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Diesel in coolant bottle

1K views 3 replies 3 participants last post by  79jasper 
#1 ·
Here we go
Did heads and studs. Before the job had slight. miss when cold.
Had all injectors checked and they told me 3 injectors were bad so I purchased them from the shop
Had heads pressure checked and confirmed flat.
Installed ford head gaskets and arp studs
After about 3 days of running hard f450 dump
I have diesel in the coolant maybe a 1/2 quart or less .
I flushed the system with vc9
Removed injectors and caped the injector holes with vacuum caps
Pressurised the coolant system to 20lbs
For 14 hours and none of the cups had coolant in them. At this point I suspected
Someone had put the diesel in my coolant
(Had a bad disagreement with the ford dealer who sold me bad stand pipes and tried to them sell me a fuel pump)
Put it back together and flushed the coolant again
Drove it another 5 days and the coolant slowly rising and diesel fuel was on top
So I got the engine good and hot and made addapter to put air pressure directly into the head fuel inlet. And oressureized to 100 psi (left cap on resivor) and no pressure built up in the coolant bottle
At this point in stuck I don't know where the diesel is coming from I would have thought
One of the test would have showed a leak
I also looked for bubbles when I pressured the coolant system .
I decided to pressurize the fuel line to each head because I thought the head might only leak when warm/hot
Any ideas would be much appreciated
 
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#4 ·
Following a thread op never came back to 5 years ago?

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