MBMB

These are off my '89 GT with <55k miles. What do you think?:







If your answer is "recoat," with what sort of coating?

Thanks,
Mark

namasgt

I would not reuse them, too much wear for re coating.

the flyin' scotsman

If the pics are accurate I've replaced better looking and the crank gear.

With a Gates belt, Porkensioner and the built proof water pump your good for many many years. (may want to check the seals also)

blown 87

Those are way past worn out, you can not coat them, they are no longer round, take my word on this.

MBMB

Thanks. What part that should be round is no longer?

Mrmerlin

the oil pump gear looks like its aluminum the new updated part is steel.
The cam gears need to be swapped out and the crank drive gear is also probably worn.
Note the 1mm spacer behind the oil pump gear is removed if you fit the steel gear

blown 87

They wear more on one side than the other, that is why when they start to get through the hard anodizing you can have half a gear that for the most part looks ok and turn it 180 and you can see all of the face of the top of the gears anodizing is gone.

IMHO if you can see any of the anodizing gone it is time for new gears, they wear at a alarming rate once they are down to soft AL.

MBMB

Oil pump gear is indeed aluminum.

Crank drive gear doesn't appear to be either aluminum or worn.

MBMB

All I can say is weird. Thanks. I will replace them. Merry Christmas to me.

namasgt

Are the gears Magnesium or Aluminum?
I thought they were Magnesium.

blown 87

Aluminum

White Lightnin'

Perhaps this other current thread can enlighten you on the predicament you are facing...

https://rennlist.com/forums/928-foru...as-please.html

Not good.

Speedtoys

Dont you mean..unobtanium?



I just -know- I may need a set this winter...its just how it'll work out.

MBMB

I think I'm in okay shape. Roger won't try to gouge me too badly.

AO

I think you could get away with recoating. It would be worth a try at the least - since they are NLA for now.

As for the makeup... there must be some magnesium (not sure if you can have an alloy) becasue when we were thinking of haveing them re-coated we had some dipped in an acid bath that would have been safe for aluminum, but doesn't play well with Magnesium (so I was told). This was the result.