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Author Topic: 1953 170DS oil gage line routing.  (Read 1582 times)

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Offline richard

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1953 170DS oil gage line routing.
« on: December 27, 2013, 03:59:25 PM »
Hi everyone:

I am trying to install my dashboard instrument cluster and hope someone can help me.

What is the routing of the oil line /lines from the filter housing to the pressure gauge?.  Where does it go  thru the firewall?  Is there a bulkhead fitting there?
Any under hood pictures of the firewall in this area would be helpful.

many thanks,
Richard

Offline braveman170

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Re: 1953 170DS oil gage line routing.
« Reply #1 on: December 28, 2013, 05:02:52 AM »

I hope that this one can help you.

Lars
1953 170Sb W191
1967 250SE W111 Coupé
1994 E320 W124 Convertible

Offline richard

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Re: 1953 170DS oil gage line routing.
« Reply #2 on: December 29, 2013, 04:42:38 PM »
Lars-

Thank you for the quick reply and picture.  Unfortunately it looks like my diesel is a little different.  The line to the guage cluster seems to be quite a bit smaller in diameter and different all together.

Anyone else with a diesel firewall picture?
As always, many thanks,
Richard

Offline John Ellis

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Re: 1953 170DS oil gage line routing.
« Reply #3 on: December 30, 2013, 12:45:07 AM »
The picture that Lars attached is correct (the down turned tubing with flex shown below the passenger side heater supply & return piping and flex).  The gauge piping is considerably larger in the engine bay.  On the passenger compartment side of the firewall the piping is smaller .... I am guessing about 2 mm diameter maximum?  Gauge piping for diesel and gasoline versions are identical.

See attached parts diagram for the 170DS.  Item 73 is inside the passenger compartment, items 74 and 77 are in the engine compartment.

« Last Edit: December 30, 2013, 01:01:59 AM by John Ellis »
John Ellis
1953 170Vb
1958 190
2007 Porsche Cayman

Offline richard

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Re: 1953 170DS oil gage line routing.
« Reply #4 on: January 06, 2014, 10:52:15 PM »
To John Ellis
Many thanks for the information on the oil pressure tubing. It was very usefull to learn that two tubes are in the engine compartment
and one is in the passenger compartment.
My tube (77)  is flexible and is 13" long.  It won't reach the firewall when screwed in the oil filter conntction.
My tube 74 is 17.5 " long (.125" dia.)with a 6" long center section of.195 "dia.  It has a bulkhead type fitting on one end which screws into tube 77.
This tube has a metal tab clamped around it.  The tab seems to provide for fixing to a flat surface as it has a hole for an M5 screw.
The last tube (77) is 9" long and screws onto the back of the pressure gauge.
The crazy thing to me is that the bulkhead connection is not at the firewall but it ends up unsupported somewhere between the filter and the firewall.
I still do not know if I have the coreect tubes, or thru what hole in the firewall they enter the engine compartment
I will study this further when weather permits; today's high was 30 degrees.
Thanks again for your help. I really appreciate it.  Richard