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Hi all. I purchased an 86 quad in September. Upon getting it home I noticed that it had a seam leaking on the top tank of the radiator. So I pulled it and had it soldered by a specialist. With the radiator removed, I could see that the ac compressor was missing a belt. I also noticed that someone had cut the wire to the magnetic clutch on the compressor. So with help from the forum( thank you very much), I was able to locate the blue power wire, install a short section of wire and reconnect it. 12 volts will energize the mag clutch. So now my questions. When I went to install the new belt from Centerline Alfa I noticed that there was very little clearance between the compressor pulley and a large bar below which I assume is related to the steering or a sway bar. I really didn’t identify it at the time. With some tugging I was able to pull the belt around the compressor pulley. But it runs very close. Maybe a 1/4” clearance On the pulley and the belt runs very close parallel to the bar. Should it be this close or is it an indication of a collapsed motor mount? The crank shaft pulley appears to have about 1/2” of clearance. I can get my finger between the pulley ant that bar. I believe I read somewhere here that the motor leans one direction but I don’t remember which way.

Second question. The front of the engine and oil pan are covered with nasty caked on oil build up. I’ve been attempting to clean it up with solvent but I don’t have a water hose in my shop and its winter here in Alaska. Hoses and the Alfa are all put away. So I’m doing what I can. From your collective experience, Is the leak more likely to be a crank seal or an oil pan gasket? I’ve noticed several threads on pan gasket replacement.

So if it sounds like I need to replace the motor mounts, I would like to do it now while I have the radiator, shroud, and fan out of the way. If I do the motor mounts it would also be a good time to replace pan gasket, while the engine guard is off. Now would also be the time to do a crank seal.

So what do you all think? That’s the slippery slope.

Thank you one and all.
Respectfully,
Mike Sulley
 

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Agreed re front seal. But the fan also picks up and distributes oil and dirt from all over and pushes it onto the front of the engine. So everything sort of ends up there.

Doing motor mounts on a Bosch Spider is not super fun. Exhaust side isn't bad. Intake side is tough unless you remove the plenum. By "pan gasket" you mean the upper one, to the block? That's really tough with the engine in the car, though if you lift the engine it makes it possible. You pretty much have to have both motor mounts off to get access to the pan bolts behind them.

Maybe wash down the engine as best as possible, then when clean look more closely at where the actual leaks are?
Andrew
 

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Two observations:

- There had to be a reason why the previous owner disabled the A/C compressor. I assume you haven't been able to test it, since the cooling system is off (and who needs A/C in Alaska in the winter?). Check it carefully once you have it running again.

- The odds are much greater that the crankshaft seal, rather than the oil pan gasket(s), is the source of your oil leak. Gaskets don't tend to wear out, while seals most certainly do. Given that replacing those gaskets is the more difficult job, if you want to do something, the crankshaft oil seal is the more logical choice for replacement. Lots written about crankshaft seal replacement - search for threads containing the words "Chicago Rawhide" (seriously).
 

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don't put the radiator back, as you are going to tackle the front oil seal....often that big nut is a a real pit a** to undo and to have some space to get an airtool down there sure helps!
 

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Hi there, I believe your 86 spider has a water pump driven rad fan, if so, the typical hint that the engine mounts need to be replaced is the fan rubbing on the fan shroud.
I agree with the others and it isn't too bad of a job since you have the radiator out already, my 77 was a 38mm socket, that and an impact gun and you are away to the races. Once the pulley is off and the belts are all out of the way, before you pull the old seal out, go to town in there with non chlorinate brake clean and an old toothbrush, maybe stuff a paper towel in the space between the seal and crankshaft nub. The seal is a 35x50x10 I believe, get a viton one, it will handle the heat and rpm better, you should be able to get one locally in Alaska at a bearing place.
 

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Hi there, I believe your 86 spider has a water pump driven rad fan, if so, the typical hint that the engine mounts need to be replaced is the fan rubbing on the fan shroud.
I agree with the others and it isn't too bad of a job since you have the radiator out already, my 77 was a 38mm socket, that and an impact gun and you are away to the races. Once the pulley is off and the belts are all out of the way, before you pull the old seal out, go to town in there with non chlorinate brake clean and an old toothbrush, maybe stuff a paper towel in the space between the seal and crankshaft nub. The seal is a 35x50x10 I believe, get a viton one, it will handle the heat and rpm better, you should be able to get one locally in Alaska at a bearing place.
Make sure the pulley shaft does not have a ware ring on it. If there is a grove on the shaft, the new seal will not stop the leak. I had to purchase a used one to replace the scared pulley.


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Discussion Starter #8
Thank you all for your thoughts.

I confirmed that the bar below the radiator is indeed a sway bar. I also noticed that the engine guard has been lowered from the oil pan by installing two 1/4” body washers between the cross member and the guard. I took a look at both motor mounts and they don’t look terrible. The rubber looks relatively fresh. They are not cracked but have a visible scaley patern on the outside. I believe they have been changed once in the car’s life. I also believe that the radiator shroud and fan have also been changed. Perhaps because of damage from failed mounts.

alfajay I share your concern as you have suggested about the disabling of the ac compressor. I can see possibly cutting the ac fan belt if it was bad and I didn’t want to go to the trouble on replacing it. But I can’t see cutting the mag clutch wire. Why not just unplug it from the relay. There is a bullet connector right there. Weird. I can spin the compressor by hand, but will watch it closely once I get it running. The system seems to have pressure but haven’t got gauges on it yet.

As suggested by the group, I will attempt to replace the front crank seal. I checked it out and there seems to be a washer at the front of the pulley nut that prevents a socket from fully engaging on the pulley nut. Other threads that I have checked out mentioned a lock washer that folds over a flat on the nut to prevent it from turning, but that does not appear to be what I have. Couldn’t see the washer folded over on a nut flat. But it looks like the washer must be removed before you can get a socket on the pulley nut. Any one faced this problem or have any suggestions?

I appreciate all your help. Thanks so much.
Mike
 
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