 Type 4 oil pump rebuild, Comparison of OEM vs. Samba CNC pump |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| Superhawk996 |
 May 26 2019, 05:51 PM
Post
#1
|
|
914 Guru  Group: Members Posts: 6,663 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch 
 |
Playing with the idea of what it will take to rebuild a type 4 pump.
The pump that came out of my 2.0L engine is trashed from pumping rust. Both the gears and the housings are seriously scored.  I figured I'd roll the dice and see what might be on Ebay. Took a gamble and bought a used pump hoping I might get some core parts that are useful.  I did end up with a good housing outer. However, the gears are pitted and it the inner housing plate either has a serious casting flaw, or some sort of galvanic corrosion that pitted it. I always struggle with this kind of thing. It really would have minimal effect on the pump and it probably worked OK for a lot of years. However, I'd just like to know that it is perfect going before going into a engine.   It looks like new inner plates are available but at a cost of $150+. I decided that since I have a donor "scrap" pump, I have nothing to lose by experimenting with machining it. |
   |
 
|
  |
Replies
| Superhawk996 |
May 26 2019, 06:26 PM
Post
#2
|
|
914 Guru Group: Members Posts: 6,663 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
|
Ultimately I may machine up some sort of test fixture to see if I can convince myself that a rebuilt pump is indeed viable.
Still scratching my head on how to best determine what the head pressure is of the engine oiling circuit. May just have to put a valve in the system and then tune it to match typical cold start oil pressures. (IMG:style_emoticons/default/idea.gif) Seems crazy to me that Type 4 pumps are No Longer Available and those pieces that you can find are astronomical in price. Something like $400 for an outer housing, $150 for the inner housing plate. The driven gear is also NLA. Porsche pisses me off with this nonsense. (IMG:style_emoticons/default/WTF.gif) They love to claim that 70% of Porsche's are still on the road yet do very little to enable those of us trying to keep them on the road. Thanks for nothing while taking the credit for the work owners go to, just to find a way to work around Porsche! Typical Corporate double speak. https://www.porsche.com/international/acces...ervice/classic/ |
|
|
|
Posts in this topic
Superhawk996 Type 4 oil pump rebuild May 26 2019, 05:51 PM
Mark Henry Personally I'd use a new modified T1 pump and ... May 26 2019, 05:59 PM
Superhawk996
Personally I'd use a new modified T1 pump and... May 26 2019, 06:07 PM Superhawk996 I decided to start with my original pump inner hou... May 26 2019, 06:02 PM North Coast Jim I bought a new Melling pump. Made in Michigan from... May 26 2019, 06:10 PM Superhawk996
I bought a new Melling pump. Made in Michigan fro... May 26 2019, 06:23 PM Superhawk996 @North_Coast_Jim
How many miles on the melling? ... May 27 2019, 04:50 AM North Coast Jim
@North_Coast_Jim
How many miles on the melling? ... May 27 2019, 06:01 AM Superhawk996 So here is the cover with just a skim cut and the ... May 26 2019, 06:19 PM 914sgofast2 There is a thread over on the Samba with a step by... May 28 2019, 08:17 AM Valy Number 1 reason for failing oil pumps is the idle ... May 26 2019, 09:40 PM Superhawk996
Number 1 reason for failing oil pumps is the idle... May 27 2019, 04:28 AM Valy @Superhawk996
It works well, no issues so far but... May 27 2019, 02:12 PM Mark Henry T1 mod is easy if you have a lathe, you just have ... May 28 2019, 09:33 AM Superhawk996 Given that I'm a mechanical masochist I haven... Aug 4 2019, 10:59 AM 914sgofast2 Try visiting The Samba.com website and go to the 4... Aug 4 2019, 12:22 PM Superhawk996 :agree:
Been there before.
https://www.thesamb... Aug 4 2019, 01:00 PM Archie I've had one listed on FS/WTB for a couple of ... Aug 4 2019, 05:17 PM Superhawk996 Time to light up an old thread. I continue to bui... Sep 19 2021, 10:02 AM Superhawk996 Used T4 mystery pump.
Heres a caution to anyone ... Sep 19 2021, 10:59 AM Superhawk996 T4 Mystery Pumps -- The plot thickens
Recently bo... Dec 6 2021, 10:51 AM Nogoodwithusernames Another thing to keep an eye out for is the small ... Dec 6 2021, 01:13 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 15th January 2025 - 09:20 AM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.