SRT Q&A Session: 5-16-2007

[miccar]

Hello Guys,

We appreciate you making the time to listen to us SRT owners. Many of us are concerned about the white gunk coolant issue. Can you please explain what is causing this and will we have durability issues later on as a result of this? Please address this request.

[SRTengineers]

Originally Posted by Blown7

Production.

Jeff

Resonators are used in the production system to meet Federal Pass by Noise requirements.

[SRTengineers]

Originally Posted by hugabone

I have a 2006 Charger SRT8 with 13.5k miles. My car will not go pass 110 mph. The rpm would just sit at 6k. This would happen in regular drive. I took it to the dealer and as of yet, there is nothing they said they can do. I called Chrysler about a month ago and they still havent called me back to open a ticket.

Haven't heard about what you're describing before. Can you let us know what mods you've made, if any? The only thing we can speculate is to check your cats for blockage.

[SRTengineers]

Originally Posted by rtr0id

there was a big surprise

does corsa make the stock exhaust for the SRT8s?

No.

[wetcoast]

If noise and emmissions weren't an issue what would the SRT-engineers have done with:

1. Operating coolant temperature?

2. Exhaust backpressure?

3. Intake restriction/baffling?

[whiskey]

Originally Posted by SRTengineers

Yes, but you will get new tips with the trailer tow package.

I hope not smaller......please? There have been several different styles of hitches on the Jeep SRT8 site, including some super-trick through bumper models..... Even the ones with the hitch and exhaust in the same bumper access point did not have smaller tips.......

[HEMEEE]

REMINDER:
Please do not re-post questions others have already posted in this session.

Thanks-

[DoubleLX]

So, what mods have any of you done to your SRT-8s?

Assuming one uses a reputable aftermarket company, and assuming they've tested the cam so that it's not slamming valves into the cylinders are there any other real dangers to installing an aftermarket camshaft into the 6.1?

[SRTengineers]

Originally Posted by wetcoast

If noise and emmissions weren't an issue what would the SRT-engineers have done with:

1. Operating coolant temperature?

2. Exhaust backpressure?

3. Intake restriction/baffling?

WFO, baby.

[SRTengineers]

Originally Posted by MeatGrinder

A couple of SRT8 owners have installed a NAPA coolant filter, to filter out the
mysterious white substance. Upon cutting open the filter, it is filled with the
white goo. Would this filter put backpressure on the water pump? I suppose you could tell if the coolant flow was slowing too much, as the coolant temperature would rise. But would this devise harm the water pump?

Very innovative filter system! Need a job at Mopar?

We'll begin by covering the discussions from the chats 'o yore:

Cherokee SRT8 Forum - View Single Post - [COMPLETED] - 4/18/07 SRT Q&A Session

We'd like to re-iterate that "we know exactly what the issue is and are working to push the issue UP the proverbial mountain to get you guys a solution".

We hope all of our enthusiasts (aka YOU) understand that we are not spending our time here trying to put a spin on the situation. We are limited by our management and corporate structure (read check & balance system) about what we can discuss on this forum. We are telling you all we can right now. We want you to love your cars and enjoy them as much as we enjoy developing them.

With that being said... if you have an SRT8 LX vehicle that was built in the second half of 2005 CY or 2006 CY, you should check your coolant bottle for abnormal coolant (i.e. cloudy, scuzzy, floaters, ammonia smell etc). If you find an issue, please take your car to the dealer and show them the previous post in the link above. When they call DCX, they will be told to perform a flush and fill and add an additive.

Important Notes / Other Answers to Your Questions:
- The dealer must perform a flush and fill per the LX service manual, not just a drain and fill. For those of you that have had the dealer service your vehicle and the issue come back, it sounds like it was not done properly. Once a full flush has been performed, be sure to have them either flush and fill with Mopar Coolant w/ additive or flush and fill with Zerex G-05.

- The filter idea is a great one, but would be difficult to implement in the field. We've shown that the flush and fill when properly performed removes the majority of the solids and with new fluid fill, the system stabilizes.

- The white substance in the coolant is Aluminum Hydroxide. The ammonia formation is possible in ANY HOAT coolant, which is the standard in many if not most vehicles today.

- If you want to read more about this phenomena, check out papers available out there, one of which is ASTM 1546-962X and articles from the Radiator Reporter.

NO2- + 2 Al0 + 5 H2O = NH3 + 2 Al(OH)3 + OH-

WFO....PEACE