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2 months ago
donm
I agree that modern S oils do not provide sufficient protection for flat tappet engines, although some oil manufacturers say they are fine as long as the engine is broken in. The point I was trying to make is that in the post, the C designation is not explained. People should know that it refers to compression ignition ie diesel engines. Some sources recommend that C oil not be used in a gas e
Forum: Corvair Center Forum
2 months ago
donm
Nowhere in the link you provide does it state that diesel engine oil is being recommended. I think people should be made aware of that so they can make an informed choice. Here's a portion of the website I listed in a previous post.
Forum: Corvair Center Forum
2 months ago
donm
I did and it doesn't make sense to me. I guess I'm not getting it. A modern diesel engine is about as far from a 60 yo Corvair engine as you can get. Why not use an oil formulated for an engine similar to a Corvair engine like an aviation engine? Air cooled, boxer four or six, overheard valve, flat tappet, mechanical fuel injection and some are turbocharged. Sounds a lot more like a
Forum: Corvair Center Forum
2 months ago
donm
I know that diesel C-spec oil has been used by some in older flat tappet gas engines as it is thought to provide better protection for the cam and lifters. I wouldn’t use modern S-spec oil in a 60 year old flat tappet engine as the oil is formulated for modern gas engines with roller lifters and catalytic converters. I think it would be better to use an S-pec oil with higher ZDDP content found
Forum: Corvair Center Forum
2 months ago
donm
See link for a better explanation.
Forum: Corvair Center Forum
2 months ago
donm
I'm no expert on engine oils, but you might want to check out the API (American Petroleum Institute) spec. I note that it's labeled as a diesel engine oil. Diesel engine oils have an API spec starting with a C denoting compression ignition and spark ignition engines (like Corvair engines) have an API spec starting with an S. The full synthetic diesel engine oil I use in my tractor ha
Forum: Corvair Center Forum
2 months ago
donm
I learned the torch method 50 years ago in autobody class along with body solder (lead) work. Definitely an art to it. I also recently tried the shrinking disc. Eastwood sells one: It's a little easier to control but is also slower. It still requires a lot of skill. Best to practice on an old fender or door that you plan to scrap.
Forum: Corvair Center Forum
2 months ago
donm
You can always make your own
Forum: Corvair Center Forum
2 months ago
donm
I have a 100k BTU sealed combustion propane heater hung from ceiling for my 36 x 60 shop. No windows and 24" fiberglass insulation in attic and have 1/3 of shop partioned off for cold storage (but can open a man-door between the two). Costs about $120/year to run heater and I'm retired and in shop most days. You can see it in photo on left in my signature
Forum: Corvair Center Forum
2 months ago
donm
I just got a quote from Paul's Chrome to plate a radio faceplate. $250 to chrome it and if you want the lettering engraved deeper it's another $100. I decided to polish up what I have. I'm concerned that if you don't engrave it deeper the lettering will look faint and if you engrave it, it may not look original. Anyone done the rechrome with engraving? How did it turn out?
Forum: Corvair Center Forum
2 months ago
donm
Back 45 years ago, I worked for a restoration shop and painted a 1959 Benz with acrylic lacquer. Shop owner decided that he needed more room so a few days after painting, wet sanding and buffing, he bought a cheap clear plastic cover to put over the car and moved it outside were it stayed for a week or so. During that time it was very windy and the movement of the cover by the wind, abraded the
Forum: Corvair Center Forum
2 months ago
donm
Yup, first gen Camaro verts used shakers too.
Forum: Corvair Center Forum
2 months ago
donm
Jay Leno's Garage.
Forum: Corvair Center Forum
2 months ago
donm
In summer of 2019 before things went nuts, HF had a 25% off sale on all blast media so I stocked up on beads and AL oxide. Not sure it that will ever happen again.
Forum: Corvair Center Forum
2 months ago
donm
The guards do look nice. Probably would clean up well for a driver or would be perfect if rechromed. FYI, this summer I paid $30 each for nice used ones.
