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Old 11-03-2018, 11:48 AM   #1
Gunfighter97
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Default Sv 304 Cooling System Cleaning

I will be pulling the water pump out of my 1965 truck today (among other things), are there any things specific to IH to measure/look for play in other than a generic water pump inspection?(ie. Check bearing play/wiggle and check for extreme corosion) I doubt the impeler itself will have issues unless its really coroded. Pics to come...
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Coming to you from behind enemy lines, in an unmarked barn, somewhere in The Communist West
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1965 IH D11004x4 "Sherman"
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1973 Fiat 850 Spider "il Cannoli"
Half of a dead 1958 Apache "Mad Dura-Max(to be)"

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Last edited by Gunfighter97; 11-10-2018 at 06:27 PM.. Reason: Edited title since this thread evolved well beyond the scope of the original intent
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Old 11-03-2018, 12:16 PM   #2
1975IH200
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Default Re: Sv 304 Water Pump Inspection How To

You could check the IH Service Manual for this information.


Here is a sample of what is in the IH Service Manual.

....see attachment....
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File Type: pdf Water Pump partial extract.pdf (181.0 KB, 19 views)
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Last edited by 1975IH200; 11-04-2018 at 04:16 AM..
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Old 11-03-2018, 12:31 PM   #3
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Default Re: Sv 304 Water Pump Inspection How To

Haha yea i just went through most of that b4 I got my hands all greasy. Was just looking for additional info. It would also probably help if i got a binder for it all lol. (In case youre wondering why im here with greasy fingers, it cleans off my phone better than paper) one thing I wish I had looked for was a way to let air in to get more out the bottom hose. Probs not helping my one block drain is seized and the other covered over in jb weld i cant get the heater coer to drain
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Coming to you from behind enemy lines, in an unmarked barn, somewhere in The Communist West
(currently planning my escape)

1965 IH D11004x4 "Sherman"
1946 Dodge Job Rated half ton "Rusty"
1973 Fiat 850 Spider "il Cannoli"
Half of a dead 1958 Apache "Mad Dura-Max(to be)"

MEEEEEEEEEEERRY CHRISTMAAAS!!!!
RIP wallets everywhere.

Luke 2:11
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Old 11-03-2018, 12:50 PM   #4
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Default Re: Sv 304 Water Pump Inspection How To

There we go. I used my (left) brain and boy howdy is it draining now!
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Coming to you from behind enemy lines, in an unmarked barn, somewhere in The Communist West
(currently planning my escape)

1965 IH D11004x4 "Sherman"
1946 Dodge Job Rated half ton "Rusty"
1973 Fiat 850 Spider "il Cannoli"
Half of a dead 1958 Apache "Mad Dura-Max(to be)"

MEEEEEEEEEEERRY CHRISTMAAAS!!!!
RIP wallets everywhere.

Luke 2:11
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Old 11-03-2018, 01:51 PM   #5
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Default Re: Sv 304 Water Pump Inspection How To

The thing to check on water pump is the volute clearance. It should be .015.
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Old 11-05-2018, 08:41 AM   #6
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Default Re: Sv 304 Water Pump Inspection How To

So, I've found my worst fear....

The leak in my original rad was steadily getting worse as I aproached this point, so my question now is, and as usual with me, this will either be a terrible idea or work brilliantly: can I continue my swap and put a filtration system on my new rad temporarily while I run some chemical flush? Or am I asking for more problems? The heater system will be capped off with a loop for now, it will be getting new internals.
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File Type: jpg 20181104_122012.jpg (79.0 KB, 101 views)
File Type: jpg 20181104_122102.jpg (74.8 KB, 96 views)
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Coming to you from behind enemy lines, in an unmarked barn, somewhere in The Communist West
(currently planning my escape)

1965 IH D11004x4 "Sherman"
1946 Dodge Job Rated half ton "Rusty"
1973 Fiat 850 Spider "il Cannoli"
Half of a dead 1958 Apache "Mad Dura-Max(to be)"

MEEEEEEEEEEERRY CHRISTMAAAS!!!!
RIP wallets everywhere.

Luke 2:11
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Old 11-05-2018, 07:37 PM   #7
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Default Re: Sv 304 Water Pump Inspection How To

Why can't you do your flushing with the old rad in place? So what if it leaks like a sieve?
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Old 11-05-2018, 09:17 PM   #8
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Default Re: Sv 304 Water Pump Inspection How To

I was hoping to avoid having to put everything I just removed back. Oh well, it seems to be the only option. To be honest, I'm slightly worried, given condition of the engine side, corosion may be all that is holding my old rad together and may disintegrate with the flush agent. But then again, I dont care too much about it. Also sorry if I dont seem "all there" I've been jumping between this and other things, and my brain was stolen and replaced with scrambled eggs somewhere inbetween. I guess one thing I'm trying to figure out is that I know clr will kill the rust, but Ive heard the comiefornia flush isnt all that powerfull vs rust. IDK ima sleep now and hopefully it will make sence by tomorrow
Edit: sory half a thought again... My other idea was to cap off the lowest points and fill the system with clr for a day or two then rinse it out.
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Coming to you from behind enemy lines, in an unmarked barn, somewhere in The Communist West
(currently planning my escape)

1965 IH D11004x4 "Sherman"
1946 Dodge Job Rated half ton "Rusty"
1973 Fiat 850 Spider "il Cannoli"
Half of a dead 1958 Apache "Mad Dura-Max(to be)"

MEEEEEEEEEEERRY CHRISTMAAAS!!!!
RIP wallets everywhere.

