'64 has knock and smoking

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larry
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Re: '64 has knock and smoking

Post by larry »

The interference I had was the push rod tubes. But easily get around those.
The tubes are in enough that I can tighten down clamps on cast manifold. But clams not as centered on manifold as in the other head.

I’ll look at interference in head boats.
larry
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Joined: Fri Mar 16, 2018 11:20 am

Re: '64 has knock and smoking

Post by larry »

Under car looking up. Can’t tell about interference with head bolts.

Guess I’ll pull the tubes out and look for marks from interference with head bolts.

Last resort next - Guess I’ll pull that head and put tubes in with a press.
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terribleted
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Re: '64 has knock and smoking

Post by terribleted »

Generally not necessary to use a press. are you sure there is not a burr or something blocking the tubes progress. You might try pulling it back out and seeing if you can remove any such burrs. Is this the head that had the disintegrated guide and if so was that guide in the same area of the head where you are having the issue? I think you said welding was done to the head. There could be some weld or spatter stuck in and inopportune spot?
Corvair guy since 1982. I have personally restored at least 20 Vairs, many of them restored ground up.
Currently working full time repairing Corvairs and restoring old cars.
https://www.facebook.com/tedsautorestoration/

Located in Snellville, Georgia
larry
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Joined: Fri Mar 16, 2018 11:20 am

Re: '64 has knock and smoking

Post by larry »

Pulled the tubes out. Came out easier than expected. Exhaust residue on two. But all three had mark where hitting head bolts, half way between end and indented section.

Froze tubes to see if I could slip them by the head bolts. Did not work. So planning to pull that head. Bolts have not been out of block so likely less risky to pull the head.

Appears there is not enough space to pull head while still in car. So will drop engine first.
larry
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Re: '64 has knock and smoking

Post by larry »

Also, no burrs and all 3 appear round - no damage.

This is not the head with exploded guide.
But it was machined. All three tubes not clearing the head bolts. But I’ll inspect head closely.

Tubes stayed in the other head. I just did not know tubes would not clear in-place head bolts.
Another lesson learned.
larry
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Re: '64 has knock and smoking

Post by larry »

Thx for the guidance - a real learning experiece.

Fun challenge but very different from other engines I’ve worked.
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terribleted
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Re: '64 has knock and smoking

Post by terribleted »

You can take the heads off without totally removing the engine. The rear must be lowered some and removal of the long carb stud is advised, but to just pull one head. I would certainly not pull the entire engine. I would remove the necessary shrouding and the carb stud and pull that puppy off:)
Corvair guy since 1982. I have personally restored at least 20 Vairs, many of them restored ground up.
Currently working full time repairing Corvairs and restoring old cars.
https://www.facebook.com/tedsautorestoration/

Located in Snellville, Georgia
larry
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Joined: Fri Mar 16, 2018 11:20 am

Re: '64 has knock and smoking

Post by larry »

Delayed but here is an update from several days ago:

After looking at removing head while In the car, decided to pull engine. (Glad I did - much easier to work on out.)

After pull, it was much easier to pull that head. The exhaust tubes went on super easy (frozen).

Engine back in the car and sounds great.
Thanks for the insight.
larry
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Re: '64 has knock and smoking

Post by larry »

Continuing:
(several other project distractions lately)

New issue (well, next layer)
Four-speed transmission getting stuck in 2nd gear. Not sure why. My guess is synchronizer or shifter linkage adjustment.

Any insight greatly appreciated.

One point- shifter linkage was badly worn at fork on transmission end, so replaced with one from ‘62 donor car. Appears to lineup but not sure of length adjustment. Still concerned it may be synchronizer.
joelsplace
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Re: '64 has knock and smoking

Post by joelsplace »

Need more details. Is it now permanently in 2nd since you changed the coupler? Does the shifter move?
157 Corvairs, 5 Ultravans and counting
Northlake, TX
larry
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Joined: Fri Mar 16, 2018 11:20 am

Re: '64 has knock and smoking

Post by larry »

Once it locks in 2nd, I have to go into transmission side-plate and by hand move rear gear-fork toward rear of car. Lever will not pull it out of gear. Even removing linkage I can’t pull transmission out of gear.

Once unlocked, shifts correctly reverse or first. Have not tried third. (Or fourth). Car not driven on road yet, to try third or fourth.

Lockup occurs setting still moving through the gears.

I suspect there is one or more bushings worn out. Maybe synchronizer.
joelsplace
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Re: '64 has knock and smoking

Post by joelsplace »

Does it move fairly easily inside the transmission? If so, the interlocks may be messed up.
157 Corvairs, 5 Ultravans and counting
Northlake, TX
larry
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Re: '64 has knock and smoking

Post by larry »

Yes. Fairly easy once I identified what to move.
joelsplace
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Re: '64 has knock and smoking

Post by joelsplace »

If it was a synchro issue it would be stuck there also.
157 Corvairs, 5 Ultravans and counting
Northlake, TX
larry
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Re: '64 has knock and smoking

Post by larry »

Can the interlocks be worked on without taking transmission apart?
joelsplace
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Re: '64 has knock and smoking

Post by joelsplace »

No but some of the detents are externally accessible. I would start with those. Check out a diagram.
The interlocks are between the shift shafts and one shaft has to come out to access them.
You could also take the shift tube loose at the transmission and use something like an alignment punch through the hole in the main shift shaft to shift the transmission with the cover off and see if there is a visible problem like a shift fork roll pin coming out.
157 Corvairs, 5 Ultravans and counting
Northlake, TX
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