non-rebuildable block?

fireguy50 · 04-16-2007, 10:56 PM

March 2002 I got a cheep rebuilt 5.8L short block pushed 0.060 (F0AE non-roller block w/ cast pistons)
May 2005 the GT40P incorrect valve springs killed the cam / lifters.
14 Lifters came out no problem, while 2 of them had mushroomed and were pried out.
I left the cylinder heads on, and didn’t touch the rotating assembly. Reassembled with link bar roller lifters and cam.

I’ve had low oil pressure after the roller cam install. I’m guessing metal shavings weren’t completely flushed out and have affected the main bearings. I’ve also heard those 2 lifter bores could be screwed and are losing pressure as well. I use 15-40 oil to get 50PSI cold 25-30 warm.

Now that it’s getting warmer outside, I’ll see 15PSI after a full throttle run spikes the coolant to 190F with on the 180 thermostat. I need to start planning the fix now, while I’m saving money.

Could those 2 lifter bores be scared making this block non-rebuildable?
I already have the link-bar lifters so I don’t need a F4TE block.

QWKSNKE · 04-17-2007, 04:54 AM

I think its possible that the 2 lifter holes in question could be out of round and causing low oil pressure.

Before buying a new block I would tear that one down and have EVERYTHING inspected by either you or a good machinist

Italian LX · 04-17-2007, 05:06 AM

Quote:

Originally Posted by fireguy50

Now that it’s getting warmer outside, I’ll see 15PSI after a full throttle run spikes the coolant to 190F with on the 180 thermostat.

Is that 15psi at idle?

What kind of cooling fan are you using?

NightHawk756 · 04-17-2007, 08:39 AM

Quote:

Originally Posted by QWKSNKE

Before buying a new block I would tear that one down and have EVERYTHING inspected by either you or a good machinist

+1!

coupe · 04-17-2007, 08:43 AM

Put 20W-50 oil in it and run it till it won't run any more.

I think (as Lee said) it is those two lifter bores. That is not a priority main oiling system so it would definitely make sense that those lifter bores could be causing oil to get by. But if it is 15psi at idle on a hot day and you run a 10W-30 or something like that, I really think you're okay to go up on viscosity. Does the pressure rise with a little RPM??

fireguy50 · 04-17-2007, 11:26 PM

Italian LX · 04-18-2007, 05:11 AM

There's your problem... the cam wiped the rollers clean off!!!

Dale McPeters · 04-21-2007, 03:55 PM

Dang Ryan I can see that you use camshafts with no lobes on them.....

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04-16-2007, 10:56 PM	#1
fireguy50 Senior Member Join Date: Sep 2005 Location: MI Mental Health Dept Posts: 182	non-rebuildable block? March 2002 I got a cheep rebuilt 5.8L short block pushed 0.060 (F0AE non-roller block w/ cast pistons) May 2005 the GT40P incorrect valve springs killed the cam / lifters. 14 Lifters came out no problem, while 2 of them had mushroomed and were pried out. I left the cylinder heads on, and didn’t touch the rotating assembly. Reassembled with link bar roller lifters and cam. I’ve had low oil pressure after the roller cam install. I’m guessing metal shavings weren’t completely flushed out and have affected the main bearings. I’ve also heard those 2 lifter bores could be screwed and are losing pressure as well. I use 15-40 oil to get 50PSI cold 25-30 warm. Now that it’s getting warmer outside, I’ll see 15PSI after a full throttle run spikes the coolant to 190F with on the 180 thermostat. I need to start planning the fix now, while I’m saving money. Could those 2 lifter bores be scared making this block non-rebuildable? I already have the link-bar lifters so I don’t need a F4TE block. __________________ Ryan J McCormick Parts replacement is not auto repair, if you can't diagnose, don't open the hood! Last edited by fireguy50; 04-16-2007 at 11:00 PM.

04-17-2007, 08:43 AM	#5
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	Put 20W-50 oil in it and run it till it won't run any more. I think (as Lee said) it is those two lifter bores. That is not a priority main oiling system so it would definitely make sense that those lifter bores could be causing oil to get by. But if it is 15psi at idle on a hot day and you run a 10W-30 or something like that, I really think you're okay to go up on viscosity. Does the pressure rise with a little RPM?? __________________ " If you can't explain it simply, you don't understand it well enough. " - Albert Einstein

04-17-2007, 11:26 PM	#6
fireguy50 Senior Member Join Date: Sep 2005 Location: MI Mental Health Dept Posts: 182	__________________ Ryan J McCormick Parts replacement is not auto repair, if you can't diagnose, don't open the hood!

04-18-2007, 05:11 AM	#7
Italian LX Daddy x4 ...we're done Join Date: Dec 2004 Location: Oxford, AL Posts: 11,551	There's your problem... the cam wiped the rollers clean off!!! __________________ -Brian '86 Mustang GT Convertible '88 Mustang LX coupe '11 Odyssey TE '21 Insight Touring

04-17-2007, 04:54 AM	#2
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	I think its possible that the 2 lifter holes in question could be out of round and causing low oil pressure. Before buying a new block I would tear that one down and have EVERYTHING inspected by either you or a good machinist

04-21-2007, 03:55 PM	#8
Dale McPeters 5.0 Block/Walnut Cracker Join Date: May 2005 Location: Working.... Posts: 2,409	Dang Ryan I can see that you use camshafts with no lobes on them..... __________________ '14 Dodge Challenger SRT8 392 6-speed