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Project continues.
This afternoon decided to clean air metering plate and assembly.

Some cleaning foam and high pressure wash later

 

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Air meter plate still not as ‘smooth’ in operation as I would like, I might have to do a more thorough strip down.

Throttle body was terrible, almost every vacuum port was blocked.

 

[oldcarsrule1]

I like the before and after pics - it's like, 'ta-da!'

Very nice.

Pete

 

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Yes certainly cleans up well. Gradually doing all the parts before they go back on the engine.

 

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Arrived this morning, although appears to be wrong part. I did check part numbers before ordering and it said it was right for my car.
Part number ordered: A1102001920
Appreciate if anyone has the correct part number ?

 

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All heater hoses replaced today. Below is the hoses from the heater control valve. There is also the main heater supply and return lines which were likely the ones that needed replacing the most. You could see signs of fatigue and not the best idea on a long hot run. Supply line would likely fail near the block and would be almost impossible to replace without a hoist or ramps.

 

[MBL87560SEC]

Arrived this morning, although appears to be wrong part. I did check part numbers before ordering and it said it was right for my car.
Part number ordered: A1102001920
Appreciate if anyone has the correct part number ?
View attachment 2643129 View attachment 2643130 View attachment 2643131

I found this by doing a Google search by application: 'water pump for 280se'

This from PartsGeek

At least there are some interchange references for you & hopefully available locally.

M

 

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Hello again, you are of so much help !

I ended up getting another pump. Its on route. Will post pic when arrives for reference. Should be right this time.

 

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New pump. Part number as above, perfect match. Surprisingly my orgingal pump is actually in good nick.

 

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Ports on intake manifold were caked with soot and carbon. Took a long time to clean out. A lot of junk removed now.

 

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Can anyone tell me what this part is called. Similar to a throttle dampener ?

It has 3 vacuum ports and after cleaning up entire engine trying to simplify things a little. Especially after deleting EGR. Not sure if all vacuum ports are necessary ?

 

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Anyone have any knowledge of the above part ?

 

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When I removed the Throttle body I removed the TPS. In hindsight this was a good thing so I could properly clean the gunked up throttle body which I used a pressure washer and lots of Degreaser.

Setting the TPS is relatively simply. It is only a simple three wire device. Essentially a dual switch which breaks continuity across one wire when throttle is just cracked open. And creates continuity across the alternate wire when WOT is reached.

 

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Note I used a feeler gauge between the throttle stop and butterfly lever. I managed to get very tight in tolerance and continuity was broken with just a 0.05 mm feeler gauge. Whether that is factory specs or not ?? The main thing is the TPS now works as supposed to, Throttle CLOSED, OPEN and WOT.

 

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Haven’t done a lot on this last few weeks. But the bulk of the work has been removing parts and cleaning. Cylinder intake ports and valves were gunked up also (what a surprise) so cleaned them all up. As well as removed and cleaned idle thermo control. Meanwhile entire idle control hose assembly has been soaking in rubber reconditioner which has returned them to like new.

 

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Here is all the idle control hose assembly, all cleaned and reconditioned. Originally these hose were hard as a rock, now soft as new rubber. Soaked for about 2 weeks.

 

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new fuel injectors, O rings and seals installed today. Along with idle hoses and cold start injector.
Also fitted harmonic balancer, alternator / wiring, water pump and thermostat housing. Plus a few more small items.

 

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Here is all the idle control hose assembly, all cleaned and reconditioned. Originally these hose were hard as a rock, now soft as new rubber. Soaked for about 2 weeks.

Impressive job you are doing!
Those hoses look new.

Tell us please, what rubber conditioner was used here?

M

 

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I believe in doing things properly or not at all
To be honest I couldn't believe how much carbon and junk was on the intake, I bet a lot of the old mercs would benefit from a good intake clean. This originally being an EGR car likely made things worse.

The conditioner was Wintergreen oil. Amazing stuff at rejuvenating rubber. Mixture I used was 3:1 Isopropyl alcohol and wintergreen oil.

The wintergreen oil is pricey stuff but you don't need too much (200ml is what i used). I used a flat tupperware container that allowed the parts to be covered. After a few days could tell a difference. 1 week marked improvement, 2 weeks better again.