Crank Shaft Thrust Washers

[Michaelfb]

Hello again to you alpine experts ( I am getting there ),

My car has this issue that when I press the clutch of put it in gear it looses around 4-500 rpm's and has cut out as well. I am currently replacing leaking gaskets on oil sump so I decided to check the thrust washers under 3 bearing after checking the end play and is was substantial as you can see when you look at the washers, 1 is 2.19 and the other is 2.30 mm which combined is over a mm too thin from the specs I have for the washer thickness.

I cannot feel wear on the crank ends where the washer connects so my questions are ?

1. Would I be wise to get oversized washers
2. Does the black scarring on the thicker of the washers tell me something I should be aware of the check
3. The slot for the washer on the one end seems to have a zig-zag which is not apparent on the other - should the crank come out

Thanks again

Michael

 

[bernd_st]

Oversized thrust washers for 3 bearing blocks are not easy to get anymore plus they won't cure the "zig zag" on the block surface. Better to check out for a less worn 3 bearing block, because every repair attempt such a laser welding will get very expensive...

 

[Knightowl61]

Back in the late '60's I was at a ski resort new years eve during a bitter cold blizzard. When I went to leave the engine was frozen solid, jumping and pushing to pop in gear wouldn't work. Getting it to dad's garage we found a twisted thrust washer came out and locked the crankshaft. Apparently the washer worn thin enough to wear the block ends to sneak out. Both the block and bearing cap was damaged where the thrust washers went. At the time looking at the crankshaft the front and back bearings / washers kept the crankshaft from moving so I didn't put any thrust washers back in.
The car ran fine from late '60's to mid '80's.
Not recommended, just brought back memories. I still have the car but with a Toyota engine and 5 speed tranny.

 

[jumpinjan]

...after checking the end play and is was substantial as you can see when you look at the washers, 1 is 2.19 and the other is 2.30 mm which combined is over a mm too thin from the specs I have for the washer thickness...

A dial indicator is needed to do a proper end play measurement.
Yes, I would disassemble the engine and inspect it. It probably had some problems in the past and wasn't fixed.
You will need an oversize bearing (maybe two), but save the two used ones. Yeah, these 3-main thrust bearings are hard to find.
Jan

 

[absunbeam]

Are the trust washer specific to 1600 or 1725 engines or do they fit both? Have a variety of thrust bearings, will check thickness to see if there are varience.

 

[bernd_st]

They are not interchangeable since radius is different...

 

[absunbeam]

Thanks, will sort to that. See what I got, collecting these parts from Mn and NW Wisconsin. At least I got a parts book from them to ID things.

 

[sunalp]

If his avatar picture is the car in question, he has a 1725, and yes, the crank will have to come out
so may as well pull the engine.

 

[absunbeam]

What motor do you have in your Alpine? Are you going to the Invasion in Dayton Ohio? Have 1595 & 1725.

 

[Michaelfb]

What motor do you have in your Alpine? Are you going to the Invasion in Dayton Ohio? Have 1595 & 1725.

Hello, No not Ohio as I am in BC Canada but I have a 1968 SV 1725 and my next show is the Kamloops show in 2 weeks if I can get my thrust washers in time ....

 

[absunbeam]

Hi Mike-I see Sunbeam Specialties list them for $19, if they have them they maybe able to get them to you quicker than i can.They are closer to you. Let me know-Alan

 

[Michaelfb]

Hi Mike-I see Sunbeam Specialties list them for $19, if they have them they maybe able to get them to you quicker than i can.They are closer to you. Let me know-Alan

Thanks Alan, I have placed an order with them and are waiting for them to get back to me ... Ordered standard and .005 over just in case

 

[absunbeam]

I have always got items from them in 3 days, hope its a short wait!