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Forum: Vintage Mercedes Forum

12-03-2009, 06:56 PM

Replies: 27

'73 450SE - should I replace intake manifold seals?

Views: 4,027

Posted By a5a1234

Hi Graham. Thanks once again for your input. I...

Hi Graham. Thanks once again for your input. I did the fuel pressure tests as specified in 07.4-120 of the service manual (a couple of weeks ago). Pressure was solid at 28 psi when the pump was...

Forum: Vintage Mercedes Forum

12-03-2009, 03:45 PM

Replies: 27

'73 450SE - should I replace intake manifold seals?

Views: 4,027

Posted By a5a1234

Thanks Graham. You may have hit the problem...

Thanks Graham. You may have hit the problem exactly. I started the car this morning (cold start) and it started and idled without any issues, so it looks as if vapor lock may be the problem. From...

Forum: Vintage Mercedes Forum

12-03-2009, 02:48 AM

Replies: 27

'73 450SE - should I replace intake manifold seals?

Views: 4,027

Posted By a5a1234

I took the car to the local garage today, to use...

I took the car to the local garage today, to use the exhaust gas analyzer. The first thing we noticed was that the car was running *very* rich at idle - over 6% CO! So I adjusted that back to about...

Forum: Vintage Mercedes Forum

11-28-2009, 12:33 PM

Replies: 27

'73 450SE - should I replace intake manifold seals?

Views: 4,027

Posted By a5a1234

Thanks very much Graham. I hope to get to the...

Thanks very much Graham. I hope to get to the analyzer next week.

Joe

Forum: Vintage Mercedes Forum

11-13-2009, 12:03 AM

Replies: 27

'73 450SE - should I replace intake manifold seals?

Views: 4,027

Posted By a5a1234

Success! Well... a great deal better anyway....

Success! Well... a great deal better anyway. Thanks so much to everyone who helped out with advice. I took the car out today (three times, with cool-off in between, to test). Some smoke initially, as...

Forum: Vintage Mercedes Forum

11-11-2009, 07:26 PM

Replies: 27

'73 450SE - should I replace intake manifold seals?

Views: 4,027

Posted By a5a1234

Thanks everyone. I checked the oil today -...

Thanks everyone.

I checked the oil today - it was thinner, so I did an oil change. The old oil certainly smelled of gasoline!

I cleaned the PCV valve with some carb cleaner.
I cleaned the...

Forum: Vintage Mercedes Forum

11-09-2009, 11:33 PM

Replies: 27

'73 450SE - should I replace intake manifold seals?

Views: 4,027

Posted By a5a1234

I think I'll leave the MAP sensor alone for the...

I think I'll leave the MAP sensor alone for the moment - there are more things to be corrected first, it seems.

Timing
I was able to adjust timing this evening.
With vacuum line to distributor...

Forum: Vintage Mercedes Forum

11-08-2009, 11:18 PM

Replies: 27

'73 450SE - should I replace intake manifold seals?

Views: 4,027

Posted By a5a1234

Thanks Graham. I did the fuel system check...

Thanks Graham.

I did the fuel system check two weeks ago. Pressure is 28 psi. Pressure wouldn't hold, so I carried on with the tests in the service manual, and found two leaking injectors (already...

Forum: Vintage Mercedes Forum

11-08-2009, 10:31 PM

Replies: 27

'73 450SE - should I replace intake manifold seals?

Views: 4,027

Posted By a5a1234

Thanks Graham, Tomguy. Having your help in this...

Thanks Graham, Tomguy. Having your help in this is fantastic!

I have attached a (poor) quality picture showing my MAP sensor with a 4 mm Allen key in the screw. The Allen key does not make contact...

Forum: Vintage Mercedes Forum

11-08-2009, 07:23 PM

Replies: 27

'73 450SE - should I replace intake manifold seals?

Views: 4,027

Posted By a5a1234

Thanks Graham! Here's the progress - not much...

Thanks Graham! Here's the progress - not much today...

Vacuum measured at the manifold - short rubber tube at rear of engine on passenger side - before vacuum check valve on firewall - still only...

