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6.0 cylinder head cracking.

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6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van

6.0 cylinder head cracking.

  #1  
Old 12-09-2018, 09:45 PM
B W
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6.0 cylinder head cracking.

I have a 2003 F250 with a 6.0 engine , it's completely stock with over 250,000 miles on it. I took it in to get an oil cooler replacement, it turned into them saying the heads were cracked and they're wanting the replacement Jasper engine ones from another vehicle, a newer truck. I was told that the 03 and 04 are known for cracking and replacing with a later model year will fix the problem if they've been resurfaced. Is there any truth what I've Been Told?
 
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Old 12-09-2018, 09:55 PM
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Why are they saying the heads are cracked? Was the truck pushing coolant?
 
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Old 12-09-2018, 09:59 PM
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The hoses were hard and the heater was not working. They said the head gasket was forcing the coolant to almost going the opposite direction,it was blocking coolant flow.

they also said at the 03 and 04 heads were prone to cracking and I'll have to get newer model and anyway.
 
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Old 12-09-2018, 10:01 PM
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One mechanic said they put a test cap with a pressure gauge on the cooling system and it was maxing out at 17 PSI.
 
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Old 12-09-2018, 10:06 PM
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I should just said, are my head's really junk? Are the early model heads known to be a problem on the 6.0? Is it really worth the extra $3,000 for what they're doing?
 
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Old 12-09-2018, 10:12 PM
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I just got to say everything I have read in this thread is incorrect and the method the shop is using is wrong. The only way to check for cracked heads is to magnaflux them. Also don't replace the heads with factory reman heads from Jasper. Get brand new promaxx heads for 895.00 each and move on. The shop sounds like they are trying to funnel fear into you for a better payday.
 
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Old 12-09-2018, 10:15 PM
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The Jasper heads have an unlimited mileage warranty. What do the ones you're talking about have? They use Jasper heads on everything and won't use no other brands. They listed a number of other items that has to be done for the engine warranty.
 
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Old 12-09-2018, 10:30 PM
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Originally Posted by B W View Post
The Jasper heads have an unlimited mileage warranty. What do the ones you're talking about have? They use Jasper heads on everything and won't use no other brands. They listed a number of other items that has to be done for the engine warranty.

Jasper heads have a 1 year unlimited warranty and no labor on heads is allowed and shipping is on the buyer. The promax heads are 3 month unlimited, however they are very problem free and have updated castings to prevent future cracks.
 
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Old 12-09-2018, 10:37 PM
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I was told two years.
 
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Old 12-09-2018, 10:59 PM
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If the shop told you that then they don't know the Jasper product. We stopped using jasper over 10 years ago because of the warranty denial rate. See attached Jasper warranty. Its 1 year and the labor is 100% on you and so is the shipping costs. Jasper knows this and it's also why Jasper has a very low warranty claim rate. There is also this which keeps their warranty rate low "submit a claim with the alleged defective parts shipped prepaid to JASPER for its review and sole determination". If you want some factory heads get them from ford. At least you get a 2/24k warranty.
 
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Old 12-10-2018, 11:20 AM
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Don't bother wirh Jasper or that shop period....

They obviously don't know the engine well if they even suggested Jasper heads.
 
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Old 12-10-2018, 11:38 AM
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The heads are not necessarily cracked. Sounds like you have a blown head gasket.
 
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Old 12-11-2018, 10:08 AM
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Originally Posted by MisterCMK View Post
The heads are not necessarily cracked. Sounds like you have a blown head gasket.
It's like when your car breaks down, you tow it to the dealer, and while it's in for repairs, they suddenly have a "loaner" available that looks like yours but is newer.

You end up liking the car, buying it, then they fix your car at cost and make a ton of money twice, on the new and old car.

In this case, they're just trying to upsell you on a headgasket job maximize their profit by using Jasper heads.
 
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Old 12-13-2018, 02:01 AM
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IMO it sounds more like a water pump impeller failure. If there is no fuel in the coolant itís is definitely not a cylinder head or gasket failure.
 
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Old 12-13-2018, 09:14 AM
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Coolant pressure will max out on all of them when heating up, after it's fully warmed up if you release the pressure and it maxes out again that's an indication of a blown head gasket.

Fuel in the coolant is the indication of a cracked head.

Blend door problems are common which can cause no heat or no cold situations depending on which direction the door is stuck at.

Heater cores work in both directions, so coolant flowing backwards doesn't turn the heat off. There is also maybe a vacuum operated heater control valve under the hood which can shut off coolant to the heater core, I don't know if all years got them. A coolant problem that turns the heat off is either the coolant level is so low that it drops below the level of where the heater core is, or the valve is closed blocking flow.
 

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