Bobbyg75

Just bought new set of Dynomax ceramic headers for the freshly rebuilt motor. Motor shop tells me some ceramic headers require a break-in period, which consists of heating the pipes up for a couple minutes then allowing them to cool completely and repeating the heat-up/cool-down several times. You can see the probelm with the cam break-in requirements.

Do Dynomax ceramics require a break-in? Nothing in the literature I received speaks to it.

Thanks,
Bob

Metal Wulf

I never did that with mine... I just put them in and drove the crap out the car like normal. had them a year and they still look great :thumbs:

den(thevetteman)78

to break in a fresh motor i ve heard not to use ceramic header for the first time.thats all i know.

Older Than Dirt

Here's what Jet-Hot says about their coated headers........


During tuning of certain engines, lean or rich fuel/air mixtures can cause hot spots around 1300 degree F. If you are not very careful, you will damage the coating and possibly the engine. The coating will definitely turn dull and possibly flake off in excess of these temperatures. During this period, we recommend using a large floor fan to cool the entire engine and headers. Ignition timing is critical to exhaust temperatures which are not reflected by the water temperature gauge. It is not unusual to see 190 degree F on the water gauge when internal exhaust temps are exceeding 1300 degree F.

Vetterodder

Make sure that your timing is set right before startup. If you're not sure what the new engine wants, more advance is safer than too little.