Head Gasket went, looking for advice - Page 2 - Turbo Dodge Forums : Turbo Dodge Forum for Turbo Mopars, Shelbys, Dodge Daytona, Dodge SRT-4, Chrysler PT Cruiser, Omni and more!

Engine - General, Exhaust & Induction Topics about the general engine items, exhaust system discussed here & Improving the intake tract - air filter to intake valve.

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post #16 of 24 Old 08-22-2019, 08:35 AM
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Re: Head Gasket went, looking for advice

If you are looking for a Mopar OE Gasket and Headbolts...

https://www.rearcounter.com/4105468-parts1308897.html

https://www.rearcounter.com/6500754-parts361971.html
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post #17 of 24 Old 08-22-2019, 09:13 AM Thread Starter
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Re: Head Gasket went, looking for advice

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Which HG do you prefer NAJ? Mopar or Felpro?
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post #18 of 24 Old 08-22-2019, 10:24 AM
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Re: Head Gasket went, looking for advice

Well, according to Pope we are comparing apples to oranges since the heads are not the same between your 84 and my 90.

I have used both Fel-Pro Permatorque and a Mopar Performance HG.

The OE lasted 90,000 miles before it went, it was replaced with a Fel-Pro and we did a "slip and slide" because I needed the car back on the road ASAP.
The Fel-Pro was working fine until I developed an Overboost issue (story for another day) and each time I checked/changed something I would take the car out and go WOT to see if the Overboost issue was gone, well one day the HG had enough and BOOM!!!
That gasket was replaced with a MP headgasket I got online before they were discontinued, I also installed ARP head studs when I installed that gasket.
The MP gasket lasted 6 years (about 21,000 miles) and developed a pin hole leak.
That gasket was replaced with a Fel-Pro which is still in the car.

The last HG was done in Sept 2016, 10,000 miles ago.
To be honest with you, I still use a bit of coolant (1 qt per month from the overflow bottle) with no visible leaks, is it from a HG sealing issue?

IMO and I am not an expert on the early cars with 10mm head bolts I would use the Mopar gasket if I could be sure there would not be any issues with it from sitting on a shelf for 20+ years.
If it were me, today at my age, being retired and not driving much I would just get another Fel-Pro and be done with it.

I am sure Pope will chime in again with more wisdom so we both can learn something. (Not being Sarcastic)

BTW...
When I was a Chrysler Tech (1995-2010) all Mopar short blocks came with McCord Gaskets so the assumption has to be that they were the vendor for Mopar gaskets.
My Grandfather sold McCord Gaskets in his parts store back in the 60's when I worked with him in the summer.
McCord was bought out by Federal-Mogul who also owns Fel-Pro so draw your own conclusions.

Overboost 5/21/10
Head Gasket went, looking for advice-head-gasket-5-21-10.jpg

MP W/Pinhole 9/11/16
Head Gasket went, looking for advice-head-gasket-b-9-11-16.jpg
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post #19 of 24 Old 08-22-2019, 11:19 AM
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The new Felpro leaks cylinder pressure as the one side went to all metal. The problem and why the MP gasket was made is material hardness and the ring with a paper type gasket. So the MP gasket was made softer to seal squish better and the combustion ring is stronger. BTW in Alaska the MP gasket was a stock replacement as they have bigger expansion and contraction problems. Also on the list is power levels on stretching bolts. The 10mm is weak, that combined with a rock hard Felpro will leak under boost, though won't pop. Copper spray and a Mopar gasket and bolt combo is best on a 10mm car. Again this is a kid doing in in a parking lot possible not in a shop. In a shop I'd get the 11mm studs and tap the block. If the engine has little ware, I'd pull it, hine it and over haul it and deck it. Then add a MLS that will be there for ever. Big one is cost, MP parts are expensive. So it isn't a big deal to get a Cometic if you go that far. Modest boost around 10 and the MP could be a 80K gasket. If the head is warped at all and you use a rock hard Felpro set it'll leak like a cracked head right away. Ive bought cars with a warped head. Added the MP gasket and studs and never leaked. As the studs are stronger than the head..... many ways to look at it, physical reasons people have different results. Mopar has been buying and packaging Felpro sets under the engine set. I believe you can get the 006 gasket still and drill the coolant holes in it if needed. 005 should have been the gasket design kept.....
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post #20 of 24 Old 08-22-2019, 11:24 AM
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BTW if you go to the 11mm bolt, you need 2 sets of washers. Not the single set. The MP set cones with extra washers. As the 11mm set is for the taller 782 head. The other option is cross reference the 10mm bolts. If a more popular engine uses a cross reference you can use 10mm studs possibly. But a hunt lol
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post #21 of 24 Old 08-22-2019, 03:05 PM Thread Starter
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Re: Head Gasket went, looking for advice

