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Old 11-19-2019, 11:32 AM   #6151
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Re: Restoring Rusty

more importantly this is the second time this has happened, a month or so ago I noticed the coolant was low, I topped it off and couldn't really tell where it went but it seemed like the 4.8L LSx water pump was weeping - it was hard to tell

now a month later this happened, how can it be that a weeping water pump goes back to good for a month than takes a dump again? I thought once they are bad they are bad?
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Old 11-19-2019, 11:59 AM   #6152
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Re: Restoring Rusty

What an awesome thread, I can't believe I was able to read the whole thing while on the clock at work. Suckers!

Your attention to details, ingenuity, and humor were all appreciated. Thanks for taking the time to log it all.
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Old 11-19-2019, 12:08 PM   #6153
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Re: Restoring Rusty

Those vent window seals are b!tch to replace, but you can do it with patience and soapy water or silicon spray.

Be sure to leave the old seals and tape in your front yard because that's your absolute right.
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Old 11-19-2019, 12:22 PM   #6154
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Re: Restoring Rusty

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Originally Posted by Gregski View Post
more importantly this is the second time this has happened, a month or so ago I noticed the coolant was low, I topped it off and couldn't really tell where it went but it seemed like the 4.8L LSx water pump was weeping - it was hard to tell

now a month later this happened, how can it be that a weeping water pump goes back to good for a month than takes a dump again? I thought once they are bad they are bad?
FWIW, I have seen Gen I SBC t-stat housing gaskets do the same thing. The leaks actually were worse on winter days after the truck had been sitting for days! Could be a difference in expansion rates of the metals, so as the temperature changes, the gasket isn't thick enough to compensate. However, those LS engines have some very nice gaskets, compared to GEN I gaskets, right?
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Old 11-19-2019, 11:34 PM   #6155
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Re: Restoring Rusty

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and having tried to fix it from the inside, this is how I drive around now, what a hack?
I'm a fan of making it work right and enhancing driveability. You can aesthetic-ize it later.
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Old 11-20-2019, 12:58 AM   #6156
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Re: Restoring Rusty

Puddles like that are why my 73 is manual steering now. Hate puddles under truck, like an untrained puppy
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Old 11-20-2019, 11:13 AM   #6157
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Re: Restoring Rusty

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Puddles like that are why my 73 is manual steering now. Hate puddles under truck, like an untrained puppy
I'm with you on leaks. They drive me nuts.

However, I must be lucky because I converted my 69 C10 from manual to power back around 1990 using a steering box, Pitman arm, pump, and hoses from a junkyard truck! The only thing that's been replaced since then is the return hose, because the old hose was looking pretty nasty. But I've never had a leak.

My 82 C10 came with power steering from the factory, but I did replace hoses and pump in 2015 when I converted the truck from 250 six to 350. No leaks there yet, but it's probably good for another 20 years.
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Old 11-20-2019, 11:38 AM   #6158
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Re: Restoring Rusty

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Originally Posted by wixthedog View Post
What an awesome thread, I can't believe I was able to read the whole thing while on the clock at work. Suckers!

Your attention to details, ingenuity, and humor were all appreciated. Thanks for taking the time to log it all.
What an awesome feedback, I can't believe I was able to write the whole thing while on the clock at work, JK JK!

May I please turn you on to some of my other works: HP Tuners Tutorials

this one is guaranteed to cure your insomnia if and when it flares up ha ha INNOVATE DLG1 Wideband O2 Oxygen Sensor Tuning Diagnostics Logging Air Fuel Ratio etc
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Old 11-20-2019, 11:39 AM   #6159
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Re: Restoring Rusty

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...Be sure to leave the old seals and tape in your front yard because that's your absolute right.
LOL, duh, where else would I put em'?
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Old 11-20-2019, 11:41 AM   #6160
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Re: Restoring Rusty

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However, those LS engines have some very nice gaskets, compared to GEN I gaskets, right?
100% agree on that, if nothing else the redesign of the LSx enjins is superb, tall cylinder heads with shallow lids for example to keep the oil in the enjin for example, ha ha, also smart intake manifold gaskets, no more running the beads of toothpaste on the China walls!!!
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Old 11-20-2019, 11:43 AM   #6161
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Re: Restoring Rusty

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I'm a fan of making it work right and enhancing driveability. You can aesthetic-ize it later.
thank you, we can do the entire triangle window like that and call it 0% tint and perhaps start a new trend
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Old 11-20-2019, 11:44 AM   #6162
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Re: Restoring Rusty

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Puddles like that are why my 73 is manual steering now. Hate puddles under truck, like an untrained puppy
I believe Chevy's came like that from the factory, the option was called PLS, aka Pavement Lubrication System

let me tell you, other than this mishap the LS engine is awesome no more leaks, no more squeeks
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Old 01-04-2020, 12:30 PM   #6163
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Re: Restoring Rusty

