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Old 08-06-2002, 12:54 PM
Registered User
Join Date: Jul 2001
Location: SoCal
Posts: 1,303
clunks when started

'91 190E 2.3. Most of the time, when starting the engine, it rocks back and forth with a clunking sound, then purrs along fine. Noise and vibration while driving is very low for a four, and not a problem (though perhaps more than when new).

According to the 13mm bolthead test, the motor mounts need replacement, but I wonder if the 'bumpy' startup is more indicative of another problem, such as pressure leakdown? Running seems fine, with somewhaty erratic idle at times, and rarely, - a stall.

Should I look for other problems before replacing the motormounts, or is the engine shaking - that bottoms OURS out - normal when starting?

Thanks for any help.

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Old 08-10-2002, 06:17 PM
Posts: n/a

I am sorry since I don't have a reply for you, but I have a question. I've read your old post regarding hose replacement in your 190e, and I was wondering how difficult it was to replace the hose that goes between the cylinder head and the heater (the one that goes through the firewall)? Mine completely fell apart due to age and I was wondering if disassembly of the entire dash is gonna be required...

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Old 08-11-2002, 12:33 AM
ymsin's Avatar
Driver, Mercedes-Benz
Join Date: Feb 2001
Location: Malaysia
Posts: 1,645
The 260E had the clunks and shakes whenever its cranked. That was a result of worn engine mountings. Had it replaced and now its beautiful when cranking - without a shake (you'd hear the crank and has a feeling of the body being detached from the engine).
... Kerry

126 tailed by a 203, 129 leading the pack.
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Old 08-13-2002, 10:34 AM
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Join Date: Jul 2001
Location: SoCal
Posts: 1,303
Thanks ymsin, this is the input I was looking for!

Arthur2k, there are two firewalls, and the only deterioration I found visible on the outside of the hoses occured on the engine compartment side of the outer firewall. Therefore, I did replace the one hose which passed through the outer firewall, but it was accessible from above, in the inter-firewall region. Definitely locate the car where you can latch the hood in the full vertical position for this job.

There was one small hose located entirely in the inter-firewall region, and I did not replace it. I WILL keep my eye on it, because it turned out all the hose deterioration was due to oil in the coolant from a head gasket leak. That has now been repaired, but even one of the NEW hoses failed in a short time due to the oil.

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