XJ40 ( XJ81 ) 1986 - 1994

1987 Sovereign 3.6 XJ40 Fuel Tank

 
  #1  
Old 05-06-2019, 09:10 PM
Junior Member
Thread Starter
Join Date: Jan 2017
Location: Sarsfield, Victoria
Posts: 3
Likes: 0
Received 2 Likes on 2 Posts
Default 1987 Sovereign 3.6 XJ40 Fuel Tank

When cleaning out the fuel tank prior to coating with POR-15 sealer, I used an air gun to dry it out but the air gun moved when I was absent and burnt a small 2mm dia hole in the top of a blue plastic tank(??) within the main metal tank. The outlet and return hoses are connected to this blue plastic thing but I canít see whether itís actually a tank or just a baffle.

The tank does not have an internal fuel pump, that was on later models. I havenít been able to find anything on the internet and local Jaguar dealers have been unable to assist. Only the complete tank is shown in the parts catalog with no internals.

Can someone tell me if this is actually a tank and is it pressurized, or is it just merely a baffle?

Thanks

 
  #2  
Old 05-06-2019, 11:03 PM
Join Date: Feb 2014
Location: The Beautiful Mid-South, U.S.A.
Posts: 16,528
Received 7,573 Likes on 4,230 Posts
Default

Originally Posted by ruggers View Post
When cleaning out the fuel tank prior to coating with POR-15 sealer, I used an air gun to dry it out but the air gun moved when I was absent and burnt a small 2mm dia hole in the top of a blue plastic tank(??) within the main metal tank. The outlet and return hoses are connected to this blue plastic thing but I canít see whether itís actually a tank or just a baffle.

The tank does not have an internal fuel pump, that was on later models. I havenít been able to find anything on the internet and local Jaguar dealers have been unable to assist. Only the complete tank is shown in the parts catalog with no internals.

Can someone tell me if this is actually a tank and is it pressurized, or is it just merely a baffle?

Thanks
Hi ruggers,

Our member Rob Evenson renovated the fuel tank on his '88 or '89 and may know the answer to your question. I'm going to send him a private message to see if he may be able to chime in. He's been very busy in life and hasn't been able to participate in the forum much lately.

I assume from your description that part 5 in the diagram below is not the part you are inquiring about. It's called the "fuel tank seal."




Hopefully Rob will be able to respond.

Cheers,

Don
 
  #3  
Old 05-06-2019, 11:31 PM
Junior Member
Thread Starter
Join Date: Jan 2017
Location: Sarsfield, Victoria
Posts: 3
Likes: 0
Received 2 Likes on 2 Posts
Default


Fuel tank

Hole burnt though plastic - was blue originally but now covered in sealer
Hello Don,

The blue plastic tank/baffle is actually inside the tank and can't be replaced without opening the tank by cutting through the spot welds, or by cutting a large hole in the tank. See the attached photos - the blue plastic has now been coated by the silver POR-15 sealer.
 
The following users liked this post:
Don B (05-07-2019)
  #4  
Old 05-07-2019, 06:30 PM
Rob Evenson's Avatar
Senior Member
Join Date: May 2012
Location: Mobile, AL USA
Posts: 491
Received 245 Likes on 167 Posts
Default

Ruggers,

From what I could discern from the lack of info available regarding the interior of these tanks,I also concluded it to be a baffle. I do believe mine is metal, but could be wrong.

I urge you to be cautious before installing the tank. I also purchased the POR15 interior sealer and decided not to use it because of the baffling. In my mind, there was no way I could assure there was perfect coverage on the entire interior of the tank. All you need is a small gap of incomplete coverage, or very thin/weak coverage, for the sealant material to start dislodging from the surface and float down to the fuel supply lines to the pump. On my model, the filter is after the pump. I envisioned the sealant material clogging the fuel pump, so I elected to not coat the interior of the tank. From what I could see, the interior on mine was very clean, further the tank rusted from the outside, not from within. If there was no baffling system, I would have used the sealant product. You may want to consider filling the tank with water and vigorously sloshing the water inside the tank a few times before re-installing.

I have a photo album of my completed tank refurbish in my profile if interested. What I decided to do was add the layer of fiberglass on the bottom and then several generous coats of POR15 paint to the exterior, especially the bottom. Word of caution on the extra paint layers, it was a challenge to re-install. Amazing how a few layers of paint made re-fit very tight.

Best of luck to you

Don....anytime!
 
The following users liked this post:
Don B (05-07-2019)
  #5  
Old 05-07-2019, 07:07 PM
Junior Member
Thread Starter
Join Date: Jan 2017
Location: Sarsfield, Victoria
Posts: 3
Likes: 0
Received 2 Likes on 2 Posts
Default

Thanks Rob and Don

I will rinse it again thoroughly before reinstalling, and while I am quite confident the metal tank is coated properly, I am not confident the sealer may not flake off the plastic. I looked into the tank with an endoscope a few times throughout and I initially assumed the plastic bits were baffles for the pick-up tube, even though it looked like it already had metal baffles - it's difficult to see inside with the plastic fitting in the way. That's why I raised the question about the purpose of the blue plastic fitting.

I'll try pouring some fuel onto the plastic to see if any sealer comes off before I go to the trouble of reinstalling. I can't believe it's not even documented.
 
The following users liked this post:
Don B (05-07-2019)
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
tezza46
XJ40 ( XJ81 )
1
03-02-2018 09:25 AM
karlward96
XJ6 & XJ12 Series I, II & III
9
06-29-2017 07:37 PM
gthawk1
XJS ( X27 )
3
12-14-2015 05:13 PM
Scubbs
XJ40 ( XJ81 )
6
09-27-2010 07:11 PM
madandcrazy
XJ40 ( XJ81 )
2
09-16-2009 04:03 AM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Quick Reply: 1987 Sovereign 3.6 XJ40 Fuel Tank


Advertising
Featured Sponsors
Vendor Directory

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: