My 603 head gasket finally failed... - Page 2 - PeachParts Mercedes-Benz Forum

Hit Man X · #16 11-27-2010, 04:07 PM

Last real recorded miles on this 603 were 241k and some change back in '05. I would be surprised if I have put 15k on it since then. I have suspicion the head has been off before but no documentation to prove, but if true... I do not believe the job was done properly.

Okay, I have new style injectors and prechambers so I need the new style GPs.

I am going to do my expansion tank and the rest of the cooling system hoses... even that $90 lower rad hose. I do not trust that tank anymore.

Vac pump is the new style, four bolt job. Oil pressure has always been good, should I do the pump? I do not see them being inexpensive like the Melling for my Small Ford.

Not sure if I need the 606 gasket, I have no reason to turn the power up on this car and do not plan to do so. I am going to have the IP resealed and calibrated to the high side of factory spec at a quality shop and be done with that aspect of fueling... and do the same with boost, high side of factory spec. I just need to find out what turbocharger is more efficient, the KKK or the T3. I have both.

The performance is more than adequate for what the vehicle is currently and the durability is there... which is what I enjoy this car for, simplicity and durability.

BoiseBenz · #17 11-27-2010, 04:29 PM

X2 on MB OE bolts. They'd already been rev'd a few times when I did mine three years ago.

DieselPaul · #18 11-27-2010, 04:40 PM

Quote:

Originally Posted by compress ignite

Diesel Paul,

OWT (Old Wive's Tale) / Urban Internet Legend ???

I'm hearing from some builders that the Block and Head mating surfaces HAVE
to be "almost" microfine polished ,when using MLS gasketry.
[Due to the inability of MLS to compensate for minor surface imperfections]
[Why else would VHT Copper Gasket Cement be available on Earth???]

(As opposed to "Flat and Straight" in normal composite gasketry)

Comments? Facts? Opine?

Never used one. Never done a hardcore build nor put a a 606 gasket on a 603. The 606 gasket IS MLS, and according to the Finns, it fits, and works fantastic. Their dyno's made me a believer. People are making 500WHP on OM606 gaskets. It must be sealing enough.