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#101
12-02-2017, 02:48 PM
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That Distributor gear looks very worn, change that for sure.
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1968 Firebird 400 RAII M21, 3.31 12 bolt, Mayfair Maize. 1977 Trans Am W72 400, TH350, 3.23 T Top Everyone you will ever meet knows something you don't. Bill Nye. |
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#102
12-02-2017, 03:12 PM
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Not worn...Ate up
Quote:
A thin sliver milled off the gear, would have been just right to hang the oil pressure relief ball open. Clay
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All the federales say,they could've had him any day They only let him slip away, out of kindness...I suppose Poncho & Lefty |
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#103
12-02-2017, 03:12 PM
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Close that engine back up and pressure wash/brush it, greatly helps eliminate contamination from "Qatar" sand/grit in your American engine.
Last edited by STEELCITYFIREBIRD; 12-02-2017 at 03:33 PM. |
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#104
12-03-2017, 07:44 AM
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I would rig up a way to use the old pump bolted to the motor to suck up paint thinner and pump it thru the motor to clean out the oil passages !
You had a lot of metal grit go thru the motor and if you have any sludge sitting in the two horizontal running galleys then you may still have crap in there that can / will come out and eat up your new bearings in short order, no less effect Cam and lifter break in! You have come too far to not do everything in power to get things as right as you can now!!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#105
12-03-2017, 09:23 AM
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What do the rod bearings look like? Those will be in bad shape if lack of oil. Me think your main bearing problem is due to something else.
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#106
12-03-2017, 09:39 AM
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I'm wondering if the bearing wear isn't even as simple as some grit or something under a cap making it sit a bit crooked. I'll also be ordering a dial indicator so I can check the straightness of the crank... Sam
__________________
-- Sam Agnew Where you come from is gone; where you thought you were going to, weren't never there; and where you are ain't no good unless you can get away from it. Ministry - Jesus Built My Hotrod |
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#107
12-03-2017, 09:57 AM
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Uneven bearing wear is good indication that saddle alignment is off and requires main line bore/hone, especially when new hardware is used. If engine is all stock and never been machined then it say's a lot for a 46 year old engine. If you got metal thru out the engine then it has to come apart and be cleaned properly . Jeff
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Carburetor building & modification services Servicing the Pontiac community over 20 years |
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#108
12-03-2017, 10:10 AM
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No need to take off the heads or remove the pistons to check the rod bearings, at this point.
Back off the rockers, flip the engine and check a few rods at a time. Protect the rod bolts from hitting the crank. No need to change the piston rings either?? The further you pull apart, the harder it will be to get back together in your location, IMO. |
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#109
12-03-2017, 10:18 AM
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Sandblasted come to my mind. |
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#110
12-04-2017, 07:10 AM
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Not just possibly grit under the main bearing can throw off bearing alinement , but just a oil film under the Bearing shell will do it!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#111
01-18-2018, 12:57 AM
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Sooooo. Any updates?
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#112
01-18-2018, 02:20 AM
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I think the Christmas New Years period is busy for everyone. For me I was busy with various family things for the past month. It is only this week that I have been able to get any work done. And by any work I pretty much mean taking down the valve train and popping the valley pan. I should hopefully get the heads off and the crank free this weekend depending on commitments.
The good news is I didn't see anything scary in the valvetrain. The Harland Sharps are holding up great, pushrods still seem straight. Shame about the cam gear because all the lobes seem fine and the lifters are nice and smooth. All the pushrods have been spinning well. One thing I found curious is that I can see what the grit has done to the bearings and I can see the scuffing in the bores but I don't see any gritty pieces or "sand" or "mud" in the head and valley areas. All the pooled oil looks clear of sediment. I guess I will discover more as I go.
__________________
-- Sam Agnew Where you come from is gone; where you thought you were going to, weren't never there; and where you are ain't no good unless you can get away from it. Ministry - Jesus Built My Hotrod |
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#113
01-18-2018, 07:09 AM
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The under the valve cover area of your heads are painted like I do when I rebuild heads.
Did your motor and or car come from N.C by any chance?
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#114
01-18-2018, 08:03 AM
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Quote:
Sam
__________________
-- Sam Agnew Where you come from is gone; where you thought you were going to, weren't never there; and where you are ain't no good unless you can get away from it. Ministry - Jesus Built My Hotrod |
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#115
01-18-2018, 08:22 AM
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30 years Sam.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#116
01-18-2018, 08:38 AM
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Quote:
If it helps, this engine was pretty original as received by me. 3/8 studs with factory rockers, iron water pump, stock type timing chain (although since I never saw any nylon I'm guessing replaced at least once), stock type fuel pump, QuadraJet with a serial number that put it as a 1972 carb... Sam
__________________
-- Sam Agnew Where you come from is gone; where you thought you were going to, weren't never there; and where you are ain't no good unless you can get away from it. Ministry - Jesus Built My Hotrod |
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#117
01-18-2018, 08:53 AM
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Look for stampings on the ends of the heads .
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#118
01-18-2018, 06:57 PM
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Well, as expected, more became clear with the heads off. First thing's first, it all looks pretty good for the most part from what I can see. The engine has been rebuilt at least once. The pistons clearly say 030 on them so it's been bored once. And the deck seems to have been zero'd for the pistons or pretty damn close.
__________________
-- Sam Agnew Where you come from is gone; where you thought you were going to, weren't never there; and where you are ain't no good unless you can get away from it. Ministry - Jesus Built My Hotrod |
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#119
01-18-2018, 07:01 PM
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Pistons and chambers look pretty good to me. Some carbon which I figure is at pretty normal levels. White exhaust valves which I'm pretty sure indicates decent combustion.
__________________
-- Sam Agnew Where you come from is gone; where you thought you were going to, weren't never there; and where you are ain't no good unless you can get away from it. Ministry - Jesus Built My Hotrod |
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#120
01-18-2018, 07:10 PM
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Looks like not the stock 068 cam either. Something on a "CMC" (is that Comp Cams?) blank. Which doesn't mean it is from them I guess. Got nothing googling the SP07 and 931167 numbers on there. I did my best with the vernier caliper I have and got something like .375 and .422 lift. Those are bound to be a little off but it at least shows that the exhaust and intake lift are different - not a feature of a stock or even "clone" grind.
__________________
-- Sam Agnew Where you come from is gone; where you thought you were going to, weren't never there; and where you are ain't no good unless you can get away from it. Ministry - Jesus Built My Hotrod |
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