Luke 2:11

Last edited by Gunfighter97; 11-05-2018 at 09:26 PM..
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Old 11-06-2018, 09:06 AM   #9
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Default Re: Sv 304 Water Pump Inspection How To

Dude, I'm telling you CLR will help this mess out. You scrapped the idea earlier citing its incompatibility with aluminum (and it is).
But you don't have any aluminum in that engine. THe radiator is still the brass one right? Only the pistons in that lump are made of aluminum. Pretty sure you've got bigger problems if the CLR will get them wet.
Dump a jar of that stuff in and add de-ionized water from the grocery store to top it off and drive it around for a few days. Then pull the lower hose and drain it all out, and do it again. Total cost is less than $20. These motors are plenty thick and have to be sitting at the bottom of a lake to be "too rusty to save."
Then pull all of the block plugs and replace them with brass ones, replace all of your hoses when you do the radiator, and you'll be good to go.
This is coming from someone who strives to stretch a buck. There are more costly options out there, this is just my 2 cents. Let us know how it goes.
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Old 11-06-2018, 09:49 AM   #10
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Default Re: Sv 304 Water Pump Inspection How To

You might want to try something IHPA stocks, it is easy to use and will give good results. Go to the Parts section and open up the Lubricants. There is a product called RMI-25 Cooling System Treatment. It will clean out the rust and corrosion, but may take two treatments if yours is particularly gross. I do recommend that you change out the soft plugs with copper/brass ones because the originals were steel and are subject to corrosion to the point of leaking. Adding a bottle of RMI-25 every 15,000 miles/300 hours will keep the system clean and prevent more corrosion. There is no danger in overtreating with it. It also contains a water pump lubricant and a black light leak detector which helps locate where leaks may be coming from.
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Old 11-06-2018, 01:53 PM   #11
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Default Re: Sv 304 Water Pump Inspection How To

Run your chemical of choice first, old radiator. Then drain everything and pull the water pump pipes. Their condition should give you a clue how bad it really is. Then consider pulling one of the block plugs, drivers side rear. Sediment will stack up here. If it is clean, and the block plug and pipes don't look bad I would button things up and run it. If you are full of sediment repeat on the passenger side. That might be enough as long as the plugs are not rotten. If they are bad you are in for some work, especially since the transmission is in the way on two of them. Went through this on an older chevy over the summer. Just a simple drain and flush. Ended up pulling the engine as well as the heads to get everything cleaned up. There is peace of mind knowing the condition rather than being in the middle of nowhere not knowing.
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Old 11-06-2018, 05:45 PM   #12
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Default Re: Sv 304 Water Pump Inspection How To

*sigh I sence good ole can o' worms syndrome coming on. Thanks for all the info. Well dadgumit if I'm gona fix it I best do it right the first time. Some of my plugs are new, done by my local shop. Uhg I didnt want it to come to this, how accessible are those rear plugs with the tranny removed and the engine still mounted? I want to rebuild the tranny anyways, need to do the t-case, might as well throw some brass plugs in. I sence alot of dead truck time in this things future...
Ive gutted my heater, a brand new core is in the mail (amazingly the exact same one) so its out of the equasion for now. I will try some clr and the dismantling from there. Again thanks for the info, more to come. Also, to Dealbreaker74 on stretching a dollar, were talking cut into hairs and tie together for string stretch
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Coming to you from behind enemy lines, in an unmarked barn, somewhere in The Communist West
(currently planning my escape)

1965 IH D11004x4 "Sherman"
1946 Dodge Job Rated half ton "Rusty"
1973 Fiat 850 Spider "il Cannoli"
Half of a dead 1958 Apache "Mad Dura-Max(to be)"

MEEEEEEEEEEERRY CHRISTMAAAS!!!!
RIP wallets everywhere.

Luke 2:11
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Old 11-06-2018, 09:33 PM   #13
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Default Re: Sv 304 Water Pump Inspection How To

Also, to Dealbreaker74 on stretching a dollar, were talking cut into hairs and tie together for string stretch

Ha! Been there my friend. There was a day that I had no money and plenty of time....Now my day is no money and no time...!
Keep your chin up. Its a cool truck and we all want to see you get it rolling.
Keep in touch!
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Old 11-06-2018, 10:37 PM   #14
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Default Re: Sv 304 Water Pump Inspection How To

Flush without a radiator in place:
Remove thermostat, remove radiator, build PCV pipe to connect editor hoses.
Your heater core is already out, so connect heater hose from inlet on engine to outlet own engine.
Flush engine with IR temp gauge to keep from overheating.
Go through several heating/flushing cycles.

When clean, remove jury-rigging and install radiator and heater core. New hoses, new thermostat, etc.
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Old 11-07-2018, 06:31 AM   #15
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Default Re: Sv 304 Water Pump Inspection How To

Those plugs on the back of the block are a 5 min job, once you get the transmission out of the way.
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