High Performance Big Block Cadillacs
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Author Topic: Coolant in Oil Sucks!  (Read 19257 times)
online170
C2
**
Posts: 58


« on: October 31, 2011, 10:36:43 AM »

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« Last Edit: August 29, 2017, 06:19:15 PM by online170 » Logged
~JM~
Shop Keeper
C5
*****
Posts: 1853


« Reply #1 on: October 31, 2011, 11:38:42 AM »

Sorry to hear about the problems. The process of going through it will make the car your car. Looks like your fortunate enough to have a nice shop & a good working location. Keep plugging away at it & you should have one hell of a fun car when your done.

Good luck
~JM~
Logged

PS. You don't have enough cam. Grin

...Summit has a kit for $99.... Shocked
online170
C2
**
Posts: 58


« Reply #2 on: October 31, 2011, 12:16:18 PM »

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« Last Edit: August 29, 2017, 06:20:48 PM by online170 » Logged
online170
C2
**
Posts: 58


« Reply #3 on: November 10, 2011, 10:19:08 AM »

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« Last Edit: August 29, 2017, 06:19:28 PM by online170 » Logged
MTS Marty
C4
****
Posts: 282


« Reply #4 on: November 10, 2011, 04:38:42 PM »

three keyway grooves
square top keyway box on crank gear to dot on cam
round top keyway circle on crank to dot on cam
roof top keyway triangle on crank gear to dot on cam

CRANK KEYWAY is ALWAYS at 7:00 - many people scew this up

The way it is set up has the cam 4* retarded
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online170
C2
**
Posts: 58


« Reply #5 on: November 10, 2011, 05:35:43 PM »

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« Last Edit: August 29, 2017, 06:20:59 PM by online170 » Logged
online170
C2
**
Posts: 58


« Reply #6 on: November 12, 2011, 09:34:32 PM »

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« Last Edit: August 29, 2017, 06:19:38 PM by online170 » Logged
online170
C2
**
Posts: 58


« Reply #7 on: November 12, 2011, 09:47:56 PM »

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« Last Edit: August 29, 2017, 06:19:49 PM by online170 » Logged
~JM~
Shop Keeper
C5
*****
Posts: 1853


« Reply #8 on: November 13, 2011, 11:57:57 AM »

Whew!! You're getting into her now. That one cam lobe looks like it was built up with weld material then ground. Unfortunately there was a void in the weld material that the grinding exposed. I have seen this on a few Flat Head engine performance camshafts. I think it will just act as a small lube reservoir. I believe your pistons are what is commonly referred to as "Binocular Pistons" due to the shape of the recess.

Keep up the good work, it will pay off in the end.

~JM~
Logged

PS. You don't have enough cam. Grin

...Summit has a kit for $99.... Shocked
dave brode
C5
*****
Posts: 1074


Best of 11.66, 113.96, 1.59 sixty


« Reply #9 on: November 13, 2011, 12:07:46 PM »

Really neat car!

Sorry to see the ugly, but at least it didn't scatter.

My 2 cents worth:

Green antifreeze is hateful on bearings. If the crank was rubbing something, it may've also been full of fine grit.

It could have been detonating too, which will knock the mains out fast. How much timing were you running? Are you 100% sure that the timing tab is correct? There are several different tabs from various years etc.

The cam is junk. I had a Howard's do the same thing on several lobes, and the lifters looked perfect, which tells me it was a core problem.

Since you may want to buy pistons, you could round up a 500 crank and make it a 500 while you are at it. Esp if the 472 crank is cut up. The only issue with a 500 crank swap would be if it's a 68/69 block, w/o notches at the bottom of bores for the 500 arm.

Many of us are running pitted timing covers. You can fill the pits with epoxy, etc, or just carefully install with a LITTLE rtv on both sides of gasket
[not the globs shown in your pics].i

Don't give up.

Dave

p.s. - are any of the pistons tight on their pins?
« Last Edit: November 13, 2011, 12:12:11 PM by dave brode » Logged

3960 lb '71 C-10. 11.7-1 CR 514". PEP I beam rods floating MTS 18cc dish Probes, Elgin solid cam, home ported heads, MTS 2.19/1.84", Potter/Probe shaft rockers, edel 2115, 4781 850. Switch-pitch TH400, 12" 1800/3200 Tri-Shield convertor, 4.30 gears. Best so far of 11.66, 114.8 mph and 1.59 sixty
online170
C2
**
Posts: 58


« Reply #10 on: November 13, 2011, 07:21:57 PM »

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« Last Edit: August 29, 2017, 06:20:14 PM by online170 » Logged
online170
C2
**
Posts: 58


« Reply #11 on: November 13, 2011, 07:29:07 PM »

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« Last Edit: August 29, 2017, 06:20:24 PM by online170 » Logged
online170
C2
**
Posts: 58


« Reply #12 on: November 13, 2011, 07:47:48 PM »

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« Last Edit: August 29, 2017, 06:20:34 PM by online170 » Logged
dave brode
C5
*****
Posts: 1074


Best of 11.66, 113.96, 1.59 sixty


« Reply #13 on: November 13, 2011, 08:32:50 PM »

Howdy,

Understood that you didn't build it. Sorry, I didn't realize that the rtv was from you trying to doctor it up in the car. I hate the stuff, ends up in the oil pump screen.

Assuming it has 76cc heads, it would be well over 9-1 with those pistons, even with no deck or head cut - 87 not to smart of him.

The complete engine shown in the pic has an EGR, making it '73 ish up. You could measure the stroke with a wire through the plug hole, or pull the pan and post the crank casting number, as well as the head casting #s. We can figure out what it is.

The main caps should need nothing to accept the flat girdle. Maybe a little pass with a file to remove burrs from the bolts. I'll assume that the heads on the 472 are 76cc. You could buy pistons for the 500 that would work with those for whatever compression ratio desired. Just a thought.

Forged rods are nice, but plenty of guys have made pretty good power with prepped stock rods. Piston options start at $400 ish for cast ['70 replacements]. $550 ish for forged, iirc. Nopte sure that there are many options for a forged dished 472 piston for pump gas. Many more piston options for 500.

On the cam - junk due to the chunks missing. I hate to make excuses for the grinders, but it seems that they are at the mercy of the cam core suppliers, which appear to have supplied many that were soft.

On the early block, you can see it has no notches at the bottom of the bores, whereas all '70 and newer 472/500 blocks do. They used the same block for 472 and 500 from '70 up. Any # ...5200 block will accept a 500 crank. the early block must have notches ground to clear the rods with a longer stroke 500 crank. Pia to do.

On the pistons, I'm not well read on 472s, but the ones with the big arrows look factory. The L2344 looks like a replacement. I would be leery of the rest of them, since it may've been rattled hard.

Dave
« Last Edit: November 13, 2011, 08:38:40 PM by dave brode » Logged

3960 lb '71 C-10. 11.7-1 CR 514". PEP I beam rods floating MTS 18cc dish Probes, Elgin solid cam, home ported heads, MTS 2.19/1.84", Potter/Probe shaft rockers, edel 2115, 4781 850. Switch-pitch TH400, 12" 1800/3200 Tri-Shield convertor, 4.30 gears. Best so far of 11.66, 114.8 mph and 1.59 sixty
online170
C2
**
Posts: 58


« Reply #14 on: November 13, 2011, 08:59:57 PM »

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« Last Edit: August 29, 2017, 06:21:10 PM by online170 » Logged
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