heinrich

What could you do for a crank and block that has experienced thrust bearing failure? I have one of those. Essentially spun bearings and narrowed crank journals.

There is NO need for cosmetic improvements on the cam timing gears. Simply need to coat them in whatever will last longest. I'm not sure about lubrication since belt slippage would be ba-a-a-ad.....

randy803

Oh yeah, just did a set of 32valve cam covers last night. Man I can tell you one thing Porsche decided NOT to metal finish these covers becouse they coat them in that thick insulation paint and they were ROUGH under all that crap. We spent 4 hours prepping the cam covers! But to answer your question yes we have done them and when we are done they are nice. We will have some pictures of the cam covers up tommorow.

Bill Ball

The cam gears do not need to look good - they are hidden by covers that should be left on for protection from foreign bodies. The main thing needed for belt life is to keep it clean (and properly tensioned). Lubing would attract dirt and lubing a ribbed rubber belt doesn't sound desirable anyway.

randy803

Bill we are talking DRY FILM LUBRICANTS not oil or grease no dirt will be attracted nor will the belt have any damaging residue placed apun it during operation. I agree as I said above you cannot see them so as long as they are corrosion protected and smooth you are good to go.

byrdman454

I am re-posting this old thread to see if anyone has had their cam gears re-coated lately. I emailed randy803, but have not heard back yet. Does anyone have any contacts for getting this done cheaply?

Thanks

Big Dave

Mike:

Contact Andrew Olson on this list. I know he's had it done recently...I had another set of gears done with his within the last year.

AO

IIRC Randy803 is out of commission for quite a while. "MrLexse" did them for me, but I think you can do them yourself. The material is DFL-1 by techline (Dry Film Lubricant) Here's the thread with the link for the techline website. https://rennlist.com/forums/showthre...ighlight=Gears

If you send your's out to be dipped, be careful. This is what happened to the first batch! https://rennlist.com/forums/showthre...ighlight=Gears

I have not installed mine yet as they were originally for my '82, but now that i have the GT it won't be long before I get them installed.

Imo000

Go with an original unworn set as opposed to a re coating the old one. The old ones, even after re coating, will be still just a set of worn gears but with new coating.

AO

And your point is?

Imo000

The main point is that the re coated gears will still be worn down an somewhat out of spec. The teeth will have the worn down pattern and less surface area for the belt to grab onto. This can wear out a new t-belt alto quicker than a good set of original gears. The diameter of the gear will still be less than the original spec. This will effect timing for the 16V engines and everything else that depends on it. All I’m saying is that if there is an option to get a good set of used gears as opposed to re coating the old ones, go with the good used. Dozman has a set.

AO

If you are recoating gears that are pitted into the magnesium/aluminum, I agree, but if just the anodization (sp?) has worn off without comprimising the gear, then I think it should be safe. Big Dave has been running them for a year now.

Imo000

Ok, good point and I agree. I was under the impression that these gears were also worn down.

heinrich

Calm down Andrew ... Imo's a pretty good guy .... DAMN those look bad. I'm so happy it wasn't mine, and I guess now we know they're magnesium alloy .... I had missed the thread.

Big Dave

I wouldn't use "worn" gears either. If the gears have any pitting or cupping showing that metal has been eroded, they're ruined. The gears I had re-coated had no physical deformation. The original coating had worn off, but the shape of the teeth was the same. Re-coating just replaces the missing factory finish (so to speak).

ALL used gears are going to have SOME loss of the original protective coating.

In this picture, the gear on the left is deformed and should NOT be used again. The one on the right is a used gear and you can see that the coating is partially gone. The one on the right, in my opinion, would be made safer by being re-coated. It's not an expensive process. The problem right now seems to be finding someone willing to do the job, and do it correctly.

AO

I tried to get Kilbot to use them as ultra-lightweight gears, but he wouldn't bite! LOL!