crank endfloat

[Gadgetman]

I'm overhauling my engine at the moment and with new Std thrust washers the crank end float is 8 thou (0.102 - 0.203 mm) the spec in the text of the manual says in the text 4 - 8 thou (0.102 - 0.203 mm) but in the dimension and tolerances table it says 4-6 thou (0.1 - 0.15mm)

Which max figure is correct?????

next dilemma.... 

The oversize thrust washers come in + 0.005" so that would give me an end float of 0.003" which 1 thou under the minimum spec.

Do people lap the back (non white metal surface) of thrust washers to get the required minimum clearances????????

[Pete Lewis]

exactly  what engine is this    as the specs change a bit depending what it is 

Pete

[Gadgetman]

hi Pete:

1600 with scroll oil seal crank

[NonMember]

Given that the thrust washers are only available in 5 thou oversizes, the 4-8 figure is the only one you can work to. If you exceed 8 (i.e. get to 9) then an oversize thrust puts you back at 4. Simples ?

Actually, I suspect it wouldn't take long for one thou of wear if you put the oversize in to get 3 thou initial end float.

[Pete Lewis]

I echo that 

My 2000 had one wrong way round  dont ask about the state of the crank,   the 0.018"  looked like 1/4"  visual  

Just bedded a oversize replacememt and monitoring where the wear takes it ...so far so good.

Nothing wrong with a scroll    it  cant wear out  .

 

Pete

 

[dougbgt6]

I wouldn't lap the back, too much trouble which could do more harm than good. I would go with 3 thou, as Rob says they wear quick enough. I joined the 1/4" end float club when I bought my car, long before Pete, I have the vintage T shirt.

db

[Pete Lewis]

Doug,   Do you wear it   now youre not  mowing the lawn  

Pete

[dougbgt6]

Pete,

I was somewhat thinner then and that T shirt looks like a sausage skin on me now. I'll put a picture, on "the other" site, for your delectation.

Doug