mechohaulic

On 2/26/2026 at 7:42 PM, mowerman said:

Excellent good for you. I didn’t get so lucky. With only one daughter picked the biggest loser in the United States 

don't think Your alone in that area. I just came from a meeting with my youngest ; we discussed the plans ($$$$$) for her marriage #2 to a not so bright man. marriage #1 failed leaving her with 3 children . she's 36yr old ??

another possibility with present situation would be  to leave top 3/4 pipe cap loose (or loosen when installed)till engine running to bleed any possible trapped air. kinda late now to change over to WP housing Not having tip turbine fan plumbing . updated housing did away with the  1/4 vent line.

On 2/26/2026 at 12:15 PM, mechohaulic said:

isn't the pipe coming off the housing a 3/4 dia ?? while heater hose pipe nipple a 5/8 ? I found a picture of a tip turbine Mack on line(can't figure this posting yet) it has a 3/4 +- hose going to water pump housing ; fans blocks clear picture. one version of tip turbine engines had water coolant used to lower air temp another went to air then to front mounted intercooler in front of radiator. point is : my guess is pipe on WP housing was for a tip turbine engine. this would also put pipe on right side of pump.

2 points !!ole man scored again 🤣.BMT keeps brain cells for us old people active . Thanks B M T . of course being this old have seen many changes /advancements in mechanical field. difficulty is remembering them.if I only figured picture down loads, found the picture of engine with water cooled intercooler showing the 3/4 piping.

to spend $$$millions on those fancy 4 -5 axle wreckers  and have them sit not profitable. they make the big bucks on calls ; when they are on one. take a set up like above having a 5th wheel ; unit not towing can be useful under trailers. fleets started using tractors with 5th wheel mounted wrecker set ups yrs ago. now they seem to be more elaborate 

2 hours ago, mowerman said:

oooooooohhh id rather be eating beef ribs or a sausage sandwich

me also BUT almost 75 with a "power plant" not functioning 100 % ; I have learned to adjust my diet. of course it depends on the weather !!(back on track ).. might have to move this to "what's cha cookin " to be on topic.

Passed  Your  RD west bound 84 yesterday . lookin good , 

1 hour ago, wayne86 said:

Yes it show b61t and 4 other numbers I reached out to the mack historical museum and they sent my build sheet and information on it. Also what is bmt crew not sure what that is? The caps were missing before I purchased the truck but already replaced most of the fuel lines.

bmt crew stands for Big Mack Truck members, as you will find out with your Mack build this forum is like a pit crew  which work as a team .  not doubting the model as B61 , the concave cab associated with B67 , a design made to  accommodate longer trailers still maintain tight turning radius 

28 minutes ago, Geoff Weeks said:

I think you have that backwards, it draws through the oil cooler to the center of the pump, centrifugal pumps always pump from center to outside. 

The block is on the pressure side of the system.  

edit: hum the post I was replying to seams to have been deleted?

a simpler version; if you check the engine picture from wayne86 and his '55 B, the water pump has a 1/4copper line off the housing pic 1 then pic2  shows the other end of line going to the thermo housing. this 1/4 line was known as the cavitation line; top housing would hold air. modern technology this line no longer needed. water pump draws from lower radiator through engine back to thermo housing and top radiator. heater copper pipe on lower radiator(suction side) pulls coolant from heater core while other copper goes to heater .

isn't the pipe coming off the housing a 3/4 dia ?? while heater hose pipe nipple a 5/8 ? I found a picture of a tip turbine Mack on line(can't figure this posting yet) it has a 3/4 +- hose going to water pump housing ; fans blocks clear picture. one version of tip turbine engines had water coolant used to lower air temp another went to air then to front mounted intercooler in front of radiator. point is : my guess is pipe on WP housing was for a tip turbine engine. this would also put pipe on right side of pump.

2 hours ago, Freightrain said:

That is kinda why I am puzzled.

Both my 237 and this 300 have a shut off valve in the rear water manifold where a hose connects.  But both have different fittings at the pump end.

I was looking at engine and trying to determine water flow directions.  Water should come from bottom of block and up per say and out at thermostat at front of engine.  So the water at rear manifold is "hot" and returning to radiator.  Thus it is going TO the heater core.  Then the line at the pump is the heater "return" and needs to be on the suction side of pump.

rear shutoff valves are installed since the b's didn't have best air conditioners back in the day. without the shut offs. coolant would still circulate in cab. is it possible reason for two different fittings in front were due to one had brass pipe return other rubber hose ??

defiantly good to have extra parts, either for trading material or might need for the next B model you get, can't have just one !🤣. hopefully the BMT crew won't be kept in suspense waiting for verification of vin / model. it's for sure a B; the concave back usually is a B67. door plate will tell if it's there. or frame rail. picture looks to have fuel tank missing cap. start up may require bit of system cleaning. 

19 minutes ago, mechohaulic said:

possibly  going a little off topic (Yukon Jack's fault) found a video today of Clint Eastwood's movie premiere showing of his new film :: ??? and encounter with a Veteran. find it/listen to it .unlike those politicians who pat themselves on the back; there are those;;  Mr. Eastwood and others that help those with out recognition!!  find it ;; no way you will have a dry eye, heck with the politicians !!THANK YOU to all that have and are servicing to keep us free!!!

it was the 2008 premiere showing of movie :: grand Torino; on youtube ; good to know there are those still today that are caring humans !!

concave back cab (B67??) ; large air tank?? _===air starter ??? ) have vin tag on door ?? or chassis rail for varication?

another example of "a diamond in the ruff" LOL it's a part ;even if a small part of history. twin stick  :: guess it would be a duplex (10 speed ). 

possibly  going a little off topic (Yukon Jack's fault) found a video today of Clint Eastwood's movie premiere showing of his new film :: ??? and encounter with a Veteran. find it/listen to it .unlike those politicians who pat themselves on the back; there are those;;  Mr. Eastwood and others that help those with out recognition!!  find it ;; no way you will have a dry eye, heck with the politicians !!THANK YOU to all that have and are servicing to keep us free!!!

25 minutes ago, Joey Mack said:

Why is CBS news telling a story about how the U.S. Womens Hockey team didnt get the same invite to the whitehouse.  The team said they were invited but had logistical issues. There is currently a standing invite by Mr. Trump. Its a matter of getting them there.. Its odd. Both teams are proud of the other and have not shown sadness about it, at least in the few interviews i have seen in the past few days.  Mr. Trump even gave respect to the womens team last night at the S.O.T.U. address.  Im missing something here.   

women's hockey only few sports I watch. far as Olympics ; only interest was women's curling competition ! . may be boring to some. yet how can corruption interfere?? like building an engine !!! either it's right or You F= - --Ked up. the determination on the eyes of the teams, send a "puck" in right position AT right speed same as install a piston correctly?? 

time allows, send some pictures of unit interior with vin numbers off door plate . '55 B ;; days of working trucks for sure.!!

seems it is as you say :: lines cut for scrap copper. apparently who ever had enough "brains" NOT to cut coolant copper lines for profit!!  cut the low air / along with every other copper line,.keep the faith YOU can rebuild  a part of history.

nipple installed in the water pump will be the heater; the pipe tube in reman water pump MAY be for a newer style engine having a tip turbine fan inter cooler ??? every thing seems to change to this "updated" crap. picked up a new tower control for 5200 John Deere I'm working on ($520.oo) had newer safety  plate >  45 degrees off original>WTF .. personally I would either return for exact or make short hose section with plug and  run it.