Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
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.
 

Welcome Guest ( Log In | Register )

 
 Reply to this topicStart new topic
> Gas tank, buy new or get cleaned out?
hndyhrr
post Oct 8 2025, 01:04 PM
Post #1


Senior Member
***

Group: Members
Posts: 678
Joined: 1-September 13
From: central point,oregon
Member No.: 16,332
Region Association: Pacific Northwest
the pumpkin's gas tank has black flakes in it when I looked with the borescope. Should I have it cleaned(boiled?) out or should I get a new one. If cleaned out do radiator shops do that?

Thanks

Renee
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
hndyhrr
post Oct 8 2025, 05:44 PM
Post #2


Senior Member
***

Group: Members
Posts: 678
Joined: 1-September 13
From: central point,oregon
Member No.: 16,332
Region Association: Pacific Northwest
QUOTE(hndyhrr @ Oct 8 2025, 12:04 PM) *

the pumpkin's gas tank has black flakes in it when I looked with the borescope. Should I have it cleaned(boiled?) out or should I get a new one. If cleaned out do radiator shops do that?

Thanks

Renee



Welp found out there are no radiator shop still open in Medford, Oregon.

I will clean it out myself.


(IMG:style_emoticons/default/driving-girl.gif)
(IMG:style_emoticons/default/beerchug.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
thomasotten
post Oct 9 2025, 01:58 AM
Post #3


Senior Member
***

Group: Members
Posts: 1,575
Joined: 16-November 03
From: San Antonio, Texas
Member No.: 1,349
We coated the inside of our 924S with the gas tank kit from POR-15. Follow all the steps and it should turn out good. Be sure to check for pinholes near where the gas tank rests on the carpet support, they usually corrode there from the outside.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
mlindner
post Oct 9 2025, 04:49 AM
Post #4


Senior Member
***

Group: Members
Posts: 1,774
Joined: 11-November 11
From: Merrimac, WI
Member No.: 13,770
Region Association: Upper MidWest
I just used POR15 tank sealer and it worked great, takes four days to cure. POR15 has a cleaner to use first, then seal.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
914werke
post Oct 9 2025, 10:07 AM
Post #5


"I got blisters on me fingers"
**********

Group: Members
Posts: 11,664
Joined: 22-March 03
From: USofA
Member No.: 453
Region Association: Pacific Northwest
(IMG:style_emoticons/default/slap.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
GeorgeKopf
post Oct 9 2025, 02:45 PM
Post #6


Member
**

Group: Members
Posts: 260
Joined: 9-February 21
From: Princeton, NJ
Member No.: 25,186
Region Association: MidAtlantic Region
I am in the process of cleaning out my gas tank. I used electrolysis to pull out the rust. Ran the process for a week.

DM me if you want to chat about the process.

Attached Image
Attached Image
Attached Image
Attached Image
Attached Image

Now I'm going to use the KBS gas tank sealing kit as the final step.

George
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
hndyhrr
post Oct 9 2025, 05:55 PM
Post #7


Senior Member
***

Group: Members
Posts: 678
Joined: 1-September 13
From: central point,oregon
Member No.: 16,332
Region Association: Pacific Northwest
Thanks guys.

Just bought a new tank, that is the easy way ...... not the cheap way lol.

I am thinking i will need to flush out new tank before install.

What to use for that?

Gas?, soapy water?



Renee
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Jack Standz
post Oct 9 2025, 08:13 PM
Post #8


Senior Member
***

Group: Members
Posts: 795
Joined: 15-November 19
From: Happy Place (& surrounding area)
Member No.: 23,644
Region Association: None
Probably a good idea to replace it, especially if the flakes you saw were corrosion.

It's very discouraging to go to all the work to refurbish a gas tank only to have it leak. If you have one leak, how long untill another pinhole pops up? And, I've read that some sealants end up failing. But, don't know, never used it other than a small puncture fixed with some special epoxy putty stuff on a car that wasn't worth making a proper fix.

