Things always work out for an honest man. You’ll be fine.
Build Powda Blue 74 Build - Tilda Bogue Service Station
- Thread starter wngrog
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Seems like the best solution, Nolan. A 20-year-old lead footed hotrodder shouldn't be allowed anywhere near this rig...And if he can’t trust it anymore, I’ll come write a check this week
It looks like the fan is chewed up on the edges - and a 60 series fan is real tight fit In the smaller shroud. Plus the fan flexes at high rpms- just throwing out observations here maybe not getting proper air flow....(distance from radiator)…not enough room to pull air just a WAG
the 74 was engineered for the 1.5 wasn’t it? I had to drill new radiator holes @3/4” out for the radiator to have proper fan clearance for the 2f with fan clutch. I think 1.5” is the minimum fan/rad space. I know you have done several of these so ur aware but I see the old factory located radiator holes were used here. I’ve been told by others more knowledgeable..the fan needs to be 1/2 in the shroud and 1/2 out to allow fan to function properly
the 74 was engineered for the 1.5 wasn’t it? I had to drill new radiator holes @3/4” out for the radiator to have proper fan clearance for the 2f with fan clutch. I think 1.5” is the minimum fan/rad space. I know you have done several of these so ur aware but I see the old factory located radiator holes were used here. I’ve been told by others more knowledgeable..the fan needs to be 1/2 in the shroud and 1/2 out to allow fan to function properly
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But they drove it without the hose, and coolant (?), asked if it “would make it?.” “there is only one way to find out”
Did the original motor build include rings/pistons, cam shaft/valves? If so, how was the motor broke in? Hopefully not by the 8+hrs @ 3000+rpm
.
- Thread starter
- #406
Those are cuts. This is the same setup I’ve done on 6-7 40s. In the truck there is plenty of room. Cuts are so so could use the early smaller diameter shroud. Bigger fan.
He has a Dakota with a temperature alarm. It for sure overheated last summer twice before I fixed it.
Dakota and Sniper temps are consistent. It runs nice and cool
- Thread starter
- #407
But they drove it without the hose, and coolant (?), asked if it “would make it?.” “We’ll see.”
Did the original motor build include rings/pistons, cam shaft/valves? If so, how was the motor broke in? Hopefully not by the 2.5hrs @ 3200rpm
I did a 20 minute cam break in then drive it normally for about 100 miles before the customer took it.
Yes. Full rebuilt motor.
reading the plot to this 40 reminded me of a guy in HS who came from a wealthy family - got a competition ski boat for his 15th birthday, which he blew the engine in..then daddy fixed that and not long after he sunk it with a load of bikini teens when he forgot to put the drain plug back in.
we all had 4x4s Jeeps/Broncos so his dad built him the baddest early bronco probably in the whole state - i remember they put in a 351W motor that was $7500..now this was back in the mid 80s! he blew that one, although it probably always had overheating issues. then dad bought a new Nissan X-terra which quickly got rolled at 2am while doing donuts in front of the HS.... they came and found me to flip it back over with my old cj7 ....lost track of him after HS.. he inherited a ton of money from his grandparents moved to ski villa around Jackson Hole WY
yeah some people just kill everything they touch
I won't even let the wife drive the cruisers, let alone the kids.
It’s hard to tell….
Realize the popped hose started the path of destruction.
I think you have all those possibilities:
Warped block
Bad head
Head Bolts loosened
Question…sorry if this is dumb.
was this an MLS head gasket? Were both the head/block machined correctly for MLS and smooth?
Realize the popped hose started the path of destruction.
I think you have all those possibilities:
Warped block
Bad head
Head Bolts loosened
Question…sorry if this is dumb.
was this an MLS head gasket? Were both the head/block machined correctly for MLS and smooth?
Maybe lead foot kid that couldn’t tell it was out of gas previously and probably let it rain on the the Sniper module also watched this:
- Thread starter
- #413
OEM head gasket.
I don’t build em but I did reinstall the current head that is on it.
I’m picking up a new motor for another truck next week from this same builder.
Plan is to take it apart a piece at a time together and see where the problem is.
The biggest worry I have is prolonged use with the coolant in the oil damaging the bottom end.
Agreed this would be my main concern as well. It doesn't take long to eat up the main bearings.
- Thread starter
- #416
Update. Rory walked me through breaking down this motor. Full CSI step by step.
Luckily the bottom end is good. All the bearings are in great shape.
Looks like the issue was when it overheated so bad it warped the top of the block.
Rory has a big straight edge and you can see light toward the back 1/2 of the block.
The top off he head gasket was doing its job as was the new head I put in it this summer.
The block was warped and it was letting water in on the bottom of the head gasket.
Good news is all the internals are good.
Bad news is we had to tear it all apart to get the block decked.
I won’t be going home with it dammit
Luckily the bottom end is good. All the bearings are in great shape.
Looks like the issue was when it overheated so bad it warped the top of the block.
Rory has a big straight edge and you can see light toward the back 1/2 of the block.
The top off he head gasket was doing its job as was the new head I put in it this summer.
The block was warped and it was letting water in on the bottom of the head gasket.
Good news is all the internals are good.
Bad news is we had to tear it all apart to get the block decked.
I won’t be going home with it dammit
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Good to hear! But man, where does all that warped metal go, there’s so much meat in these blocks. Are the cylinder bores still aligned with each other?
- Thread starter
- #418
About a month later and Rory was kind enough to put this one back together and even deliver it.
I moved it into the shop last night and started putting it back together slowly with all new gaskets and such
I moved it into the shop last night and started putting it back together slowly with all new gaskets and such
Wait ‘til after spring break to give it back haha
- Thread starter
- #420