Joey Mack
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Everything posted by Joey Mack
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either oil pump will do good. I have used both.. however, the last PAI oil pump I used ran about 7PSI less than Mack's. This is based on comparing several engine builds.. 70+ PSI on a fresh build with a Mack pump is common, 60+ PSI is also good, but .... on the low side the PAI pump showed around 32PSI at low idle. still not bad... JoeH's CAC tester is decent and easy to make.. just be sure to tighten the clamps really tight. The caps will shoot out if not tight..
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Yes. However there is a spec for re- use..
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I wish you the Best !! Jojo keep us posted..
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Well Straydog, I appreciate the fact that you want to get it re-built.. Please make sure the shop knows how to do Mack engines. especially setting the liners to the correct height. and ask if they have a counter bore cutter in the case the shelves are pitted out to the edge.
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I just drink Busch Light because its just OK and cheap. I do like PBR at times, and I really like yuengling, just to 'Cheap' to pay for it.
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you dont have to remove the CAC. just spray with soapy water.. there usually crack on the right side near the top and along the weld on the tank.. Just like Joeh said.
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Yes it is, but they have yet to have a ''Switch hitter'' advertise for this brew,,,, until then, I'm good..
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No Bud Light in this house... just sayin'
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its been below 20 degrees around here this week, and will be for the net few days.. My truck doesnt make heat very good so I thought I might recycle some boxes and make a shield to help raise the temp. in Old Blue.. It folds down for warmer days..
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yes,, especially in re-man heads.. I think they werent fully drilled through and you can punch out the slug if you put the stud in too far.. I think i remember that 🤔
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yes, the lower exhaust stud holes are open. they go into the pushrod bore.. with this being said, if you re-seal/replace them be sure to avoid running those studs too deep. you WILL hit the pushrod.. the stud end in the head is about 3/4''.. if you decide to pull the heads, before you do, get a dozen M16 x 75mm long bolts, and large washers the same size as a half dollar. you will use these to hold the liners down. this way when you are rotating the crank to inspect the liners, you wont risk the chance of moving a liner. It's rare, but possible.. Jojo
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just look at cross hatching.. if there is some left, just hone them and GO!.. the new rings will make up the difference. it will run fine.. you may have to trim the carbon ridge at the top of the liner, but that is common for liner re-use.. before you pull the heads, come back for more advice..
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with a bore mic.. pull the wrist pins and inspect the bushings, if they are good, just hone the liners and re-ring your pistons and put them back in.. all of what he (fjh) said about cost and usage is real time thinking.. he's right.. jojo
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straydog... did you forget to post something?? jojo
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Mack Cabover
Joey Mack replied to Macktruckman's topic in Antique and Classic Mack Trucks General Discussion
you are very kind.. To me, this world of trucks and truck people is a Family.. Thank you sir.. Jojo -
Mack Cabover
Joey Mack replied to Macktruckman's topic in Antique and Classic Mack Trucks General Discussion
these guys are the best.. jojo -
I understand...
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The dealership, is going to try to sell a ''Basic'' to you.. I wouldnt expect them to have a knowledgeable re-builder in house. also, if its a Mack dealer, they are going to tell you that the re-man center doesnt have any E-7's and they want yours to re-build, and it will be 6 months till it's done. I dont know what is available to you as far as skilled shops, so forgive me if i'm out to lunch..
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have you considered replacing the valve seals? you can do it with the heads on the engine..
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It sounds like you did your homework :).
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Yeah, I'm leaning towards FJH's side and checking blow by is good to do. You didn't mention blue smoke, or leaks, or even how much oil you are adding and the time frame..
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Losing oil pressure
Joey Mack replied to mackrmodel686st's topic in Modern Mack Truck General Discussion
I have an oil pressure gauge on a 20' hose that I put in on the top of the centrimax filter housing. i have a 't' fitting on it so I can put the line and pressure sensor back in line, then I can hang it in the cab when I test drive.. -
Losing oil pressure
Joey Mack replied to mackrmodel686st's topic in Modern Mack Truck General Discussion
boost loss is not related, I just put that in there because Im seeing 2 issues.. -
Losing oil pressure
Joey Mack replied to mackrmodel686st's topic in Modern Mack Truck General Discussion
Black smoke can be a boost leak.. can you pressure test the charge air cooler and intake manifold for leaks? I would do it just because.. -
Losing oil pressure
Joey Mack replied to mackrmodel686st's topic in Modern Mack Truck General Discussion
so in years past, we would roll rods and mains in and take the oil pump apart and look for scaring grooves inside ,and inspect the relief piston for scratches, and the spring. another thing to look at is the plugs on the end of the rocker shafts. they can loosen or even pop out. I say this, not knowing how good it runs and what color the exhaust is.. If the engine needs a re-build, (rings) then at least you will have the new rods and mains.. It has been a good way to get oil pressure back up. In most of the repair we did, the updated high pressure oil pump was installed.. Jojo
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