Forum: Vintage Mercedes Forum

11-07-2009, 07:29 PM

Replies: 27

'73 450SE - should I replace intake manifold seals?

Views: 4,027

Posted By a5a1234

Many thanks to GGR, Tomguy and Graham for their...

Many thanks to GGR, Tomguy and Graham for their very helpful comments.

I had to wait until today to get some time to work on the car. Here is my progress report...

1. Air idle valve - when...

Forum: Vintage Mercedes Forum

11-05-2009, 01:02 AM

Replies: 27

'73 450SE - should I replace intake manifold seals?

Views: 4,027

Posted By a5a1234

'73 450SE - should I replace intake manifold seals?

Before I get into replacing the air intake manifold gaskets and plenum
seals, is there anything I have missed? Apologies in advance for the long
posting - wanted to give a fairly complete run-down...

Forum: Vintage Mercedes Forum

10-28-2009, 09:12 PM

Replies: 1

'73 450SE fuel injector part # seems wrong

Views: 744

Posted By a5a1234

'73 450SE fuel injector part # seems wrong

I pulled the fuel injectors from my '73 450SE to have them cleaned - two were leaking. I noticed that the part number is not what I expected. These injectors have the number 0 280 150 015 imprinted....

Forum: Vintage Mercedes Forum

10-18-2009, 09:46 PM

Replies: 6

'73 450 SE MAP sensor electrical connection

Views: 1,325

Posted By a5a1234

Thanks very much Ron and Tom. It looks as if...

Thanks very much Ron and Tom.

It looks as if I have my connection inserted the right way :-) But it may not matter! That's one thing less to worry about.

Joe

Forum: Vintage Mercedes Forum

10-18-2009, 08:10 PM

Replies: 6

'73 450 SE MAP sensor electrical connection

Views: 1,325

Posted By a5a1234

Thanks Ron. Looking to the fender from the engine...

Thanks Ron. Looking to the fender from the engine side, the current order of the wires is:
Engine - Black/White - Red/White - Blue/White - Green/White - Fender.

Joe

Forum: Vintage Mercedes Forum

10-17-2009, 09:42 PM

Replies: 6

'73 450 SE MAP sensor electrical connection

Views: 1,325

Posted By a5a1234

'73 450 SE MAP sensor electrical connection

I am a bit embarrassed to have to ask this but...

I was cleaning the electrical connection to my MAP sensor this afternoon ('73 450SE D-Jet). After I was done, I realized that the electrical...

Forum: Vintage Mercedes Forum

08-21-2008, 09:41 AM

Replies: 11

replacing transmission modulator '73 450SE

Views: 2,918

Posted By a5a1234

Thanks for the "heads up" Peter & Hal. I'll check...

Thanks for the "heads up" Peter & Hal. I'll check the brake booster take-off, and I guess I had better go back and look again at the manifold seals. But I am hoping that swapping out the transmission...

Forum: Vintage Mercedes Forum

08-20-2008, 11:15 PM

Replies: 11

replacing transmission modulator '73 450SE

Views: 2,918

Posted By a5a1234

Hi Peter, Yes, the vacuum is low enough to...

Hi Peter,

Yes, the vacuum is low enough to make the car run very rich, and it is smoky. I am working through the possible sources of leaks. I have replaced all the rubber vacuum lines under the...

Forum: Vintage Mercedes Forum

08-19-2008, 09:25 AM

Replies: 11

replacing transmission modulator '73 450SE

Views: 2,918

Posted By a5a1234

Thanks very much 230/8 and Jengasan - I feel "set...

Thanks very much 230/8 and Jengasan - I feel "set to go now". Halw540, I found the modulator in three places - my local dealership - too expensive; a place in NY - diyautoparts.com; and the place I...

Forum: Vintage Mercedes Forum

08-18-2008, 10:43 AM

Replies: 11

replacing transmission modulator '73 450SE

Views: 2,918

Posted By a5a1234

Thanks very much for your help Jengasan! This is...

