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Discussion Starter · #1 ·
Sorry, but looking for thoughts.

95 F350 w/ 460 EFI, Auto and 136,000 miles.

Head gasket has developed a slight leak on cylinders 2,3 and 4 with 140 psi.
1,5,6,7 and 8 at 155 psi.

Slight white smoke from the exhaust. Yes, some water in the oil. Will piss some water out above #3 after warmed up (very tiny leak, leaving plug/exhaust wet and a puddle). Slight miss in #4.

My 1st reaction is to replace the head gaskets.
Don't think I can get the gaskets changed with the engine in the truck.
Not looking forward to pulling this monster out.

Looking for alternatives and found this product over the weekend. Looks like it has potential.

http://www.rxauto.com/index.htm

Watch the video.

The price is about the same as the cost of the gaskets I will need to pull the heads and replace the gaskets.
Price refund guarantee is a plus.

Any experience or thoughts?

Thanks
 

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Don't blame you for not wanting to pull it. If you got the marshmellow oil and white smoke it's probably a pretty fair gap in there....not sure how well that stuff would work to be honest. I'd be afraid it would clog up the rad tubes as well? IDK
I'd be tempted to bite the bullet and fix the real issue - and check the heads for warped while I was at it...much better peice of mind too. Especially for a daily driver.
 

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Discussion Starter · #3 ·
Bad69Cat and all,

Yes, I know pulling the engine and replacing the gaskets is the "right" thing to do. I have done my share of rebuilds and repairs.

50 Chevy PU 6-cyl head pulled and replaced.
My original 70 351W rebuild.
Switched out engines and trannies in 80/81 Mustangs (4-cyl to 6-cyl and vice versa - including k-frames)
Swapped engines in a station wagon for a friend.
84 jeep 6-cyl head pulled, planed and replaced.
85 Escort 4-cyl blown engine pulled and replaced with running used one (good car/bad engine, bad car/good engine)
95 Mitsubishi Elclipse 4-cyl rebuild.
85 Nissan 300 zx v6 rebuild - upper end first, then complete.
69 Vert 351W rebuild.
71 F250 PU 360 rebuild.

I took the front off of this 460 2 years ago and replaced the timing chain while I was replacing the gaskets on the water pump/timing cover. Has been a really good engine up until now.

Thinking about "cheating" this time and trying this stuff out.
If it works, I'm good to go.
If it doesn't work, I get my money back and tear it down.

You can say I am being lazy, but I have a lot of other things to take care of, now that cold weather is upon me.
 

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Guess it's worth a shot - let us know if you have to claim your $ back? I'm curious if it could continue to hold up with expanion/contraction etc....may want to google around and see if anybody really has had good luck with it before commiting.
Xing my fingers for ya!
 

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Discussion Starter · #6 ·
Well, I did google around and actually found 2 other products for aLOT less.

Bars Leak Liquid Copper Block Sealer that sells for around $7.99 / bottle.
K&W Head Gasket Sealer that sells for around $15.99 / bottle.
All 3 products had good and bad reviews.
Seems like a lot of people have had great success with all 3 of them.

At under $20 and with local availabilty, I'm going to give Bars Leak or K&W a try.

Will follow up after I use it!
 

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Change the gaskets. The head has probably sustained some warpage and needs to be checked.
If it does have warpage, you'll never make it work with a stop leak product.
If you run the stop leak while water is mixing with the oil, it's possible you'll dork up your bearings.
You may get your money back, but then you'll have bearings and head gaskets to do.

BTW, you can change the gaskets with the engine in the truck.

Stop leak products will work for a bad gasket that's venting combustion gases, and for cold induced fractures, but for a gasket leak that is between water and oil, not so great.
I have seen bars leak fix a 460 head with a cold weather crack in the rear surface.
 

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^^Good point Andy - never thought abut the bearings getting filled in too! Stick to your first instict, and find a buddy with a heater you can borrow...I hove one of those little torpedo heaters for cases where need to work outside in crappy weather. best $35 I ever spent on a garage sale! Good luck.
 
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