Search found 157 matches

by Schurkey
Thu Jan 19, 2023 10:22 am
Forum: Technical Talk
Topic: Distributor Advance Discussion
Replies: 2
Views: 3668

Re: Distributor Advance Discussion

The stock advance specs should be in the Genuine GM service manual for your vehicle. The OEM vacuum advance canisters had the amount of advance stamped-into the bracket. HEI_VacuumAdvance1asm.jpg Bear in mind that the stock advance curve for the centrifugal and vacuum advance may not be optimum for ...
by Schurkey
Fri May 27, 2022 12:45 am
Forum: Technical Talk
Topic: Oil Restricters
Replies: 5
Views: 7719

Re: Oil Restricters

I installed Mondello's oil restrictors in a 455 that I built for my 1972 442. I understand that in Olds engines, more than sufficient oil is fed to the lifters while the front main bearing may not receive sufficient lubrication in extreme conditions. These restrictors force more of the oil and pres...
by Schurkey
Wed Feb 23, 2022 11:51 pm
Forum: For Sale: Parts
Topic: Polyurethane front control arm bushing inserts
Replies: 8
Views: 27912

Re: Polyurethane front control arm bushing inserts

---Sold Out!---

If there's enough demand, I might have another production run made. However, the price would be higher.
by Schurkey
Wed Oct 13, 2021 2:20 pm
Forum: Technical Talk
Topic: Toronado Intake Manifold Exhaust Crossover Problem
Replies: 10
Views: 16184

Re: Toronado Intake Manifold Exhaust Crossover Problem

1. Now that you've blocked the crossover passage in the intake manifold, you need to assure that the heat-riser valve on the exhaust manifold can never close. If the heat riser valve closes, you'll have an extremely restricted exhaust on one bank, with attendant poor performance. 2. Shoulda painted ...
by Schurkey
Sun Aug 01, 2021 4:24 pm
Forum: Technical Talk
Topic: Head Gasket Replacement
Replies: 98
Views: 153864

Re: Head Gasket Replacement

With new lifters and using the old camshaft, should I apply assembly lube on the top of the camshaft as well? Yes. I tried to remove the gunk that was on it, Is this camshaft fit for re-use? Lobes not worn? If the taper is gone on any one of the sixteen lobes, it's junk. With new lifters, do I need...
by Schurkey
Tue Jul 27, 2021 2:56 pm
Forum: Technical Talk
Topic: Head Gasket Replacement
Replies: 98
Views: 153864

Re: Head Gasket Replacement

Milling the head to gain back compression ratio is only 1/2 the solution. A. The real compression ratio was lower than what Oldsmobile advertised to begin with. B. Milling the head does nothing to reduce the piston-to-head distance screwed-up by the double-thick head gasket. C. Excessive piston-to-h...
by Schurkey
Mon Jul 26, 2021 6:33 pm
Forum: Technical Talk
Topic: Head Gasket Replacement
Replies: 98
Views: 153864

Re: Head Gasket Replacement

Valve seats work-harden in use. An engine starts it's life on leaded gasoline. The lead helps preserve the seats until they work-harden. The engine can then be switched to unleaded gasoline and probably not have a problem with valve recession/seat wear. Then someone grinds the seats, removing the wo...
by Schurkey
Thu Jul 15, 2021 4:51 pm
Forum: Technical Talk
Topic: Fan Clutch
Replies: 48
Views: 82414

Re: Fan Clutch

So upping the temperature for the thermostat didn’t do much, I pushed it quite hard on an incline (84 degrees today) and it went up to 233 degrees. Once I started going downhill, the temperature immediately started to drop a few seconds in the descent (dropped 10 degrees within 30 seconds and 20 in...
by Schurkey
Tue Jun 29, 2021 8:38 pm
Forum: Technical Talk
Topic: Fan Clutch
Replies: 48
Views: 82414

Re: Fan Clutch

I just opened the vent on the radiator cap and coolant and air went into the overflow tank. So does that mean that there’s still air in the system? The cap is rated at 16 psi. Some possibilities: 1. Residual air from the recent cooling system work. 2. Combustion chamber pressure leaking from the cy...
by Schurkey
Mon Apr 05, 2021 12:19 pm
Forum: Technical Talk
Topic: Fan Clutch
Replies: 48
Views: 82414

Re: Fan Clutch

Here's an explanation with diagrams: https://www.coolcatcorp.com/Radiator%20Caps/Radiatorcaps.html Wow! That was entirely NOT what I was expecting to see. I learn something every day. Went on the NAPA and O'Reillys web sites looking for photos of what I was trying to explain; but I found no suitabl...

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