New head gasket / Sludge

[GST with PSI]

Let the car sit until it is cold. Start it up, and tell us if the cooling system pressurizes instantly. Grab the upper radiator hose, and see if it is hard to squeeze. You could run a compression test also, looking for a low cylinder. A CLT is an option as well if you have the tools. These tests will check to see if compression is leaking into the cooling system.

Edit: Sorry OP, just noticed you are inquiring about a 420a. The top comments/tests still apply, just disregard what I wrote below this. I'll look around and see how the head on the 420A is feed. I'll leave what I wrote below though, as it may help some 4G63 guys having your issue. Still wan't someone to confirm that there is only the one pressurized oil port between the head and block on a 4G63.

Dale, Tuners, correct me if I'm wrong, but the only pressurized oil port between the block and head is the oil feed port correct? If you had a leak, that's where it would likely be. Aside from pressurizing the cooling system with a tester, I don't know a way you could check to see if there is a leak there. I can't imagine one of the drain ports would be leaking into the cooling system between the head and block?

^^ Thats a 4g63 block. The OP has a 420 a:

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I know man, read where I wrote Edit:

 

[Phantom DSM]

I know man, read where I wrote Edit:

Relax bro, you asked Tuners to correct you , i had already posted it before your edit.

 

[GST with PSI]

Relax bro, you asked Tuners to correct you , i had already posted it before your edit.

No, you didn't? It clearly shows I edited my post where you quoted me, meaning I already edited my post before you replied. You just didn't read it. I wasn't trying to be condescending, I just wanted to point out to the OP I corrected my post, so he wasn't confused.

I was asking for clarification on what oil ports supply pressurized oil to the head on a 4G63. I am confident only the one single oil port pictured above is pressurized, but wanted someone to confirm. According to the oiling diagrams in the FSM, there is only one port, so I want to make sure I'm not missing something.

 

[Spaz5spd]

No, you didn't? It clearly shows I edited my post where you quoted me, meaning I already edited my post before you replied. You just didn't read it. I wasn't trying to be condescending, I just wanted to point out to the OP I corrected my post, so he wasn't confused.

I was asking for clarification on what oil ports supply pressurized oil to the head on a 4G63. I am confident only the one single oil port pictured above is pressurized, but wanted someone to confirm. According to the oiling diagrams in the FSM, there is only one port, so I want to make sure I'm not missing something.

How about this, you both are spamming my thread and I'm trying to get answers... your arguments are irrelevant

 

[GST with PSI]

^Noted.

You can perform the tests I suggested (check upper radiater hose, compression, CLT) to see if any of the cylinders are leaking into the cooling system.

In addition, the oil feed port to the head could possible be leaking into a water jacket. Although probably unlikely, it's possible. You could pressurized the cooling system with a cooling system pressure tester and try to determine if the oil port is leaking into the cooling system. I'll dig around and see if I can find some pictures.

 

[Spaz5spd]

^Noted.

You can perform the tests I suggested (check upper radiater hose, compression, CLT) to see if any of the cylinders are leaking into the cooling system.

In addition, the oil feed port to the head could possible be leaking into a water jacket. Although probably unlikely, it's possible. You could pressurized the cooling system with a cooling system pressure tester and try to determine if the oil port is leaking into the cooling system. I'll dig around and see if I can find some pictures.

Awesome, ty not trying to be an ass, just the "chicken or the egg" argument was unnecessary

 

[92AWDHX40]

Curious how much sludge are you talking about?

 

[GST with PSI]

I circled the oil supply port to the head in green. It could be leaking into the water jacket circled on orange. After pressurizing the cooling system, you may be able to hear air leaking in that area. Maybe pull the oil cap and see if it sounds like air leaking in there as well.

 

[Spaz5spd]

Curious how much sludge are you talking about?

Enough to be worried about. At first was small puddle on floor below thermostat housing. (Forgot to put silicone sealant). Second run was spraying from edges of housing

I circled the oil supply port to the head in green. It could be leaking into the water jacket circled on orange. After pressurizing the cooling system, you may be able to hear air leaking in that area. Maybe pull the oil cap and see if it sounds like air leaking in there as well.

Ty bro I'm almost certain there is a leak back there too. Thanks for checking

 

[92AWDHX40]

Ah well that's not good I don't think ive ever had that amount of sludge on any of my set ups.

 

[Phantom DSM]

How about this, you both are spamming my thread and I'm trying to get answers... your arguments are irrelevant

My bad on that
Since you have not pulled the head yet, do you have access to a compression tester as Gst with PSI is recommending ? better yet a leakdown tester as well
Coolant pressure test can be borrowed from parts store

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[GST with PSI]

Just to confirm, you are seeing the sludge in the cooling system, not sludge (chocolate mile looking stuff) in the oiling system right?

 

[Spaz5spd]

My bad on that
Since you have not pulled the head yet, do you have access to a compression tester as Gst with PSI is recommending ? better yet a leakdown tester as well

Negative... but I think the gallery didn't seat proper in that spot

Just to confirm, you are seeing the sludge in the cooling system, not sludge (chocolate mile looking stuff) in the oiling system right?

Correct

 

[92AWDHX40]

Have you had any loss of coolant?

 

[Spaz5spd]

Have you had any loss of coolant?

Ya and white smoke

 

[92AWDHX40]

Do a compression test, and tell us the numbers a composite gasket is what ive always used on my engines, and had my head and block decked just to make sure.

 

[GST with PSI]

better yet a leakdown tester as well
Coolant pressure test can be borrowed from parts store

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^This. Just as he said, go to your local parts store and you can rent one free (with a deposit). Pressurize the cooling system and see where you are leaking.

Here's what I'd do step by step:

-Start the car cold, and do the radiator hose grab test. If the upper radiator hose pressurizes immediately, pull the head, because you have combustion gases leaking out of the combustion chamber into the cooling system. This is the quickest and easiest test, hence it being first.

-If it doesn't pressurize, check the cooling system using a pressure tester. If you pinpoint the leak, determine whether or not you need to pull the head.

-If both tests above don't reveal anything, perform a compression test, followed by a CLT if necessary.

Bottom line, the oiling and cooling system are tied in somewhere they shouldn't be. You just have to find where. Unfortunately, I'd say there's a 99% chance you will have to pull the head, so prepare for that.

 

[92AWDHX40]

Grab a new hg and you should all be good since you've done it before it should be all good.

 

[Spaz5spd]

Resolved:

Head gasket was backwards
also not a quality gasket- (ebay)

Some reassembly pictures

 

[GST with PSI]

WTF? It looks like the Lucky Charms Leprechaun puked all over your valve cover

Other than that, I'm glad you figured out your issue. Thanks for posting up the resolution.

 

[Spaz5spd]

WTF? It looks like the Lucky Charms Leprechaun puked all over your valve cover

Other than that, I'm glad you figured out your issue. Thanks for posting up the resolution.

Pic doesn't do it justice valve cover is custom dipped

 

[GST with PSI]

Yeah, that's definitely custom, no doubt. To each his own I suppose.

So the car running ok now?

 

[Spaz5spd]

Yeah, that's definitely custom, no doubt. To each his own I suppose.

So the car running ok now?

Not yet cam seals in morning, torque gears and time. Oil / coolant change. She should be fine though.

Yeah, that's definitely custom, no doubt. To each his own I suppose.

So the car running ok now?

This is a little better resolution of it. Looks awesome in person.

 

[talonesi95t]

Old thread bumb but OP what brand head gasket did you end up using?

 

[Spaz5spd]

FEL PRO machine head HG MLS