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Old 08-17-2011, 07:48 PM
Registered User
Join Date: Oct 2005
Posts: 20
Could this be both the rocker arm and hydraulic lifter problem

My 1989 300SE has the following symptoms:

There is ticking sound on the top of the engine, it is louder toward the distributor cap, to be precise it is under the oil cap.

I opened the oil cap while the engine is running, the ticking is synchronous with the movement of the rocker arm.

When I accelerate the ticking gets louder and faster and faster.

Today I opened the black cover (enclosure) so that I could see the camshaft, rocker arm etc.

The first two (I mean one on the left and the other on the right) rocker arms, this what I observed:
These two rocker arms are not stable or not fixed, for I was able to move them horizontally with my hand. Secondly I held the rocker arm and twisted both left and right it made a click, click sound.

Nine out of the 12 rocker arms have the same symptoms.
The other 3 rocker arms are solidly stable and could not move them.

Here is the picture of the rocker arm.

Itís like the whole in middle of the rocker arm is too big and hence some free play.

Whether the engine is hot or cold the ticking is there.

According to the forums on this website, my conclusion could be that it is the hydraulic lifters. But also in this case I have these rocker arms which are kind of loose, itís like the bushing is won out.

Please help.

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Old 08-18-2011, 09:30 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
No picture.

Have you tried unbolting a pair of rocker arms & looked at the wear on the cam & rockers?
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Old 09-07-2011, 11:39 PM
Registered User
Join Date: Oct 2005
Posts: 20
I was able to repair it myself.

The camshaft, lifters were badly won out.

Replaced camshaft, rocker arms and hydraulic lifters.

Just as indicated in this site, you just need to take your time...

I also got some camshaft help from Phil.

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Old 09-10-2011, 01:03 AM
Registered User
Join Date: Nov 2002
Location: Frankfort, Il.
Posts: 264
rocker arms

I have the same problem with my 89 300TE, I have a 92 300E 2.6 parts car, thr rocker arms seem to be the same, are they????????????????
Thanks, Ken

'05 Ford Escape 100,000 miles
'87 560SL 92000 miles
'89 300TE 199,000 miles
'02 Audi TT 100,000 miles
'00 Ford Excursion V-10 121000 miles
'92 Mercury Capri 100000 miles
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'92 230CE 160000
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