Engine/Transmission (1998.5 - 2002) piston coatings

[MarshallB]

anyone have any sugestions. product? tops? skirts? underside? big question is price for the ones that have had it done.

 

[Mhannink]

techline and coat everything you can

http://www.techlinecoatings.com/

 

[ThrottleJockey]

Arias. Forged and come coated with a hard anodized type glaze.

 

[DCreed]

forged better than hyperutectic?

 

[strehl]

I've had Swain technologies coat a couple pistons for some of my old sleds. I was very impressed at the quality. I've also ran them extremely hard and not melted them down. That sold me on them. I think there around $50 a piston but it saved me several hundred in the improved durability.

 

[MarshallB]

thanks contacted swains and the rep is working me up a quote for the piston bowels/tops/skirts/underside of the pistons. my rods. rod and main bearings and my crank for the journals and counterweights. i have a feeling this is going to hurt. but its out and if i can get a couple seasons out of this i'll sell it and move on with the new 07.

 

[NHelmer]

forged better than hyperutectic?

yes forged are definantly better than hyperutectic. Hyperutectic if I remember right disapate heat better but won't hold up to N2O long or high boost apps (as seen in our trucks) like forged will. I have hyperutectics in my 83 Trans Am and had a 75 hp shot of N2O on it with no probs. Got rid of it (N2O) after 10k miles though cause I got tired of filling tanks and used the car as a daily driver (oh yeah there are those tickets too ). Car still runs great. Not sure about oil apps though. Do they even make hyperutectics for oil burners?

 

[DCreed]

dont know if they make em thats why i was wondering i been told if the silicon level is right there are advantages.

 

[zstroken]

There are some concern about coating pistons and not the head. Since the piston is not absorbing the heat, the head could be picking up more of the heat.

 

[flattracker]

Had a set coated by Swain several years ago, ceramic heads and the moly skirts for a 3306 cat motor running with turned up fuel in a very demanding application is currently over 8,000 hrs, and going strong.

One side effect I wasn't excpecting was an extremely quiet idle.

 

[Mhannink]

forged are tougher but the hypertuetitcs(sp?) will not expand nearly as much and will allow you to run tighter clearances so less slips by the piston.



my understanding is hypers will do just about everything forged will and are almost nearly as stong but just short. i think if they make them they would work realy well for most all of what we do.

 

[MarshallB]

zstroken any insight on your coment? bad idea? way around it? what is your experience good bad?

 

[Mhannink]

There are some concern about coating pistons and not the head. Since the piston is not absorbing the heat, the head could be picking up more of the heat.

i have heard of that concern the thing to do in my opinion is just coat the head and not think about it. the head will be off too in order to do the pistions so why not. all the coatings inside there will make the combustion more effiecnt and net you better fuel milage

 

[MarshallB]

coat the intake/exhaust passages?

 

[drag racer]

techline and coat everything you can

Welcome to Techline Coatings

agree on both, but understand WHY you are coating a given part. There are different coatings to accomplish different objectives - some reduce friction/wear, others for thermal management, etc. .



For example, in my racing engines, I thermal barrier coat the piston tops and entire combustion chamber (including valve faces) with a thermal barrier coating to keep the heat in; this may not be the wisest move in a diesel engine or an endurance application, because the pistons will run at higher temp's. I coat the piston skirts with a different coating to achieve better wear/scuffing resistance.



Just something to think about.

 

[monkeyman]

I just got my pistons coated by Premier Coatings, the process is permanent and never wears off. Its called Akaldizing. Problem is they they sent one wrong piston back Friday!

Rick

 

[The patriot]

I've bee researching the nickel boron and melonite coatings for other apps.

I wonder how they'd work for our rigs... .

 

[monkeyman]

The Akadizing process is the best, it coats the top, and all surfaces except ring groves, and wrist pin entrance and inside. I had a little drip in wrist pin area, to get wrist pin in I had to use a dremel, and that stuff is hard. I e-mailed a guy on Comp Diesel who runs a six second pro stock Harley, before the process they would change pistons every second run. Now after two years they are still in! This is Norm's e-mail for information, tell him Rick from Illinois gave it out on TDR:fishn57@hotmail.com

 

[Vaughn MacKenzie]

As for coating piston tops and head surface on a diesel it makes it take considerably longer to warm up and may not be best if this is going to be a daily driver, true?

 

[Mhannink]

As for coating piston tops and head surface on a diesel it makes it take considerably longer to warm up and may not be best if this is going to be a daily driver, true?

i dont know if that would be the case. what warms up the engine is the heat going into the water. thats through the cylinder walls where there are no coatings. it might slow it down some since the heat going into the head would be slowed keeping that water cooler but thats about it. its hard to say how much that would slow the heating down.



one could also argue that it speeds up the warm up since the heat would focus on the cylinder walls more, since the head and piston are reflecting heat back.



in all you have a good thought and it would be interesting to see the results of someone doing this on a daily driver. not just heating but all aspects. take a stock engine, coat everything and then see the differences the coatings makes, especially for the long term.