... well I don't usually do water pump repairs but when I do I pick the weekend after the Holidays that way I waste the first two hours breaking down all the cardboard boxes that somehow found their way into my workshop
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Old 01-04-2020, 12:34 PM   #6164
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Re: Restoring Rusty

so got the truck in and performed the extraction, and there are Lessons Learned here

1. GM made at least two different water pumps one with a smaller 1.88" diameter thermostat opening and another with the larger 2.05" diameter thermostat housing (after buying the wrong smaller one first thinking it would make sense for the 4.8L I exchanged it for the larger one which was the one I needed for my 2001 GMC)

2. GM also made a couple different thermostat designs and also after buying not one but two wrong style ones I finally got the correct one, the correct one for the earlier 1999-04 trucks seems to be the one where the stat and the housing are one unit.
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Old 01-04-2020, 01:08 PM   #6165
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Re: Restoring Rusty

I found in order to properly wire wheel the old crusty water pump gasket off of the driver side block I had to remove the accessory bracket and slide it out of the way, I like my surfaces pretty darn clean, and even using a gasket scraper I could not get all the pieces off otherwise (you can leave the power steering pump plumbed)
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Last edited by Gregski; 01-07-2020 at 11:27 AM.
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Old 01-04-2020, 01:11 PM   #6166
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Re: Restoring Rusty

not sure why two bolts were super rusty, one on either side, I don't think any of the six bolt holes go all the way through to the water jackets, I tested them with a poker and all of them bottom out

oh well I cleaned all of them threads and used anti seize on em as I always do, you're welcome future owner, ha ha
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Old 01-04-2020, 01:16 PM   #6167
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Re: Restoring Rusty

so um yeah, back to that thermostat, this unit is one piece the thermostat does not come out of the housing, no matter if you use a vice and a chisel... German Engineering at it's finest (no joke)
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Last edited by Gregski; 01-07-2020 at 11:25 AM.
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Old 01-04-2020, 01:22 PM   #6168
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Re: Restoring Rusty

my buddy Pontiac Mike found this write up on the early LS GM water pumps you mind find helpful / useful

https://www.lingenfelter.com/PDFdown...ats%20List.pdf
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Old 01-04-2020, 01:24 PM   #6169
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Re: Restoring Rusty

my buddy Pontiac Mike found this write up on the early LS GM water pumps and thermostats you mind find helpful / useful

GM Gen III & IV V8 Engine Thermostat Identification:
GM has changed water pump and thermostat designs on the Gen III & IV V8 engines (LS engines) several times over the years. Make sure you have the correct thermostat for your vehicle. This is especially important if you have had your water pump replaced because in some applications the service replacement pump and thermostat may be different than the original equipment pump and thermostat:

https://www.lingenfelter.com/PDFdown...ats%20List.pdf
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Old 01-05-2020, 04:03 PM   #6170
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Re: Restoring Rusty

Quote:
Originally Posted by Gregski View Post
I found in order to properly wire wheel the old crusty water pump gasket off of the passenger side block I had to remove the accessory bracket and slide it out of the way, I like my surfaces pretty darn clean, and even using a gasket scraper I could not get all the pieces off otherwise
I use Roloc 3M Scotchbrite discs on an air grinder. Knocks that stuff right off right now.
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Old 01-11-2020, 12:05 PM   #6171
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Re: Restoring Rusty

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I use Roloc 3M Scotchbrite discs on an air grinder. Knocks that stuff right off right now.
I skierd sand paper will chew the metal especially if it's aluminium
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Old 01-11-2020, 12:07 PM   #6172
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Re: Restoring Rusty

I knew I should have done did the belt at the same time as I replaced the water pump, but why do it once when you can do it twice, ha ha

no seriously I was a bit low on funds

went with all AC Delco junk to keep it as OEM(ish) as possible fully aware you never get the stock type quality parts once the horse is out of the barn anyways
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Old 01-11-2020, 05:56 PM   #6173
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Re: Restoring Rusty

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I skierd sand paper will chew the metal especially if it's aluminium
You can get fine 2" Roloc Scotchbrite pads that don't seem to do much to aluminum as long as you don't lean into them and don't dwell in one place.
Kiss the surface with them and let the plastic mesh do its' thing.
They cut the paper and silicone gasket crud off pretty quick. They'll eat up oxidation but not quite as fast.
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1959 M35A2 LDT465-1D SOLD
1967 Dodge W200 B383, NP420/NP201 SOLD
1969 Dodge Polara 500 B383, A833 SOLD
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1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
2009 Impala SS LS4 V8


RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...Please include at least the year and model in your threads. It'll be easier to answer your questions.
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