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The new Felpro leaks cylinder pressure as the one side went to all metal. The problem and why the MP gasket was made is material hardness and the ring with a paper type gasket. So the MP gasket was made softer to seal squish better and the combustion ring is stronger. BTW in Alaska the MP gasket was a stock replacement as they have bigger expansion and contraction problems. Also on the list is power levels on stretching bolts. The 10mm is weak, that combined with a rock hard Felpro will leak under boost, though won't pop. Copper spray and a Mopar gasket and bolt combo is best on a 10mm car. Again this is a kid doing in in a parking lot possible not in a shop. In a shop I'd get the 11mm studs and tap the block. If the engine has little ware, I'd pull it, hine it and over haul it and deck it. Then add a MLS that will be there for ever. Big one is cost, MP parts are expensive. So it isn't a big deal to get a Cometic if you go that far. Modest boost around 10 and the MP could be a 80K gasket. If the head is warped at all and you use a rock hard Felpro set it'll leak like a cracked head right away. Ive bought cars with a warped head. Added the MP gasket and studs and never leaked. As the studs are stronger than the head..... many ways to look at it, physical reasons people have different results. Mopar has been buying and packaging Felpro sets under the engine set. I believe you can get the 006 gasket still and drill the coolant holes in it if needed. 005 should have been the gasket design kept.....

Wow, first of all thanks for all the advice and help. I am putting together what I need to buy to get started on this
1. Chrysler Service Manual
https://www.ebay.com/itm/1984-Servic...oAAOSwZbRdWaYO
2. Mopar Gasket and Headbolts -
https://www.rearcounter.com/4105468-parts1308897.html
https://www.rearcounter.com/6500754-parts361971.html
3. Brushes to clean deck
https://www.3m.com/3M/en_US/company-...3223502&rt=rud
4.Copper spray

TOOLS - I am sure I am gonna miss lots here and maybe even some real obvious stuff but let me know lol :P
Socket set
Wrench set
Rubber Mallet
Metal bar to help with tougher bolts

This is what I have put together so far but let me know what I am missing, of course while I have everything out if I notice that timing belt or any hoses are looking real bad I would change them as well. Thanks all!
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post #22 of 24 Old 08-22-2019, 04:53 PM
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Re: Head Gasket went, looking for advice

Quote:
Originally Posted by miccodan View Post
Wow, first of all thanks for all the advice and help. I am putting together what I need to buy to get started on this
1. Chrysler Service Manual
https://www.ebay.com/itm/1984-Servic...oAAOSwZbRdWaYO
2. Mopar Gasket and Headbolts -
https://www.rearcounter.com/4105468-parts1308897.html
https://www.rearcounter.com/6500754-parts361971.html
3. Brushes to clean deck
https://www.3m.com/3M/en_US/company-...3223502&rt=rud
4.Copper spray

TOOLS - I am sure I am gonna miss lots here and maybe even some real obvious stuff but let me know lol :P
Socket set
Wrench set
Rubber Mallet
Metal bar to help with tougher bolts

This is what I have put together so far but let me know what I am missing, of course while I have everything out if I notice that timing belt or any hoses are looking real bad I would change them as well. Thanks all!
Make sure that your sockets & wrenches are 6 Point as the 12 point ones can round off the bolt heads & nuts.

Penetrant oil! Soak any rusty fasteners with this overnight and tap on them before loosening them. Be patient and apply more if needed. You DON'T want any broken bolts or studs to deal with. Not fun at all!

Torque wrench. You get what you pay for. Avoid those cheap ones from Harb Frt!

Some baggies & a sharpie to label & keep the fasteners in. It'll make it easier when you reassemble.

I'm sure our Resident Pros will add to the list...

Good luck & happy wrenching!
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post #23 of 24 Old 08-23-2019, 09:13 AM
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Re: Head Gasket went, looking for advice

Pope is correct, MP gasket with copper spray and if you clean down both mating surfaces extremely well you should never have a H/G issue again.

This is the only combo we use and has worked well at almost 40psi boost and 600WHP in the Charger and H/G jobs we've done 15 years ago on lesser street TD's are still going strong today.

Copper spray both sides of the gasket, usually 2-3 light coats so it goes on even until hiding (all copper color)

The copper will help fill imperfections in the deck surface as well as the head, but it's the deck surface that usually needs it the most.

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post #24 of 24 Old 09-07-2019, 11:48 AM
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Re: Head Gasket went, looking for advice

CORTECO 20032CS

Identical to the stock mopar gasket I'm seeing and 5 dollar close out on rockauto. Another really close one is ROL. Corteco literally looks like named Mopar
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