 Type 4 oil pump rebuild, Comparison of OEM vs. Samba CNC pump |
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| Superhawk996 |
 May 26 2019, 05:51 PM
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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 
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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. |
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| Mark Henry |
May 26 2019, 05:59 PM
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Personally I'd use a new modified T1 pump and a steel cover. (IMG:style_emoticons/default/smile.gif)
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| Superhawk996 |
May 26 2019, 06:07 PM
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#3
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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
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QUOTE(Mark Henry @ May 26 2019, 07:59 PM)  Personally I'd use a new modified T1 pump and a steel cover. (IMG:style_emoticons/default/smile.gif) I looked at that option. Seems to simple. (IMG:style_emoticons/default/happy11.gif) I really would like to keep type 4 pump. I'm an engineer - I basically look at things from the perspective of why wouldn't VW have used a type 1 pump in the 1st place if it was up to the task. Don't want a 30mm Type 1 pump. I couldn't seem to find a 26mm modified type 1 pump. It also seems that previous threads on this site and others indicated that type 1 pumps are having some issues sealing properly to the case. Maybe I'm mistaken. Has the leakage situation changed? Open to a good source for such a 26mm type 1 pump and don't want to negate anyone's prior experience if they are using Type 1 pumps and happy with them. I really don't want to deal with band aids if I can avoid them. Part of my goal is to keep my 2.0L engine stock. But, I admit I'm working on my own Band Aid. (IMG:style_emoticons/default/sheeplove.gif) Plus I needed a reason to play with machine tools on this holiday weekend! (IMG:style_emoticons/default/lol-2.gif) |
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Posts in this topic
Superhawk996 Type 4 oil pump rebuild May 26 2019, 05:51 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 Superhawk996 Ultimately I may machine up some sort of test fixt... May 26 2019, 06:26 PM 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 |
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