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 Author Thread: Burnt pistons
OldMachinist is not online. Last active: 12/19/2014 4:53:20 AM OldMachinist
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Burnt pistons
Posted: 12/20/2011 08:43 AM

Last winter I had the pleasure of replacing a engine in a 04 GMC Envoy that a young woman drove until it quit after ignoring all the gauges and warning messages that said the engine was overheating. So the other day I started tearing the old engine down to scrap it out and I just wanted to share a couple of pictures of the burnt pistons. As you can see they got hot enough to melt the edges off.


Bobcat 453F ,Loegering steel tracks, Grouser steel tracks, 48" Dirt bucket, 48" toothed bucket, grapple bucket, 72" hydraulic vee snow plow and utility forks, 1954 Ford 860, 1952 Allis Chalmers CA, 1947 Case SC, Nashville IL USA
skidsteer.ca is not online. Last active: 7/21/2014 8:31:40 PM skidsteer.ca
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Re: Burnt pistons
Posted: 12/20/2011 12:11 PM

sounds like somthing my .......   , oh better not go there! JK honey ;)

Actually my wife has been quite good with mechanical things, thankfully.

Yep those got a bit warm. Did you have to help them out of the block with a 4x4 and large hammer?

Ken


NH LS 160, S150, S185 Hoe Brusher Grapple Auger, Mixer Tiller Soil Conditioner Trencher Tracks Snow Blade Wood Splitter Stump Grinder Land Plane. Dealer Virnig Erskine Componets Plus Wallenstein Bauma Lite
OldMachinist is not online. Last active: 12/19/2014 4:53:20 AM OldMachinist
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Re: Burnt pistons
Posted: 12/20/2011 01:00 PM

It was a 2x2 and large hammer. She called her mother when the first warning said coolant overheated and they decided that she sould try to make the rest of the way to school(20 more miles). I was out in the shop and they didn't want to bother me. She got another 5 miles before it said engine overheated and still keep driving. 3/4 of a mile further the engine siezed.

When I went to go get it with the trailer I found right a way that it had busted a heater hose. I said I had the pleasure of replacing the engine what I really wanted to say was that I'd like to wring neck of the engineer/engineers that designed a car with the front differential bolted to the side of the engine oil pan with one of the axles going thru the pan so that you have to drop the whole front suspension to remove the engine. You see the differential bolted to the side of the pan in the picture below.


Bobcat 453F ,Loegering steel tracks, Grouser steel tracks, 48" Dirt bucket, 48" toothed bucket, grapple bucket, 72" hydraulic vee snow plow and utility forks, 1954 Ford 860, 1952 Allis Chalmers CA, 1947 Case SC, Nashville IL USA
Tazza is not online. Last active: 12/17/2014 1:41:22 PM Tazza
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Re: Burnt pistons
Posted: 12/21/2011 02:42 AM

Impressive, if you are going to stuff an engine, you need to do it rightSmiley

Thanks for the pictures OM, i think i have a picture somewhere of a D722 that had a nice size crater in a piston because it had a leaky injector that melted the side of the piston and caught on the bore.


Bobcat 763 burntSadbut i'm working on it!, 04 S150 with air and a smooshed cab, S250 turbo.
RJSStamps is not online. Last active: 12/27/2012 1:37:10 AM RJSStamps
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Re: Burnt pistons
Posted: 04/28/2012 04:45 PM
lol, back in 1993 I was driving my 78 Chevy Blazer 4x4 to work. A month earlier in a pinch I had grabbed the wrong head to replace one that cracked. I hadn't realized it was the wrong head till a week later. I couldn't change it though as I was working 12 hours a day 7 days a week. on this morning I get stuck behind a semi going 45 in a 55. Running late I pass him doing....ummm....90..... Well right in front of this semi was a state trooper, didn't know that till I was beside him, too late. As I pass him POOF! A huge puff of blue smoke, then add in white as well. Just blew the engine! Sprayed oil all over that pretty white trooper car too. I get out open the hood and there was a loud pop and then something spinning on the ground. It got so hot the temp sender exploded! The trooper was nice enough, no ticket! Turns out the head put on was a 350 head not a 305. That 350 head a caused #1 to lean out under load and melted a hole right through the center of the piston. The 305 uses larger valves and it starved the opposite side of fuel causing the burned piston. Usining 305 heads on a 350 will make lots of torque and give you plenty of kick properly set up cam and carb wise. I ran a Holley 650 with an offroad cam specially ground for torque The combination allowed my Blazer to run and win a lot of mudbogs and in one summer I won 3 times the money that the build cost me.oh, I did have to was the troopers car.....but he took me to workSmiley
RJSStamps is not online. Last active: 12/27/2012 1:37:10 AM RJSStamps
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Re: Burnt pistons
Posted: 04/28/2012 04:48 PM
That should be WASH the troopers car.....I hate this keyboard!!!!
Tazza is not online. Last active: 12/17/2014 1:41:22 PM Tazza
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Re: Burnt pistons
Posted: 04/29/2012 02:37 PM
You sure were lucky that he didn't make your day worse with a ticketSmiley

Bobcat 763 burntSadbut i'm working on it!, 04 S150 with air and a smooshed cab, S250 turbo.
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