diagnostics advice olds 425 toro
#1
diagnostics advice olds 425 toro
I am concerned about blow by I get a lot of white smoke from my valve cover breather, hardly any from exhaust, I havent done a compression test yet. my fear is piston rings, do these symptoms seem right? I will do the compression test when I get the tools this week, dry and wet. off hand anyone know what cylider pressures i should be looking for, its a high mileage engine and I know it needs freshend but was hoping not to jump in all at once.
#2
Main thing to look for (as I'm sure you know) is consistency between cylinders, within say 5%. That being said, as long as you're getting maybe 120 psi or more I'd be satisfied. For diagnostics, it will help quite a bit to know the details of the engine and the results of the wet/dry tests.
#4
I am concerned about blow by I get a lot of white smoke from my valve cover breather, hardly any from exhaust, I havent done a compression test yet. my fear is piston rings, do these symptoms seem right? I will do the compression test when I get the tools this week, dry and wet. off hand anyone know what cylider pressures i should be looking for, its a high mileage engine and I know it needs freshend but was hoping not to jump in all at once.
#6
Thanks for the information, I hope to do the compression test this weekend, about the wet test...just a couple of ounces of motor oil in the sparkplug hole how long does it take to get rid of oil in the cylinders?
#10
compression test is done, i used a capfull of oil for the wet test. this was done with a harbor freight gauge so take with a grain of salt I guess. cylinder#, dry/wet
1,30/40 2,90/150 3,120/120 4,70/135 5,88/120 6,120/145 7,30/40 8,120/150 I wasnt sure how long to crank the engine so I dont know if these are accurate IMAG0301.jpg
1,30/40 2,90/150 3,120/120 4,70/135 5,88/120 6,120/145 7,30/40 8,120/150 I wasnt sure how long to crank the engine so I dont know if these are accurate IMAG0301.jpg
#11
You have issues with #1 and 7. I crank the engine until the gauge won't go any higher.
From your pic, you have some issues beyond a normal old age engine.
From your pic, you have some issues beyond a normal old age engine.
Last edited by oldcutlass; May 24th, 2013 at 02:58 PM.
#12
oops i did it on a cold engine, I might retest saturday after I warm it up, looks like I have a rebuild coming in the near future, now the debate is rebuild the 425 or look for a 455 core. ballpark how much to re ring the pistons? I can pull the heads and such but have no facilities to pull the engine.
#15
rebuild
I am new to this, is $3000 a good ballpark to rebuild the engine. parts and labor, I know there is no telling how much machine work until its apart, but I think a rebuild is above my skill level so I will have to get it done at a shop.
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