Gotcha.  Another thought from a certain builder is the conversion from auto to manual could be the root cause - if the engine wasn\'t balanced, it could cause it to go out of whack...

Hi Bish,
The Mazda cast iron flywheels are balanced with the original engines,but also high rpm or low oil in the sump combined with high G cornering could start that problem.
What oil were you using?
Regards
Carl

Check out the rotary resurection site as well - he\'s got examples of damage, and the likely causes of them - an excellent site for showing what can happen !
 
Although no pics of spun bearings

This is what happened to someone when a front thrust bearing failed -
 
http://www.aaroncake.net/rx-7/damage.htm
 
I guess all your bearings are good at the front of the engine ?

Quote from: HaywardRotary;700556What oil were you using?

Thanks for the reply chief.  Halfords Mineral oil - same as for the previous 5 years...  It was at (high) motorway speeds in france.  Temps started to rise VERY quickly, and when keyed off, the engine cut out straight away.

Quote from: Prof;700558I guess all your bearings are good at the front of the engine ?

I don\'t remember them looking bad, but in strip down, the torringtons and everything looked good.  I\'m going to clean it all this week, and see what it\'s like when clean, grease free, and dry.

talking of which - what liquid to use in my parts washer that I got xmas before last and never unwrapped?  Would Petrol be OK as a degreaser?

I used that Comma Hyperclean - that stuff is good - really gets the oil, looser carbon and general crud off easily

Cool, thanks!

Quick question - what is it with the different sized 13btt stationary bearings???  From Mazdatrix:

Main Bearings For 93-95 Twin Turbo
Part Number Color Code Bearing Thickness
10-E040-NF01 Yellow 1.980mm = .07795"
10-E050-NF01 Green 1.983mm = .07807"
10-E060-NF01 Brown 1.986mm = .07819"
10-E070-NF01 Black 1.989mm = .07831"
10-E080-NF01 Blue 1.992mm = .07846"
10-E220-NF01 Yellow 1.988mm = .07827"
10-E230-NF01 Green 1.991mm = .07839"
10-E240-NF01 Brown 1.994mm = .07850"
10-E250-NF01 Black 1.997mm = .07862"
10-E260-NF01 Blue 2.000mm = .07874"
Thickest is .07874" (least clearance) minus thinest of .07795" = .00079 TOTAL range --- This is LESS than ONE thou !

Can someone help here?  I\'m replacing an eshaft into a pre-existing stationary gear - howdo I measure 0.02 mm difference?

Quote from: Archbish;700639- howdo I measure 0.02 mm difference?

 
ya penis doubled mate lol sorry couldnt resist:spank

Dial Gauge, or micrometer, but it\'s curved isn\'t it, so not sure how easy that would be ?

Quote from: battyman;700654ya penis doubled mate lol sorry couldnt resist:spank

Well, it was big enough to make your eyes water...

Quote from: Prof;700662Dial Gauge, or micrometer, but it\'s curved isn\'t it, so not sure how easy that would be ?

okey chokey...  this\'ll be an interesting challenge *grin*

on a shaft that is used but in good condition generally this one will suit,but measure to be sure.
10-E230-NF01 Green 1.991mm = .07839"
Regards
Carl

so here\'s the bearing after being removed with a rudimentary drift...



so I would guess this is probably not good.... *grin*

and here\'s the shaft:



Thoughts?

fecked ? :2eek

Quote from: Prof;701463fecked ? :2eek

 
yup and then some

right, so shiny new eshaft, measured up in several places, along with the stationary gear (sans bearing).
- EShaft av diameter is 42.92
- Gear av diameter is 47.02
so to get clearances for different bearings is:

(Gear dia - eshaft dia)/2 - bearing width, right?

so that gives us these clearances:

eshaft,   stationary gear,   bearing thickness,       clearance
42.92,           47.02,                           2,                       0.05
42.92,           47.02,                           1.998,               0.052
42.92,           47.02,                           1.997,               0.053
42.92,           47.02,                           1.994,               0.056
42.92,           47.02,                           1.992,               0.058
42.92,           47.02,                           1.991,               0.059 <- Carl\'s suggestion
42.92,           47.02,                           1.989,               0.061 <-within tol
42.92,           47.02,                           1.986,               0.064 <-within tol
42.92,           47.02,                           1.983,               0.067 <-within tol
42.92,           47.02,                           1.98,                       0.07   <-within tol


Thoughts?? (other than vBulletin is .... at tables)