Thanks very much for your help Jengasan! This is just what I needed to know. I will go ahead and replace the modulator. I believe I have been getting AT fluid sucked into the manifold - smoke issues....

Forum: Vintage Mercedes Forum

08-17-2008, 02:07 AM

Replies: 11

replacing transmission modulator '73 450SE

Views: 2,918

Posted By a5a1234

replacing transmission modulator '73 450SE

I am tracking down a vacuum leak that seems to have recently developed (or got worse) in my '73 450SE. I traced the vacuum line from manifold to transmission modulator - stainless steel all the way,...

Forum: Vintage Mercedes Forum

08-15-2008, 01:22 AM

Replies: 2

'73 450 SE (W116) - checking system vacuum?

Views: 894

Posted By a5a1234

Thanks very much carnut. At least I now know that...

Thanks very much carnut. At least I now know that I can't tell how good the vacuum system is using the method I described :). I have been trying to track down a vacuum leak. I replaced the MAP hose,...

Forum: Vintage Mercedes Forum

08-12-2008, 11:24 PM

Replies: 8

W116 hubcaps and bumper questions

Views: 1,644

Posted By a5a1234

Thanks very much for your replies, gentlemen. I...

Thanks very much for your replies, gentlemen. I appreciate your "sharing the knowledge"! I find these kind of small details very difficult to track down (despite using books and the Internet). The...

Forum: Vintage Mercedes Forum

08-09-2008, 12:27 AM

Replies: 8

W116 hubcaps and bumper questions

Views: 1,644

Posted By a5a1234

W116 hubcaps and bumper questions

Hello All,

Would someone be able to tell me in what year the W116 wheels changed from hubcaps to "Bundt"-type?

The hubcap wheels were 14". Were the Bundt wheels also 14"?

Secondly, did the...

Forum: Vintage Mercedes Forum

08-09-2008, 12:22 AM

Replies: 2

'73 450 SE (W116) - checking system vacuum?

Views: 894

Posted By a5a1234

'73 450 SE (W116) - checking system vacuum?

Hello All,

A quick vacuum testing question, if I may...

1973 450 SE (D-Jet). If I disconnect the vacuum line at the MAP sensor, and leave the other end connected to the engine, should I be able...

Forum: Vintage Mercedes Forum

06-02-2008, 01:14 AM

Replies: 6

Signal Flashers

Views: 1,285

Posted By a5a1234

Yes, I thought that too, but all of my bulbs...

Yes, I thought that too, but all of my bulbs light up appropriately.

Forum: Vintage Mercedes Forum

06-01-2008, 02:39 AM

Replies: 6

Signal Flashers

Views: 1,285

Posted By a5a1234

flasher info

I have the same car and the same problem. I took the 4-way flasher switch out, and there is nothing under there - it is just a simple switch in our cars. The flasher control is located on the left...

Forum: Vintage Mercedes Forum

10-29-2007, 06:08 PM

Replies: 3

'73 450SE EFI trigger points orientation

Views: 1,062

Posted By a5a1234

Thanks!

Thanks very much guys! I couldn't track this information down from my usual sources - Haynes manual, Chilton's manual, Service & Maintenance manuals (CD) and a search of this site! I appreciate your...

Forum: Vintage Mercedes Forum

10-29-2007, 10:55 AM

Replies: 3

'73 450SE EFI trigger points orientation

Views: 1,062

Posted By a5a1234

'73 450SE EFI trigger points orientation

Hi All,

Could someone please confirm for me the orientation of the EFI trigger points tray? (1973 450SE, W116, M117). Does the elbow on the cable connection at the distributor point "up" or...

Forum: Vintage Mercedes Forum

10-24-2007, 01:00 AM

Replies: 19

1973 450SE intermittent problem - runs rough, loses power, blue smoke

Views: 4,455

Posted By a5a1234

update

Well I have an update on the car situation...

I bought a dwell/tach meter, and measured the dwell angle. Dwell was only 20.7*. I have the transistorized ignition (blue coil, two resistors), and so...

Showing results 1 to 30 of 45

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