"aberson Bresident of the FullyAssed Committe" (emaxxbl)
05/26/2015 at 19:20 • Filed to: None
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"aberson Bresident of the FullyAssed Committe" (emaxxbl)
05/26/2015 at 19:20 • Filed to: None | 6
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I believe that is dried antifreeze on the exhaust valve
and it gets worse, all the exhaust valves look like that
AND the No.3 and 4 pistons have it on there as well
It shouldn’t be too hard to fix though, most of the stuff falls right off of the pistons and at least i have some money to throw at it now
norskracer98-ExploringTheOutback
> aberson Bresident of the FullyAssed Committe
05/26/2015 at 19:29 |
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What would’ve caused that?
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aberson Bresident of the FullyAssed Committe
> norskracer98-ExploringTheOutback
05/26/2015 at 19:39 |
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bad head gasket leaking antifreeze into the cylinders and then the heat from combustion burns it straight onto the valves/pistons. I’m really surprised its not worse
If only EssExTee could be so grossly incandescent
> aberson Bresident of the FullyAssed Committe
05/26/2015 at 19:45 |
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What, you thought the coolant would stay nicely in its channels where it belongs? Hahahaha
desertdog5051
> aberson Bresident of the FullyAssed Committe
05/26/2015 at 19:45 |
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Ahhh... The deadblow hammer. That will fix anything.
(cylinder wall looks good, though)
RacinBob
> aberson Bresident of the FullyAssed Committe
05/26/2015 at 19:51 |
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I wouldn’t dispair at what I saw. Its a 40+ year old engine, they all kind of look this way. At least you cannot see daylight through the cracked valves. If it had good compression before teardown, who cares? If not, you better find out why. It sounds like a blown head gasket.
To be honest I wouldn’t touch the pistons if the compression is good. If all you are looking for is a budget build driver, since the head is off, I suggest taking the head apart and take a hard look at the valve guides and seats. Keep the parts specivic to the cylinders. Soak the head in a degreasser tank, check the head for straightness, put new valve stem seals into it and put it back together.
As for the bottom end, I would pull the rod bearings and main bearings in place and see what they look like, if there is no distressing wear, re-use them. Obviously applying to the cylinders they came from.
You also need to check the cylinder bores to see if obvious wear. I would pop out the pistons to again look at distress in the skirts and the rings, if none reuse them.
The alfa motors are very strong. If it’s a budget build, re-use the apparently good parts. They won’t let you down. My guess is the worst parts will be the valve guide as they have a reputation of wearing, I hear they are a pain to install so if budget is important, you might try keeping what you have and see how they work before replacing them. As you know, pulling the head is about a 90 minute job.....
Alfas are intended to smoke just a bit. Have fun!
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aberson Bresident of the FullyAssed Committe
> desertdog5051
05/26/2015 at 19:54 |
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that deadblow hammer is favorite tool
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RacinBob
> RacinBob
05/26/2015 at 19:55 |
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Ps, something that I think I would investigate is if there are O rings at the bottom of they cylinders. I seem to recall that there are. The last time I pulled an Alfa Head was about 1984 and my O rings were a lot younger than yours. If there are O rings down there and they fail, aintfreeze ends up inthe engine and that is a bad day indeed. Also, do not overtighten the falve cover nuts or you will crack the cover. Don’t ask how I know.
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RacinBob
> RacinBob
05/26/2015 at 19:59 |
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PS - You might also buy new clutch and brake master cyl, as well as clutch slave cyl. My ‘74 had two of three fail las fall. You can get new made in italy parts from Rock Auto. All three cost less than $200 last.
Do the calipers too, rebuilds are cheap.
sdwarf36
> aberson Bresident of the FullyAssed Committe
05/26/2015 at 23:45 |
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I just see carbon on the valves. Nothing to do with anti freeze.
If the head gasket was leaking, and the car was a runner, the hundreds of PSI of cylinder pressure would win out over the 15 psi of water pressure. If it leaked in while sitting, the bad cylinder would be cleaner than the others.
They all look the same-and its running rich-that the carbon build up. Pretty normal for the age. Remember-”decarbonizing” was still a thing back then.
AMGtech - now with more recalls!
> aberson Bresident of the FullyAssed Committe
05/27/2015 at 03:34 |
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Looks pretty normal to me. If it was burning antifreeze the offending cylinder would essentially be getting steam cleaned and therefore be much cleaner than the others, often to the point of having no carbon build up at all.
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RacinBob
> RacinBob
05/27/2015 at 19:21 |
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So did it have a miss? If it didn’t you may not have been that the head gasket was blown.... A
problem with these engines is its an aluminum head and all aluminum block that is held together with long steel rods. Aluminum has a greater coefficient of expansion than steel so especially in cold weather the head gasket can get loose. Generally the bores stay tight but what can happen is it leaks oil and or water out the side of the block. Its pretty interesting to jump start an alfa at -10. the oil just comes oozing out until the engine warms up. My alfetta did this, dumping oil in the water. Being too lazy to change the head gasket, I thew detergent into the radiator. With all that oil, the hozes were as soft as a baby’s bottom.
By the way, if your’s is a ‘75 or newer, you may find it has no oil pressure at idle when warm. Don’t worry, a lot of them did that. Alfa started hardening the crank shafts in about ‘75 and where they cross drilled them they would hammer in a lead slug. Unfortunately, the hardened cranks would not hold the plug and when they blew out they would leak back oil. I guess the pump could not keep up at low RPM but was fine at higher RPM. Mine ran fine for 5 years that way.
Also a cheap fix if your exhaust manufold broke a ear off of the outlet us clamp it together with a rod hanger like this if you want a ghetto fix... http://lwmeyer.com/products/strut…
PS9
> desertdog5051
05/31/2015 at 17:22 |
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“Deadblow Hammer” Sounds like the name of a super move in a fighting game...
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desertdog5051
> PS9
05/31/2015 at 18:20 |
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It does, doesn’t it. It is a thing, though. AKA shot hammer.