Forum: Corvair Center Forum
2 months ago
donm
I use glass beads or aluminum oxide blast media from Harbor Freight in my cabinet. Aluminum oxide is a little more aggressive than the glass beads, but the beads leave a nicer finish. FYI, Harbor Freight has been out of the glass beads for the last two months. Not sure if they have them back in stock or not.
Forum: Corvair Center Forum
2 months ago
donm
I agree. Great choice! As a guy who spent 10 years in the 70’s and early 80’s doing autobody repair and restoration in a rustbelt state, I can tell you that it would not have been easy nor inexpensive to repair the damage uncovered by the media blasting. I know its painful now but in the end you will have a much better finished project.
Forum: Corvair Center Forum
3 months ago
donm
I talked to a machinist friend who also suggested thermal spray welding to build up the shaft and then machine it to spec. I think my shaft is a good candidate for the procedure as the worn end still has a 0.003" interference fit (although with high and low spots) and the internal splines are good. I will repost once I find out if it's possible and what the cost is. Thanks, Don
Forum: Corvair Center Forum
3 months ago
donm
Were you able to determine that the shim was damaged without removing the bearing? Are you supposed to pull the bearing and look at the shim even though it looks fine?
Forum: Corvair Center Forum
3 months ago
donm
I agree, the wheel openings have been enlarged.
Forum: Corvair Center Forum
3 months ago
donm
After giving it a little more thought, I think 66vairman is correct and the pinon gear damage is likely due to youthful indiscretion (I was 17&18 YO when I had the Corv8 on the road) rather than the rear impact. The rest of the story: when I built the Crown kit, I purchased the 4-spider diff and installed it in high school shop class. I had the shop manuals, but the school shop had no 1/4&
Forum: Corvair Center Forum
3 months ago
donm
I appreciate all of the responses. Guess I'll have to find me a new shaft. Dang! The internal splines are perfect on it
Forum: Corvair Center Forum
3 months ago
donm
Interesting idea. Yeah, I've heard that the 3.08 can be hard to get a good pattern with. I'll see how it goes with mine. BTW, this car will just be a cruiser, no burnouts or track time and an open diff with moderate size tires.
Forum: Corvair Center Forum
3 months ago
donm
Measuring in several places I get 1.3125" to 1.318" but mostly 1.316". It was pretty tight and seemed like a normal press fit when I pressed it off with my 20 Ton shop press. I still can't believe it spun as it looked perfect before I disassembled it. Good pinion shafts are hard to find and Clark's no longer has the repo they had for a while. I'm thinking that I&#
Forum: Corvair Center Forum
3 months ago
donm
You're right. Just thought it was poor machining, but it has obviously spun and destroyed the shim in the process. Yes I use loctite. Thanks for pointing that out. BTW, before I removed it, the bearing looked and felt perfect. I would not have discovered the problem had the pinion gear not been cracked and needed to be replaced.
Forum: Corvair Center Forum
3 months ago
donm
Here's the pinion shaft. No cracks and the internal splines are perfect so I plan to reuse it with new gear and bearings (both bearings).
Forum: Corvair Center Forum
3 months ago
donm
Too bad the front panel is butchered up so bad. Most guys (me included) open up the area below the bumper and find that it provides sufficient cooling.
Forum: Corvair Center Forum
3 months ago
donm
Pressed off the pinion gear in my '66 diff today and found the shim at the bottom of the photo. The top shim came with the Clark's 3.08 gear I'm installing. The shim that I found is not what I was expecting. Is this typical? It's hard to get a good measurement on it but it's about 0.016" which is about what I was expecting. For a little background on this diff.
Forum: Corvair Center Forum
3 months ago
donm
Crown uses the Corvair trans mount crossmember which is missing in photo. Did Kelmark use the Corvair x-member?
Forum: Corvair Center Forum
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