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  #1  
Old 08-06-2006, 12:54 AM
dkveuro's Avatar
Sword of Damocles
 
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ALL 603 engine owners survey. Please respond.

Am asking if you have ever had piston/bore damage on 603 engines...if so, what piston/bore was affected ?

So far...I find #3 cylinder the most common.

Thank you for you attention.


.

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Last edited by dkveuro; 08-06-2006 at 01:56 AM.
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  #2  
Old 08-06-2006, 01:06 AM
Banned
 
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not yet............
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  #3  
Old 08-06-2006, 01:16 AM
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Hopefully never, that will be a nice $6k blow up thats or sure.

Coming up on 256k with the original head and head gasket. Burns zero oil, 0-60 in 10.63 seconds. What more can I ask of the old girl? 5k rpm no sweat, 110mph no problem, 23mpg feh can't have it all.
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Old 08-06-2006, 01:31 AM
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Not on mine, just a leaking turbocharger (like most )
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'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

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  #5  
Old 08-06-2006, 01:34 AM
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I bought an 87 300D with no head. PO let the mechanic send the head out and lost interest when they said it (the head) wasn't repairable. I bought it for the mech lien. (now I know why they say the cheapest Mercedes is always the most expensive one!) Oh, it has 260K on it.
We found some scoring in one quadrant of cyls #5 and #6 due to worn rings. Others were ok. I had the ridges reemed and all cyls honed w/ engine in the car.
I re-ringed the pistons myself. Bought a used #14 head and had it rebuilt and resurfaced. New timing chain. Reconditioned injectors. New lifters.
Happy to report no problems almost a year later and it uses under a quart every 3000 miles, most of that looks like its leaking from the front seal.
I have had a little knocking (not really bad!) on cyl 5 when cold, just below 1500 RPM or so. Under acceleration its quiet. Its not a rod knock, its fuel related. I attribute this to a leaking IP delivery nozzle but I haven't had time to replace seals yet to prove it. It has improved in the hot weather but by winter I will replace the seals and hope it subsides but its not really much to worry about.
My other '87 300Dt (also 260K on it!) has never had more than a noisy lifter, replaced them all and its running like new!
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Old 08-06-2006, 01:37 AM
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To replace that front seal, do we have to yank the timing cover?

Also, do bad delivery valves make the motor sound like it has rod knock?
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'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

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  #7  
Old 08-06-2006, 01:50 AM
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.......No....pull the balancer/crank pulley.
I presume you are refering to the front crank seal ?

.
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  #8  
Old 08-06-2006, 02:01 AM
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Quote:
Originally Posted by dkveuro View Post
.......No....pull the balancer/crank pulley.


.


OOOOO!!!

Excellent news! Yes the front crank seal. Just get the old one out and stick the new one in?
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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
[/IMG]
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  #9  
Old 08-06-2006, 06:24 AM
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When the SDL head had cracks they were primarily in the #4 cylinder with cracks starting in the #5 cylinder. The bores and pistons looked fine.

Sixto
... stay tuned

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