Cam chain fault then major problem.

hotch743

New Member
Joined
Sep 24, 2011
Messages
9
Car
C180K Coupe
Hello all, first post and “OH” need advice. Bought a 03 C180 with 71.000 on the clock no initial bad sounds, faults,drives well and has the MERCEDES renowned badge on the bonnet, and got it for a good price, what more could you want.
1000 miles later a misfire, checked it all found nothing, then wouldn’t start, towed it to a merc specialized garage. They checked it out and told me timing CHAIN stretched,” what”. Had them fit a new chain and tensioner as they said that not all cam chain faults cause damage to the cam timing.
£500 later still wouldn’t start, chain had jumped 2 teeth on inlet cam and one tooth on exhaust cam.
Took it stripped top end all inlet valves bent all exhaust need grinding in, replaced inlet valves and guides, inspected piston heads, no deformation. Rebuilt engine with the help of a cam timing jig tool.
Started, ran perfectly 10 months 1200 miles then engine management light and a knocking tapping sound from back of engine. Took to a known mechanics who used an inspection camera and told me that No 4 piston was scrapping the bore, was caused by valve hitting crown.
So engine needs to come out then rebore and oversize pistons, on a Merc, pardon.
Any help and ideas? Anyone removed an engine? Where would you recommend for engine work.
Sorry for first post, but it takes a bit of believing.
 

Dieselman

Banned
Joined
Jul 13, 2003
Messages
34,206
Car
Peugeot 403 Convertible
A very common fault on that engine. The chain wears, then the sprockets wear, then all hell breaks loose.
While the head is off, check the valve guides are still in tight, they come loose and cause valves to wobble about and not seat.
 

trapperjohn

MB Enthusiast
Joined
Nov 19, 2008
Messages
7,305
Location
Lancashire
Car
124 300D 24V Estate
Welcome to the forum Hotch 743. Sorry to hear of your problems. Tell us where you are in the country (a county will do it, if you are shy) and we can tell you a decent guy to sort your engine.
 
OP
OP
H

hotch743

New Member
Joined
Sep 24, 2011
Messages
9
Car
C180K Coupe
Thanks trapperjohn, Live near Hull, East Yorks.
How difficult/easy are the engines to remove and where can oversize pistons be found, I`ve been told nobody supplies oversize and that the piston bores are dry linners.
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top Bottom