Author Topic: Preparing a tank for POR 15/bare tank, no cap or petcock  (Read 2105 times)

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jsaab2748

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Preparing a tank for POR 15/bare tank, no cap or petcock
« on: February 15, 2006, 10:39:54 PM »
I had dents removed from a 550 K tank.
Tank is now in primer, want to treat it before painting begins. Any suggestions or methods for plugging the petcock and fuel fill holes? Petcock is oval shaped where it connects to tank and also has two threaded holes for the retaining screws. (early style petcock with two outlets, a la 750 thru k4) Not sure what will work best. Any suggestions much appreciated...jim :)

theunrulychef

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Re: Preparing a tank for POR 15/bare tank, no cap or petcock
« Reply #1 on: February 16, 2006, 05:47:08 AM »
Before I decided to ditch the metal tank project & proceed w/ my fiberglass tank, I was trying to remove the liner in my SuperSport tank after I put knee inserts in.  The PO had sealed over rust w/ what was apparently POR-15.  That stuff will never ever come out - most of the time that's a good thing, but not in my case.  I also had cut out the filler neck indentation & welded in a new plate w/ a hole for an aluminum flip top cap (but hadn't sealed the cap in yet), so my situation was similar to yours.  I sloshed all different types of chemicals around in the tank trying to get the stuff out. 

Here's how I sealed it up:  I used a rubber stopper in the petcock hole, then threaded a pipe cap on the the tube coming out of the tank.  Since yours doesn't have that, I would try to put a rubber stopper in the hole & thread bolts in the other 2 holes.  Then duct tape (the real aluminum duct tape worked pretty well).  For the filler hole, I took the old gas cap & put it over the hole I had (no neck, so it just covered the hole) & taped it down.  I left the vent hole open so that I could put a piece of tape on it while I was sloshing around, then vent it when I was letting it sit.

This wasn't leakproof, but I didn't get much nasty stuff on me or the garage floor.  You might eat off some primer, but keep wiping down anything that leaks out & you should be ok.  Worst case is you have to re-prime it.

Also, I would check out the FAQs.  I think Bob Wessner has a pretty good write up of what he did to his tank.  If I remember correctly, that's where I got the idea to use tape, but I'm not sure.

Good luck,
Jay in Philly

Offline Magpie

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Re: Preparing a tank for POR 15/bare tank, no cap or petcock
« Reply #2 on: February 16, 2006, 07:38:41 AM »
On my 750 tank I used lots of tape on the filler hole and made a small, wooden cover plate, drilled two holes in it to match the holes for the petcock screws and used those two screws to mount the plate covering the hole. It worked fine. So well in fact that I didn't mark my painted tank using the Creme (spelling?) process. Should be a piece of cake with a primer tank.
Cliff.

Teach

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Re: Preparing a tank for POR 15/bare tank, no cap or petcock
« Reply #3 on: February 16, 2006, 08:50:35 AM »
I jsut lined the tank on my 78 750F last night.  I used Kreem, but the technique may work for POR15 as well.  All I did for the fuel filler was put some plastic (in my case a very thick garbage bag) over the filler hole before I put the gas cap on.  This kept the Kreem off of the gas cap and cleaned (Kleened?) up pretty easily.  I plugged the petcock with a foam type ear plug, but the Methyl ethyl ketone pre kreem rinse did a number on that.  I figure plastic around the ear plug would work better if I ever do it again (and a pray that I don't, cause it's annoying, especially on an F tank with the recessed filler.)

jsaab2748

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Re: Preparing a tank for POR 15/bare tank, no cap or petcock
« Reply #4 on: February 16, 2006, 02:40:45 PM »
Thanks for the "push" guys. I've got a game plan now.  ;D

Offline CB500_k2

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Re: Preparing a tank for POR 15/bare tank, no cap or petcock
« Reply #5 on: February 16, 2006, 05:58:42 PM »
I did a Kreem treatment of my CB500 tank last winter.  I used a small piece of wood to which I glued a strip of rubber sheet. I drilled two holes to match the petcock attachment and secured the strip (rubber towards the tank) to the bottom of the tank.  I found a rubber stopper at the hardware store to fit the fuel port in the top of the tank.  This sealed the tank for the phosphoric acid rust removal as well as the MEK wash and the Kreem application.  There was no leakage at all.  The results were completely successful and no rust has formed in the tank since.
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Offline n9viw

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Re: Preparing a tank for POR 15/bare tank, no cap or petcock
« Reply #6 on: February 16, 2006, 07:26:24 PM »
I've heard both good and bad about Kreem, but in recent years, more bad than good. My own experience with it was bad, and I didn't even use it! Went to replace the leaking petcock on my father's '80 CX500, and couldn't get the filter out for love nor money. Turns out the PO Kreemed the tank with the FILTER IN! And then wondered why he couldn't get any fuel flow! The screens were all torn out, probably with a screwdriver, and an inline filter was added. D'oh!  :o
He hasn't gotten to the 'flaking Kreem' stage yet, but I imagine it's coming soon enough. I'm a fierce POR-15 proponent, both for their tank liner and their regular product. Best stuff I've ever used.
Nick

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'73 Honda CB750k

Offline cbjunkie

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Re: Preparing a tank for POR 15/bare tank, no cap or petcock
« Reply #7 on: February 16, 2006, 09:35:31 PM »
word. POR-15 ONLY. Why? it's a chemical, integral bond with the metal not an applied layer of polymer.

KREEM is like blowing up a balloon inside your tank...one day it's gonna pop in there and you are going to have bit and pieces floating around...
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