1G Pushing coolant

[goonie]

Hi there
After replacing copper headgasket for a mls oem headgasket engine is stil pushing coolant
This is one a new engine and new head mls torqued to 90ft/lbs
Engine did not overheat before so i didnt resurfaced the head
Because everything was new and the car didnt Drove much 10 Miles tops
Any ideas?
Thnx
I attached a vid

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[BLACK'98DSM]

This is probably just air burping out of the system, or your rpms are too high. Is the car on defrost when you did this?

 

[EVLGSX]

Bummer- The surfaces must be perfect to achieve success with that gasket. Yours must not be.

Bet if you swap it for an OEM composite you would be good

 

[goonie]

This is probably just air burping out of the system, or your rpms are too high. Is the car on defrost when you did this?

thats not a burp when i rev the engine it pushes the coolant out
when car idles temp stays oke when driving the car it heats up
exhaust gasses are heating up coolant
what do you mean by defrost?

 

[goonie]

Bummer- The surfaces must be perfect to achieve success with that gasket. Yours must not be.

Bet if you swap it for an OEM composite you would be good

this was a fresh rebuilt new shortblock and new head
want to run 30 plus psi would a composite do the job?

 

[AWD-Tony]

I didn't know which hg to used when I refreshed my head and the consensus was a composite hg since I was only having the head decked. Pretty sure you want both surfaces decked when using mls. Do a compression test. I've been on 28psi for about a week on composite hg. No issues with hg but dealing with other issues. I'll be pushing 30 w E85 when she's all back together.

 

[Kai Hefner]

That MLS on a non-resurfaced head/block is definitely not okay, could be your problem, but not too sure. I guess it would make sense if the compression is pushing on your cooling system.

 

[Spdfreak]

Perform a cylinder leak down test. That will quickly determine if combustion gasses are getting into the cooling system.

 

[goonie]

yes my engine builder suggested to use a blocktester kit first

 

[BLACK'98DSM]

what do you mean by defrost?

Nevermind, that doesn't apply to these engines. I was thinking in terms of circular cooling systems. Also, you didn't state that it was overheating at first, so I didn't know. My bad.

 

[EVLGSX]

this was a fresh rebuilt new shortblock and new head
want to run 30 plus psi would a composite do the job?

all day

 

[kenuwine4g63]

Hi there
After replacing copper headgasket for a mls oem headgasket engine is stil pushing coolant
This is one a new engine and new head mls torqued to 90ft/lbs
Engine did not overheat before so i didnt resurfaced the head
Because everything was new and the car didnt Drove much 10 Miles tops
Any ideas?
Thnx
I attached a vid

You must be logged in to view this image or video.

Most definitely get both head and block machined when running any gasket but composite. MLS, Cosmetic, felpro mls etc. Also what Arps are you using? New arps i torque down to 110pds/ft. Im not recommending it if you dont want to chance it.

Besides all that, i use a felpro composite gasket(commercial store special $38) and have been at 40psi with a gtx3582 turbo. Seems your pushing a lot more than you should, may be time to tear her apart. .003 of warpage can cause sealing issues.

 

[goonie]

Most definitely get both head and block machined when running any gasket but composite. MLS, Cosmetic, felpro mls etc. Also what Arps are you using? New arps i torque down to 110pds/ft. Im not recommending it if you dont want to chance it.

Besides all that, i use a felpro composite gasket(commercial store special $38) and have been at 40psi with a gtx3582 turbo. Seems your pushing a lot more than you should, may be time to tear her apart. .003 of warpage can cause sealing issues.

i used new L19 arp's torqued them to 90ft/lbs
block was new head also never overheated did run only about 10 miles when i discovered temp was rising due to headgasket failure
gonna do the blocktester fluid first to be sure
and worse case re surface the head and put on new HG
so you say felpro composite will do the job??

 

[goonie]

New arps i torque down to 110pds/ft.

do you use the arp washers when you torgue them to that value
or the insert washers?
what do you suggest as torgue value for a mls oem HG ?

 

[kenuwine4g63]

i used new L19 arp's torqued them to 90ft/lbs
block was new head also never overheated did run only about 10 miles when i discovered temp was rising due to headgasket failure
gonna do the blocktester fluid first to be sure
and worse case re surface the head and put on new HG
so you say felpro composite will do the job??

Absolutely. Copper spray it as well. Well, at least i do.

 

[kenuwine4g63]

do you use the arp washers when you torgue them to that value
or the insert washers?
what do you suggest as torgue value for a mls oem HG ?

I use the regular washers. If you look at the torque spec without the arp lube you'll see its much higher than 90ft/lbs.

I'll go custom age 625+ on my next set, they require a little or torque and ill leave them at what they call for.

 

[streetraceboi]

Surface finish on the head for an MLS gasket will be different. IF you want to keep it simple, throw a composite gasket in. I hoped you check the head for true flatness as well while it was off.

 

[CJ512]

Mls head gaskets require a surface finish in the range of 0.7 to 1.2 micrometers RA (Roughness Average), which is (27 to 47 microinches RA) with no more than 0.2 to 0.6 micrometers of waviness. That's pretty specific and should be consulted with the machinist.

 

[3kidslater]

This may sounds elementary but check the hose to the overflow make sure it’s air tight from the housing to the overflow bottle

 

[EVLGSX]

I would not copper spray it. You should not have to. This is another one of those things that many disagree on.

One thing that is agreed on, is that the OEM Mitsu and the Felpro are equal in quality and performance. Only difference is the price.

 

[motomattx]

I would not copper spray it. You should not have to. This is another one of those things that many disagree on.

One thing that is agreed on, is that the OEM Mitsu and the Felpro are equal in quality and performance. Only difference is the price.

Agreed, do not copper spray anything other than a copper gasket, the composite gasket is coated with graphite lube, that spray will not stick to it or do any good at all, it will just make a mess, mls gaskets are meant to move, again trying to glue those to the block and head defeats their purpose.

 

[goonie]

Agreed, do not copper spray anything other than a copper gasket, the composite gasket is coated with graphite lube, that spray will not stick to it or do any good at all, it will just make a mess, mls gaskets are meant to move, again trying to glue those to the block and head defeats their purpose.

so probably the copperspray messed it up
i remember seeing flakes of the copperspray floating in the coolant
and what if i retorque the headstuds to 105ft/lbs ?could that make a difference
or just trow in a composite gasket
thats gonna be the third headgasket on an engine that barely drove 10 miles

 

[motomattx]

Just throw in a composite gasket after a good cleaning including wiping both mating surfaces with acetone until the lint free cloth that you will use comes out clean, flipping the cloth each pass.

 

[import solutions]

Put a 9627pt + arps + 2 /3 ugga duggas AND send it

 

[jed344]

Sounds like unless you want to have the head and block machined to spec you are looking at using a composite. That being said I have used them for years and never had one fail even at 30psi+ and 500hp+. Currently am using a OEM composite with L19's and a 0 ringed head and have zero worry's pushing it well past 30psi.