Possible cooling bind avoided:

thedave925

Since 9/16/05
Nov 9, 2005
626
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East Bay, Cali
Cliff notes:
I used a vacuum and water to flush a paper wad out of the block's water jacket.

disclaimer: BY NO MEANS ARE THESE RECOMMENDED METHODS WHEN OPERATING ON A 7M

What happened:
I was prepping the block deck and needed to seal off the water jacket, bolt holes, and oil galleys. I used folded strips of papertowel, which successfully kept out all debris, sprays, and even withstood the occassional graze from a brass(coated! :3d_frown:) wire wheel.

If you've stuffed water jacket holes, you will have noticed that your trying to stuff concave openings that open wider the deeper you penetrate :naughty: so it is difficult to determine what works best.

With that in mind, all my work went fine until it was time to set the head. Using needle nose pliers, I skillfully pulled out all but the EXHAUST SIDE PLUG OF CYLINDER ONE (1), which shoved deeper before I could artfully retrieve it.

That battle was lost, but not the war.

I continued to assemble the engine, reaching the point where all of the coolant lines were accounted for and therefore either in system or plugged off.

At first I intended to actually leave the paperwad there and hope for the best... NO.
I lost sleep over it, and I hate doing work over, and decided to flush it out. So I traded the hose from the union-nut deal on the back of the head for a feet-longer piece and pulled the lower radiator hose from the waterpump/block outlet.

As I was mulling over how I was going to adapt the garden hose to the long coolant hose, it hit me that I have a shopvac who's end would fit into the lower rad hose, and I would be able to suck rather than blow the paper wad out. So I got a small bucket of water, put the coolant line in, hooked up the shopvac to the rad hose and hit the power.

After 2 gallons of water siphoned through the engine, I opened up the vacuum and found not one but two strips of paper. Go figure.

My intention with this post is an attempt at looking smarter :biglaugh:


J/k - DON'T GIVE UP is the moral

-Dave
 

thedave925

Since 9/16/05
Nov 9, 2005
626
0
0
East Bay, Cali
2 weeks and 5 tanks of gas later, no heating problems still.

My fan shroud busted (age), but with the new PWR radiator sitting in there, it hasn't mattered. I'm running one bottle of water wetter and distilled water. I've driven pretty hard on a stock setup without issue.
-Dave
 

Poodles

I play with fire
Jul 22, 2006
16,757
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43
Fort Worth, TX
what water wetter are you using? only ONE is rated to protect vital cooling components...

unless you what to destroy the bearings and seals in the waterpump, have your head eaten fromt he inside out, or your new radiator clogged with barnicles, get some coolant in there (toyota red is best)
 

thedave925

Since 9/16/05
Nov 9, 2005
626
0
0
East Bay, Cali
This was just a preliminary test using water because its cheap, but I'm on it as it would suck to have my work time and money go out the window like that.

Redline Waterwetter for 4-stroke gasoline engines is what I'm using, as it works.

I have Toyota Red antifreeze waiting to go in. Antifreeze not only prevents blown freeze seals, but raises the boiling temp of the water, because airbubbles in the water don't transfer heat.
-Dave
 

Poodles

I play with fire
Jul 22, 2006
16,757
0
0
43
Fort Worth, TX
royal purple's water wetter is the only one rated to protect like coolant, but they still recommend coolant...

just making sure you don't do what the previous owner of my used engine did (the head was eaten pretty badly, so badly infact that a HG won't seal)