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I have their pushrods in my 440.
Motor home 440
- Thread starter Joe Jacalone
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Another thing about that MH 440....the water pump looks like it empties out on the passenger side. These pumps have a huge sewer sized opening inside the casting for water flow compared to the car pumps which have a little pencil sized hole. So, if you can live with having difficulty getting a timing light on the marks because the WP outlet is blocking it then great cooling is the payoff. I have one on mine.
Water Pump Housings from www.440 Source.com
Water Pump Housings from www.440 Source.com
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Still another thing about the MH 440's is that it very likely has a dual row timing chain, and heavy six pack connecting rods. It may even have a forged steel crank. All keepers unless you are going stock rebuild then swap out the heavy rods for lighter weight LY rods.
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I have the same casting number 4006630 except mine is 440-1, same pad stamp of 8T 440 E. Mine came out of a motorhome as well. Will be a nice addition to your Belvedere.
Joe Jacalone
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Thanks! Good to hear yours worked well for you. I was a little hesitant because it was out of a motorhome, but it is only supposed to have just over 10k miles on it.
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There's nothing wrong with MH 440's. With the right intake, carb, pistons and machining they wake right up.
Roger63
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I have heard several arguments that the later 440 blocks are actually better. A higher nickel content makes them harder and the webbing around mains is thicker.
BeepBeepRR
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Hughes sells a whiplash cam for the RV engines that’s supposed to help. The Summit K6401 is a cheaper choice though and a decent cam.
mgoblue9798
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Biggest differences that are found on motorhome 440 engines are a steel crank and six pack rods being used. Heads can also be different with more water passages. There is even a 452 head for RV's that have the small peanut type plug.
The engines built with the raised water pump are 361/413 engines and are very different up top above the short block.
These are what most refer to as "industrial" engines, and even they came with 3 different packages depending on the applicaton.
The engines built with the raised water pump are 361/413 engines and are very different up top above the short block.
These are what most refer to as "industrial" engines, and even they came with 3 different packages depending on the applicaton.
The whiplash cam is tricky to tune since the idle is pretty rough.
The Summit cam has a smooth idle but makes good power around 2,500 rpm and has great low end torque.
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That 440 source article straightens out the myths on 440 blocks.
Roger63
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You are correct, mine liked 15deg initial timing with the vacum adv unplugged.
BeepBeepRR
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My RV 440 was a 75 block had 452 heads with a cast crank and LY rods. Not all RV engines had steel cranks. Pictures below show the extra coolant ports.
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The 440 source article has good info on casting and webs etc but unfortunately doesn't touch on this subject whatsoever
BeepBeepRR
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This is a normal 440 Block.
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Doesn't touch on what subject?
Some " Industrial/cold weather-truck" blocks 440-426-413 look like this..
The guy ended up having a non industrial motor, hopefully it's useful.
Pretty much wraps up the thread.
Joe Jacalone
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Wow, that is quite abit of extra cooling ports! Your engine looks great. I am on the fence about painting it blue or orange.
Joe Jacalone
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The guy I got mine from had a video of it cranking over building 40+ psi of oil pressure. My intention is to change the pan, pull the valve covers, change the intake and carb. add headers, clean and paint it, and see if it will run ok for now.
I used a 76 RV 440 in my coronet. 38k on it.
After getting it home and on the stand I cleaned it up then took the top end off and pan.
Bores looked great, pulled a rod and main cap , bearings looked fine so put them back.
New oil pickup and b body pan along with new rear main seal.
New cam and dbl row chain.
On the 452 heads. Once I pulled the springs I ckd
The guides for play. All felt good. So lap the valves and install new seals.
Put it all back together.
Fast forward 2 years, it runs great , good oil pressure.
They may be low compression but I can buy fuel anyplace
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