If the guage is correct, it really needs another 15 degrees of operating temp to make power.

Funny, my 606 I just did Viton o rings on the lines, had the intake cleaned out, and decided to see if the GP's were stuck, altough they were changed 35K ago.

All but one is stuck. And the one I really tried to work ( PB and back and forth), is now shorting, so I am oblidged to finish the job. Methinks I'll punt to the local German mech on this one, as his shop is well equipped to drill it out if need be. What a PITA. If you do the job, do it HOT. Remember, you can start these engnes with no intake if need be.

Anyway, resue old intake gaskets? Heck yeah. I did put a new one down ( engine has 210K), but used some Indian head shellac to ensure it sticks to the head, allowing me to R&R the intalke repeatedly with no tearing. I have sometimes even "greased" the intake if I knew there was a lot of R&R to be done ( this on a big block chevy, so its even more ciritcal). The 210K mile gasket I did not reuse as dont think I could have cleaned it up well enough. so it depends on the gasket condition. At 200K, spend the $15 and glue a new one down.

Lastly, my 96 has some decent "legs" after cleaning that intake out. But if you dont let the trans get into first gear when you stomp on it, its a slug. The 606 can see 5000 rpm with ease, so if you want some oomph, manually downshift or ensure it is in lowest gear. These trannys are funny, they don't downshift into first until you're stopped it seems.

BTW, real nice power gain form the intake cleaning. It was the only real change.

DONT pull the injectors or fill your cyliders with fuel. You need a special socket and you'll need to replace the heat shields upon install. If you pull the injectors it should be to have them cleaned, nozzles checked for wear, and pop tested.

And not for nothing but my n/a 606 as quick as those 5 cyl turbos, which, of course, is like 12 sec 0-60 times, so not quick at all!.

This is my "fastest" NA606 of three, and I beleive it has to do with its excellent sealing. It's "finicky" on some summer blends of D2. reckon due to it having all of its 23:1 compression rato and 375 psi of cranking cylinder psi. Doesnt lose much power on B100 due to its solid compression, imho. My 95 needed rings, and the 97 ( which I totaled) was never as spirited as even the poor sealing 95. It also had an unusual "slapping" noise internal to the engine that you could hear with the oil filler cap off. Thought it was the chain. Sounded more like piston skirt slap. That is why I let the car get totaled in lieu of fixing it. I can build a big block Chevy to net 700 ft lbs for the same cost as rebuilding a 606! But MbZ fenders are CHEAP!

When you get the 606 in a good state of tune, its not a total slug. LASTLY, watch that PCV plumbing. It tripped me up. I forgot to order new bungs and broke near all of them when I pulled the intake. If you dont plan on replacing the PCV plumbing, you'll have to be UBER careful to not break the bungs off.

And they come from the FatherLand,. so,,, it aint overnight delivery.


Sorry, long post. Thanks for the diversion from work and best of luck!