Frame Rust and Engine Rust - JeepForum.com

 
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post #1 of 13 Old 09-24-2010, 10:42 AM Thread Starter
AequitasVeritas
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Frame Rust and Engine Rust

Hey guys.

Picked up my 98 XJ about a month ago and have been working to get it running right and clearing the CEL's so I can get it inspected and registered. That is taken care of.

Now I am taking care of the rust issue. It is everywhere. Engine block and the front frame are the spots I am most worried about. Suspension components are obviously getting replaced with a lift kit.

I guess the question is, what is the best way to go about treating rust (the heavy flaking kind) on surfaces you cannot grind on? (i.e. Valve cover, head, block, etc)

Btw, I did search, but all I could find was body rust.


1998 XJ - "El Jefe" 4.0L | Superlift | Dunlop | Cragar | Bushwacker | Hypertech | OR-Fab | Hi-Lift | Pilot | Smitybilt |
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post #2 of 13 Old 09-24-2010, 11:27 AM
Millermagic
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Just how rusty are we talking? Can you get a picture? It's probably different in the south, but up here, once something has started rusting it's terminal and not much saving it.

For the "frame" you could hit everything you can with a wire wheel (or sand by hand) to get rod of all the rust. Then use some sort of rust treatment chemical or a zinc based primer to prime/paint the frame. If you want to do more paint, go for it!

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post #3 of 13 Old 09-24-2010, 12:44 PM Thread Starter
AequitasVeritas
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Well, the XJ came from up north. I will get some pics the next time I walk back to the shop.

Someone around here said something about Navy Gel. Thoughts?

1998 XJ - "El Jefe" 4.0L | Superlift | Dunlop | Cragar | Bushwacker | Hypertech | OR-Fab | Hi-Lift | Pilot | Smitybilt |
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post #4 of 13 Old 09-24-2010, 01:05 PM Thread Starter
AequitasVeritas
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Here are some pictures:














1998 XJ - "El Jefe" 4.0L | Superlift | Dunlop | Cragar | Bushwacker | Hypertech | OR-Fab | Hi-Lift | Pilot | Smitybilt |
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post #5 of 13 Old 09-24-2010, 01:18 PM
dukie564
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body - POR-15 (paint-over-rust) is great stuff, sand a bit to remove loose bits and coat it good with this paint.
engine - sand and use a high-temp enamel. Skip the exhaust header unless you plan on taking it off and baking it

1995 XJ Cherokee Sport
4.5" Homebrew Lift, 4.0L HO I-6, AX-15, NP231, D30(Open)/C8.25(Locked)
33x12.5 Mickey Thompson Baja MTZ Tires, 309,000 mi and runnin' strong

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post #6 of 13 Old 09-24-2010, 01:27 PM Thread Starter
AequitasVeritas
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Header isn't too much of a concern. I plan on replacing all the exhaust since it is well beyond saving. Looks like someone already welded in some replacement pipe on the header.

What is the best place to find copious amounts of this POR-15? Same as Rustoleum or is it Rustoleum on steroids?

1998 XJ - "El Jefe" 4.0L | Superlift | Dunlop | Cragar | Bushwacker | Hypertech | OR-Fab | Hi-Lift | Pilot | Smitybilt |
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post #7 of 13 Old 09-24-2010, 01:32 PM
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rustoleum on steroids is a good comparison - it's self etching paint. An automotive paint supply store or a aftermarket speed shop is a good place to start. Also can buy it online. It's not cheap but well worth the results

1995 XJ Cherokee Sport
4.5" Homebrew Lift, 4.0L HO I-6, AX-15, NP231, D30(Open)/C8.25(Locked)
33x12.5 Mickey Thompson Baja MTZ Tires, 309,000 mi and runnin' strong

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post #8 of 13 Old 09-24-2010, 01:36 PM Thread Starter
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alrighty then. I think I found my project for this weekend. Thanks Dukie.

1998 XJ - "El Jefe" 4.0L | Superlift | Dunlop | Cragar | Bushwacker | Hypertech | OR-Fab | Hi-Lift | Pilot | Smitybilt |
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post #9 of 13 Old 09-24-2010, 01:37 PM
Spencer43783
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Wire wheel off as much as you then paint it or put on rust convertor. That's essentially what POR15 is, just paint and rust convertor mixed. I don't know how rust convertor will react to heat but I'm about to find here soon cause my Jeep looks like yours. Bought it from northern Ohio...I thought we were bad in central Ohio with salt but man is that thing ate up. Mines also a 98

1998 Cherokee Sport 4.0L-AW4-NP231-C8.25--Black, trim removed and chopped. 31" Goodyear Wrangler Duratracs. 3" lift coming soon.
1984 Grand Wagoneer--Sold. I'll miss the old girl.
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post #10 of 13 Old 09-24-2010, 01:46 PM Thread Starter
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Yeah, living in North Texas, I have never had to deal with rust. That POR-15 stuff is pretty high dollar. Let me know how that works out for you, Spencer.

1998 XJ - "El Jefe" 4.0L | Superlift | Dunlop | Cragar | Bushwacker | Hypertech | OR-Fab | Hi-Lift | Pilot | Smitybilt |
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post #11 of 13 Old 09-24-2010, 02:52 PM
Spencer43783
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I didn't think that stuff was cheap. All rust convertor does is turn the top layer of rust into a 'metal' paintable surface with some kind of acid. Really you're better wire wheeling it off then painting it with the cheaper convertor stuff or just using paint if you really want to mask everything off. I'm getting some of that convertor tonight. I'll let ya know how it goes.

1998 Cherokee Sport 4.0L-AW4-NP231-C8.25--Black, trim removed and chopped. 31" Goodyear Wrangler Duratracs. 3" lift coming soon.
1984 Grand Wagoneer--Sold. I'll miss the old girl.
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post #12 of 13 Old 09-24-2010, 03:02 PM
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Double post

Last edited by Spencer43783; 09-24-2010 at 03:05 PM. Reason: double post-junk phone
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post #13 of 13 Old 09-24-2010, 03:37 PM Thread Starter
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Let me know what brand rust converter you use as well if it works.

1998 XJ - "El Jefe" 4.0L | Superlift | Dunlop | Cragar | Bushwacker | Hypertech | OR-Fab | Hi-Lift | Pilot | Smitybilt |
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