Search found 35 matches
- Wed Mar 07, 2018 6:10 am
- Forum: Ask your Mechanical Questions here
- Topic: Repo Speed-O Drive Grease Cap Problems
- Replies: 17
- Views: 1180
Re: Clark's Repo Speed-O Drive Grease Cap Problems
I would first contact Clarks for a replacement if you feel the part is defective. If you just want to experiment, you might try heating the plastic gently and then compress it slightly around a square stick sized to simulate the speedo drive cable end. Also make sure the cable is not too tight in t...
- Wed Feb 07, 2018 4:06 am
- Forum: Corvair Talk
- Topic: Air Head II
- Replies: 4
- Views: 668
Re: Air Head II
https://encrypted-tbn2.gstatic.com/shopping?q=tbn:ANd9GcR4W44z5O2e9b-w2zJdRVYj758i0Q1qub8UipQBBudT1CM5PFPoydA_1xdWN8W-2RaxYyynXEJA&usqp=CAc http://corvaircenter.com/images/Corvair-Center.gif http://corvaircenter.com/phorum/read.php?1,839374 :think: Click on the link below for a list of numerous...
- Fri Feb 02, 2018 7:55 am
- Forum: Corvair Talk
- Topic: Air Head II
- Replies: 4
- Views: 668
Re: Air Head II
I was installing weaker springs to measure pushrods, when I put compressed air to hold valves closed there was air leaking out intake and exhaust not much but I would expect that if the valves were seating properly there should be no leaks so back to shop they went. Both heads got relapped, again s...
- Fri Feb 02, 2018 5:37 am
- Forum: Corvair Talk
- Topic: Air Head II
- Replies: 4
- Views: 668
Air Head II
I was installing weaker springs to measure pushrods, when I put compressed air to hold valves closed there was air leaking out intake and exhaust not much but I would expect that if the valves were seating properly there should be no leaks so back to shop they went. Both heads got relapped, again sa...
- Wed Jan 31, 2018 3:33 pm
- Forum: Ask your Mechanical Questions here
- Topic: Air Head - Not Sure How to Title This One
- Replies: 20
- Views: 1361
Re: Air Head - Not Sure How to Title This One
Heads went back to the shop. I'll let y'all know what the problem was. Sent from my [device_name] using Corvair Forum mobile app Heads came back, mineral spirits leak down revealed a few leaks, not sure what went wrong. Found a leak down gauge. #1 @ 20% others around 13% I'm going to go ahead and r...
- Wed Jan 31, 2018 4:13 am
- Forum: Ask your Mechanical Questions here
- Topic: Air Head - Not Sure How to Title This One
- Replies: 20
- Views: 1361
Re: Air Head - Not Sure How to Title This One
Heads went back to the shop. I'll let y'all know what the problem was.
Sent from my [device_name] using Corvair Forum mobile app
Sent from my [device_name] using Corvair Forum mobile app
- Tue Jan 30, 2018 5:54 am
- Forum: Ask your Mechanical Questions here
- Topic: Air Head - Not Sure How to Title This One
- Replies: 20
- Views: 1361
Re: Air Head - Not Sure How to Title This One
I'm not sure what is meant by a "valve job. In the old days it was just lapping the valves and seats. Anything short of new deep valve seats, new valves, and new guides is not acceptable on these old 140HP heads. Worn valve guides will result in poor valve seating due to alignment problems. Th...
- Tue Jan 30, 2018 3:21 am
- Forum: Ask your Mechanical Questions here
- Topic: Air Head - Not Sure How to Title This One
- Replies: 20
- Views: 1361
Re: Air Head - Not Sure How to Title This One
I'm not sure what is meant by a "valve job. In the old days it was just lapping the valves and seats. Anything short of new deep valve seats, new valves, and new guides is not acceptable on these old 140HP heads. Worn valve guides will result in poor valve seating due to alignment problems. Th...
- Mon Jan 29, 2018 7:42 pm
- Forum: Ask your Mechanical Questions here
- Topic: Air Head - Not Sure How to Title This One
- Replies: 20
- Views: 1361
Re: Air Head - Not Sure How to Title This One
From Clark's, used heads, everything is new, only have half the engine reassembled so far away, and only one pair of springs was removed. I'm using Otto performance springs. Not sure what a leak down test is. I put some air in to hold valves closed to do the spring change for the pushrod length calc...
- Mon Jan 29, 2018 6:49 pm
- Forum: Ask your Mechanical Questions here
- Topic: Air Head - Not Sure How to Title This One
- Replies: 20
- Views: 1361
Re: Air Head - Not Sure How to Title This One
In my defense and not to be a Richard Cranium I did say all all I did was install "weak" springs, don't have pushrods yet
Sent from my [device_name] using Corvair Forum mobile app
Sent from my [device_name] using Corvair Forum mobile app
- Mon Jan 29, 2018 6:43 pm
- Forum: Ask your Mechanical Questions here
- Topic: Air Head - Not Sure How to Title This One
- Replies: 20
- Views: 1361
- Mon Jan 29, 2018 6:42 pm
- Forum: Ask your Mechanical Questions here
- Topic: Air Head - Not Sure How to Title This One
- Replies: 20
- Views: 1361
Re: Air Head - Not Sure How to Title This One
Is it possible in your new setup that somehow every valve adjustment is too tight — causing all valves to remain open slightly even at the bottom of the cam lobe? Not necessarily a leaky valve and seat but a valve that is not closing completely. :dontknow: I have no push rods installed yet I guess ...
- Mon Jan 29, 2018 5:33 pm
- Forum: Ask your Mechanical Questions here
- Topic: Air Head - Not Sure How to Title This One
- Replies: 20
- Views: 1361
Re: Air Head - Not Sure How to Title This One
Something odd is going on. I can't believe every valve and seat in both heads has an issue.
Sent from my [device_name] using Corvair Forum mobile app
Sent from my [device_name] using Corvair Forum mobile app
- Mon Jan 29, 2018 5:30 pm
- Forum: Ask your Mechanical Questions here
- Topic: Air Head - Not Sure How to Title This One
- Replies: 20
- Views: 1361
Re: Air Head - Not Sure How to Title This One
OT-10 cam Roller rockers Hydraulic lifters .052 head gaskets .015 base gaskets Stock 140hp heads Yes hold closed, ty for the correction All that is irrelevant, the question is how can they be leaking air both intake and exhaust on all cylinders of both heads. I could see it if I had done a half ass ...
- Mon Jan 29, 2018 1:49 pm
- Forum: Ask your Mechanical Questions here
- Topic: Air Head - Not Sure How to Title This One
- Replies: 20
- Views: 1361
Re: Air Head - Not Sure How to Title This One
Sorry about the typos and lack of punctuation
Sent from my [device_name] using Corvair Forum mobile app
Sent from my [device_name] using Corvair Forum mobile app
- Mon Jan 29, 2018 1:46 pm
- Forum: Ask your Mechanical Questions here
- Topic: Air Head - Not Sure How to Title This One
- Replies: 20
- Views: 1361
Air Head - Not Sure How to Title This One
Was determining pushrod length today and when I pressurized the cylinder with air to hold the valves open while I installed the check Springs I think they're called I noticed leakage out the exhaust tube called my machine assist he said bring them back and he went through and resurface the seats and...