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Old 22-07-17, 06:25 PM   #1
Nev B
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Default Another lump to tinker with , 1936 Gray

I felt sorry for this lump of cast iron and aluminium last week so I dragged it up the M6 from Brum to Rainford , it's a 1936 Gray, made in Detroit USA , 4 cylinder side valve with a startermotor ( knackered) and a dynamo also knackered. The water pump is driven from the back of the Dynamo so it will have to go back on even if it's not going to produce electricity.
It's as bad as the pictures show, getting it stripped down has been a battle, a day to get the exhaust manifold off, another to get the head off etc etc , but apart from the pistons and valves being stuck fast the internals don,t seem too bad , the crank and bearings seem in good order, the gear box hopefully just needs a clean up .
The cylinders have been left to soak overnight and with luck the pistons may move tomorrow .
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1940s Stuart Turner HY1
45 hp Gray Marine
Petter Mini Twin marine
Thornycroft DB2 Handybilly marine
1917? Fairbanks Morse two stroke
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Old 22-07-17, 06:32 PM   #2
listerdiesel
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Crank looks very good, interesting lump!

Peter
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Old 22-07-17, 06:33 PM   #3
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More pictures

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1940s Stuart Turner HY1
45 hp Gray Marine
Petter Mini Twin marine
Thornycroft DB2 Handybilly marine
1917? Fairbanks Morse two stroke
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Old 22-07-17, 06:42 PM   #4
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You'll definitely want a boat to go with that.

NHH
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Old 22-07-17, 06:51 PM   #5
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Quote:
Originally Posted by nickh View Post
You'll definitely want a boat to go with that.

NHH
Nah can't really do boats , could just about cope on a canal, anything rougher I,m feeding the fishes
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1940s Stuart Turner HY1
45 hp Gray Marine
Petter Mini Twin marine
Thornycroft DB2 Handybilly marine
1917? Fairbanks Morse two stroke
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Old 28-07-17, 04:58 PM   #6
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It's coming along steadily, only one piston out so far, the others are still soaking in Diesel , the gear box is off, like everything else it was stuck fast but with a little persuasion it turned again . Two of the sparkplugs had sheared off while trying to remove them, this was the after a lot of heat and soaking in Diesel, removing them proved easier than I thought, I ran a drill through them then cut two slots in the remaining metal and peeled the threads out .
Today's task was to free off the valves , after using a lot of penetrating oil and heat they finally gave in and I was able to turn them , that was only the half of it , every cam follower was stuck, so it was time for the blowlamp again to get everything warmed up and start on my fourth tin of spray , it took a couple of hours but everything is freed off now , all the valves will be taken out later and ground in .
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1940s Stuart Turner HY1
45 hp Gray Marine
Petter Mini Twin marine
Thornycroft DB2 Handybilly marine
1917? Fairbanks Morse two stroke
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Old 02-08-17, 06:27 PM   #7
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Giving the pistons a soak in Coke for a few days, I,ve tried Diesel, ATF and acetone , various penetrating fluids with only one piston giving up the fight , the other 3 are stuck fast so nothing to lose with the Coke , apparently the phosphoric acid in the Coke does the trick , we shall see .
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1940s Stuart Turner HY1
45 hp Gray Marine
Petter Mini Twin marine
Thornycroft DB2 Handybilly marine
1917? Fairbanks Morse two stroke
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Old 02-08-17, 08:50 PM   #8
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I had the same issue with my 2VTH. I tried coke with limited success.
The method I used was to place a piece of bar stock on top of the piston and clamp it down with a thick plate using the head nuts. With a good load applied I hit the plate very hard with a sledge hammer. This had them moving in no time.

My pistons were heavy duty Diesel items that took the loads easily. I would use a piece of wood the same diameter as the bore rather than the bar I used.

Good luck.

Dan.
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Old 04-08-17, 06:42 PM   #9
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I don't know if it was the Coke or the " gentle " tapping of a block of wood in the cylinder but now 2 pistons are out , the remaining two are still soaking in Coke.
A bit more progress on other parts, the snapped off studs have been drilled out of the exhaust manifold and crankcase .

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1940s Stuart Turner HY1
45 hp Gray Marine
Petter Mini Twin marine
Thornycroft DB2 Handybilly marine
1917? Fairbanks Morse two stroke
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Old 04-08-17, 06:44 PM   #10
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Piston showing the fungus that holding it in the cylinder
The oil ring is stuck in but hopefully that will spring out again

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1940s Stuart Turner HY1
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Petter Mini Twin marine
Thornycroft DB2 Handybilly marine
1917? Fairbanks Morse two stroke
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