oil pressure problems/head installation

1558 Views 13 Replies 11 Participants Last post by MauriSSio, Mar 15, 2006

gazzbag

Discussion Starter · Mar 12, 2006

need help.

i have had my 351 2v heads done up for gas,with stainless steel seats etc.i replaced lifters also.apart from that everything is stock standard.i cleaned top of pistons which had very little build up on them.all new gaskets were fitted although there was some confusion with the head gaskets as they were marked "front" where in actual fact one had to be the reverse,so i've been told (?).once i'd assemble the top end i still had rocker noises on the passenger side only and noticed i wasn't getting the full amount of oil pressure.the pressure would rise to 40 psi but after running for about 10 minutes it would drop back to 20 psi and remain there.with a few more revs it slowly went back to 40 psi but it would drop back again.prior to doing the heads i had no oil pressure problems,the pump seems to be working,if it wasn't i don't think i'd be getting any pressure.i've flushed the block with oil just in case the pump had picked up any gunk,this changed nothing.i've let the engine run for 15 - 20 minutes to give the lifters time to pump up but i'm now at a stalemate as to where i've gone wrong.the only thing i can think of is the head gasket being installed the wrong way round,but if that was the case,would the engine run as long as i had it before noticing any problems,or would that even have anything to do with the oil pressure.

your advise or ideas would be greatly appreciated,

thanks

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1 Bad 88 GT

· #2 · Mar 13, 2006

On 2006-03-12 15:29, gazzbag wrote:
i have had my 351 2v heads done up for gas,with stainless steel seats etc

What is this supposed to mean? Done up for gas? Am I missing something? Where did you get stainless seats at?

The word "Front" on the head gasket means exactly that.

BTW why would you change just the lifters?

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71hotrodpinto

· #3 · Mar 13, 2006

As carefull as you may have been you might have dropped something into the pan thats covering the pump under suction.
But yes, i cant see why front doenst mean FRONT.

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dennis112

· #4 · Mar 13, 2006

Did you put front to the rear of the block or put the word front face down, but still to the front of the block?

I've never heard that putting the head gasket on backwards would affect oil pressure. What it does do is increase the engine temperature and cause overheating.

You won't be able to flush the screen when you change oil. I agree with pinto that you may have dropped enough debris to clog the oil pump screen.

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dacofa

· #5 · Mar 13, 2006

Pull the pan. You probably have a bunch of oil flakes that now cover the pickup screen. If you don't do it and get it fixed soon, get ready to replace crank and rod bearings, at the least. You're straving the oiling system fpr oil and all that's going to do is burn things up.

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351ciofgrunt

· #6 · Mar 13, 2006

On 2006-03-12 16:34, 1 Bad 88 GT wrote:
i have had my 351 2v heads done up for gas,with stainless steel seats etc

What is this supposed to mean? Done up for gas? Am I missing something? Where did you get stainless seats at?

Done up for gas as in LPG (Liquid Petroleum Gas) or CNG (Compressed Natural Gas) Not the gas you americans talk about when you mean to say petrol....

lol

_________________

1980 XD Falcon
351c 238/[email protected]
Toploader
9inch 3.5 gears

<font size=-1>[ This Message was edited by: 351ciofgrunt on 3/13/06 10:30am ]</font>

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1 Bad 88 GT

· #7 · Mar 14, 2006

On 2006-03-12 19:26, 351ciofgrunt wrote:
Done up for gas as in LPG (Liquid Petroleum Gas) or CNG (Compressed Natural Gas) Not the gas you americans talk about when you mean to say petrol....

lol

Now that's where it would be useful if people had the common courtesy to list their location that these misunderstandings could be avoided.

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351ciofgrunt

· #8 · Mar 15, 2006

I agree

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igo1090

· #9 · Mar 15, 2006

yes, front means front.

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MauriSSio

· #10 · Mar 15, 2006

but does front mean front facing up or down?or does front mean UP in this case? Or maybe its supposed to face the front of the transmission...........front can be misleading if you think too much...........

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Tracer64

· #11 · Mar 15, 2006

On both gaskets, FRONT is to the front of the motor (water pump ect). You will be able to read FRONT on one and on the other, FRONT will be facing down(towards the ground). You will notice you will be able to see the label tabs(saying front) sticking out on both sides.

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coupe3w

· #12 · Mar 15, 2006

If you are puting Head gaskets on the ENGINE and it says FRONT, why in the world would you think it means front of the transmission? If the Head gasket is on backwards ("FRONT" towards the engine rear, firewall side) it will cause overheating.

_________________

67 Mustang Fastback w/351-C and 5 speed
34 Ford 3 window coupe 5.0 AOD

<font size=-1>[ This Message was edited by: coupe3w on 3/16/06 12:08am ]</font>

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dirtball

· #13 · Mar 15, 2006

What if you thought Front was in refrence to the battle you're having with your car? Then you've got to worry about the Eastern Front or the Western Front. You wouldn't want to wage a war on both fronts at the same time, it's really hard on resources to keep both fronts supplied and defended!

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MauriSSio

· #14 · Mar 15, 2006

LOL

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