Dave’s Engines
Region: US
Saturday 28 September 2024 18:49:06 GMT
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No One :
I'm wondering if it was due to rapid cooling when/if the engine fire was put out by first responders.
2024-09-28 18:56:50
411
Deke :
Cold water from the fire hose hit it and cracked it. That's my guess
2024-09-28 19:48:00
44
booboo15757 :
It crack the intake
2024-11-01 07:13:44
0
Mark Mck898 :
How long been sitting outside is it possible to sit through winter and froze?
2024-09-28 23:05:49
3
Otags :
the cast was not properly done from the manufacturer
2024-10-06 20:39:28
1
jarhead501 :
It was hit with water when it was hot. I have that T-shirt
2024-10-03 23:48:11
1
Farm-shit :
Heated up with fire then got hit with the water hose to put it out
2024-09-28 21:32:43
1
Luis Raul Manriquez :
drastic change of temperature!
2024-09-28 19:00:49
3
Russell :
Hot metal plus cold water = crack
2024-11-02 21:23:58
0
joslinbcp :
I have read that you cannot machine the 5th gen blocks due to the material it is made of. Is this true?
2024-09-28 19:36:54
1
John Spears :
Have the intake plenum milled off and put a banks on it or a custom intake
2024-10-06 16:24:47
1
. :
water by firefighters after being really hot
2024-09-28 21:55:03
1
safety specialist :
rapid cooling
2024-09-29 00:46:44
2
lonsterling3 :
Maybe not cooling right
2024-09-28 22:24:05
1
BADco :
Could’ve been when they sprayed it down. It was so hot. It cooled too fast and cracked.
2024-09-28 19:00:38
3
Tap to add name :
I bought a burned 6.7 tore it down had same problem. Crack in head. I used block just cleaned up everything. Note the squirter are plastic and melt.
2024-09-28 19:37:07
2
squilliam.the1 :
Or did it backfire and explode then fire
2024-09-29 01:28:54
2
adamdavis7055 :
so that amount of heat didn't affect the strength of the block since it's composite.?
2024-10-01 02:15:03
1
kingadam1984 :
Well the aluminum was starting to melt which takes 1200°. Then the fire department comes with 60° water well there you got it rapid cooling pop crack
2024-09-28 19:22:36
27
Mark Chase :
I’m surprised that heater grid bolt and nut stayed on strong through all that heat ! But they fall off and destroy your engine any other time. 🥺
2024-09-28 19:38:35
6
Jim Miller :
yeap fire department cold water on hot cast
2024-09-29 00:42:44
7
lblachford :
It’s a heat stress crack from rapid cooling
2024-09-29 07:33:46
1
rickybobby1234 :
very common on cummins heads to Crack from a fire. The head is still usable in a high performance setup. mill the shelf off and put an intake runner on it.
2024-10-05 15:59:27
3
Bill :
I have worked on Cummings that have come out of big rigs that I’ve been on fire and most cracks. I’ve seen like that is from when the fires going and the fire department pours water on them the metal
2024-09-29 01:02:22
2
Full Throttle Performance :
Have piles of heads like it from fires. Head not junk it’s good for a side draft set up.
2024-09-29 23:19:07
1
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