As for cleaning the new tank, either not necessary or you could slosh some gas around inside, especially if you see any dirt from manufacturing. Just looked at a brand new tank and can't see any dirt ir debris inside it.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
nivekdodge
post Oct 10 2025, 10:15 AM
Post #9


Member
**

Group: Members
Posts: 335
Joined: 28-August 21
From: Pittsburgh Pa
Member No.: 25,860
Region Association: MidAtlantic Region
Not looking to steal the thread but since the big guns are in here, should the op, or can the op convert to threaded AN style fittings all the way back?

kevin
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Artfrombama
post Oct 10 2025, 10:46 AM
Post #10


Artfrombama
**

Group: Members
Posts: 453
Joined: 21-January 24
From: One of the chosen few
Member No.: 27,870
Region Association: South East States
QUOTE(hndyhrr @ Oct 9 2025, 06:55 PM) *

Thanks guys.

Just bought a new tank, that is the easy way ...... not the cheap way lol.

I am thinking i will need to flush out new tank before install.

What to use for that?

Gas?, soapy water?



Renee

Test fit before you add anything flammable to the tank.
I bought a new tank, although ordered for a 74 the top bracket and side tab were not there. Removed them from my old tank and welded on the replacement tank.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
914Sixer
post Oct 10 2025, 11:24 AM
Post #11


914 Guru
*****

Group: Members
Posts: 9,482
Joined: 17-January 05
From: San Angelo Texas
Member No.: 3,457
Region Association: Southwest Region
Got a Liland tank today. Will be posting up pictures later today.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
bajafreaks
post May 16 2026, 04:34 PM
Post #12


Member
**

Group: Members
Posts: 136
Joined: 7-February 14
From: Gardnerville, Nevada
Member No.: 16,969
Region Association: Northern California
QUOTE(914Sixer @ Oct 10 2025, 10:24 AM) *

Got a Liland tank today. Will be posting up pictures later today.

How did the tank work out for you? I'm looking at the same brand.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
tomeric914
post May 16 2026, 07:24 PM
Post #13


One Lap of America in a 914!
***

Group: Members
Posts: 1,324
Joined: 25-May 08
From: Syracuse, NY
Member No.: 9,101
Region Association: North East States
QUOTE(bajafreaks @ May 16 2026, 06:34 PM) *

How did the tank work out for you? I'm looking at the same brand.

Liland is here in East Syracuse, NY. I drive by it often. I can stop in and see if they would let me take pictures of a tank if that would be helpful.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
JamesJ
post May 16 2026, 07:37 PM
Post #14


Member
**

Group: Members
Posts: 285
Joined: 30-April 20
From: Sunnyvale, CA
Member No.: 24,202
Region Association: Northern California
Things may have changed now, but about 4 years ago I met a 914 owner who purchased a new Dansk tank and regretted doing so due to fitment issues.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Jack Standz
post May 16 2026, 09:40 PM
Post #15


Senior Member
***

Group: Members
Posts: 795
Joined: 15-November 19
From: Happy Place (& surrounding area)
Member No.: 23,644
Region Association: None
QUOTE(nivekdodge @ Oct 10 2025, 11:15 PM) *

Not looking to steal the thread but since the big guns are in here, should the op, or can the op convert to threaded AN style fittings all the way back?

kevin


If you replace the original plastic lines that are routed through the tunnel inside the car, it's not really a great idea to run AN (-6 or -8) fittings on solid stainless lines because the holes for the fuel lines routed through the firewall and the front of the footwell area aren't big enough unless you hack them up pretty good or install the fittings on each end after you've run them through the tunnel/firewall. Doable, but not so much fun (IMG:style_emoticons/default/biggrin.gif)

But if you plan to do it, consider using Teflon braided stainless steel lines. We had Chris Foley weld some AN fittings on the rear end of his feed and return lines and called it good.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
bajafreaks
post May 17 2026, 10:28 AM
Post #16


Member
**

Group: Members
Posts: 136
Joined: 7-February 14
From: Gardnerville, Nevada
Member No.: 16,969
Region Association: Northern California
QUOTE(tomeric914 @ May 16 2026, 06:24 PM) *

QUOTE(bajafreaks @ May 16 2026, 06:34 PM) *

How did the tank work out for you? I'm looking at the same brand.

Liland is here in East Syracuse, NY. I drive by it often. I can stop in and see if they would let me take pictures of a tank if that would be helpful.

If you want thats fine, but dont make a special trip.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 17th May 2026 - 03:39 PM
Invision Power Board v9.1.4 © 2026  IPS, Inc.
...
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...