld-on collectors from your Dynatech dealer, and also get the 18mm bungs.

We are trying to decide now, I may try the slip-on collectors with the sensor-friendly hi-temp RTV. We have to decide by 1pm today otherwise I can't get the weld-on stuff by next Tuesday.

RyanJ

NEWSFLASH! Take them off...buy some merge style 3.5" collectors (or 3" if thats your y-pipe dimensions) from Burns, and then them WELDED. People have welded collectors before. In fact ive seen some custom headers with merge-looking headers welded on. hmmmmm

WeatherGuy

Just saw the availability of weld-on collectors in the other post (Dragula). I will check to see what I can do quickly. It would suck to be making a pass and then have air leaks send my O2s to hell.

ChrisB

I still say weld it up. Just bite the bullet and do it. And a merge collector is the way to go, just pricey.


Chris