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Ok guys any help is much appreciated, and happy holidays.
Daily driving a 95 dx hatch AT needs head gasket, still driving, not even running warm but coolant turning black and car sounds/runs doggy.
i just picked up a very poorly running 93cx MT needing head gasket. And i also have a 94ex MT that threw a rod bearing.
Planning on a minime with 5spd swap, But dont have all parts/money needed(which is whole nother question lol) should i Do the mini on the b8 and once i know its running good swap that motor with the z6 head and MT?? Or wait and do the swap when i have all parts in hand?? Which would mean doing a head gasket replace on the b7....is there a good reason to use something other than a b7 gasket, if im planning to do the mini and swap later?
95 dx hatch 330k runs smooth no knocks, and is only car with useable body/chassis.
94 ex coupe threw bearing, 220k on head/motor.
93 cx hatch, unknown mileage. Unknown if it has 4relief pistons or not.
Ill add that i have always done my own mechanics, but never any internal motorwork.
Whichever option you eventually choose, have the head and block surfaces leveled by a machine shop and clean out the block head bolt holes to make the job seamless and long lasting.
I plan on doing that with whatever is gonna stay in the car. But not if i just do the b7 to get by, which the more i think about it, thats what im leaning towards... But for a "temp fix, maybe a year or more) is it worth useing a Y8 or some other gasket? Or just stick with b7?? Does one seal better on NOT perfect surfaces?
And do you have any suggestions on who to talk to about doing the mini me? I have the whole ex car, most write ups involve searching/buying a bunch of parts, gets confuseing
And do you have any suggestions on who to talk to about doing the mini me? I have the whole ex car, most write ups involve searching/buying a bunch of parts, gets confuseing
Surface leveling is also critical for just a head gasket swap, where you should use the Honda D15B7 gasket and follow the instructions in the Honda service manual.
Ive gone thru a bunch, and made comments but no replies, and have not directly messaged anyone. And the head/cam gear/belt combo seems like a big debate
Ive gone thru a bunch, and made comments but no replies, and have not directly messaged anyone. And the head/cam gear/belt combo seems like a big debate
I would go with the decision you seem to be leaning toward - install new head gasket in the D15B7.
With your daily driver back in action, you will have sufficient time to plan a future mini-me or engine swap.
honda made a revised graphite gasket. ishino leak gasket iirc.
It's not a graphite gasket, the leak gasket is a true MLS with black polymer coating. The standard non leak replacement is another graphite gasket as far as I know.
Im rebuilding my 1980 EM next week. Then Im saving for a d16 swap.
I was considering geting the EM head machined. I have a cast iron block and dont plan to pull the engine. I will get a machinist level or something similar and check to make sure its not obviously warped. I was under the impression the graphite gasket was better with slight wear on the head/ block and MLS needs to be machined. Am I wrong? I was planning on graphite and RTVblack for the head/ New gaskets. Timing belt, water pump, fluids, filters, plugs, wires, weber carb conversion. Should I get an oil pump?Anything Im missing or suggestions are appreciated.
Here is the Ishino head gasket that Honda currently sells:
Yes, I believe Honda discontinued the leak gasket so only sell the graphite gaskets for these old cars. You have to goto autopartsway to get the Ishino Stone leak gasket as Ishino still makes the leak gasket. As can be seen in the details, the 12251-PM5-S02 is the same crappy graphite gasket originally used which will have the same inherent weaknesses it always has had that created TSB 97-047 and costly repairs sooner instead of later. The leak gasket listed below "ISH1621414" is the 4 layer MLS leak gasket made for the D15B7 engine that is superior to the original graphite gasket but does take a bit more effort to install/use.
Part Number: ISH1621414 Manufacturer: Ishino Stone
Product Notes:
This special head gasket should be used when failure was caused by gasket leakage. Please refer to Honda service bulletin 97-047. It advises that if the head gasket is being replaced due to leakage, this is the correct replacement gasket. Also recommended are special head bolts (90005-PM3-004, 10 bolts required). If the head gasket is not leaking but is being replaced for other reasons, use gasket #12251-PM5-S02 along with the normal head bolts. Refer to the service bulletin for further installation instrustions.
Yes, I believe Honda discontinued the leak gasket so only sell the graphite gaskets for these old cars. You have to goto autopartsway to get the Ishino Stone leak gasket as Ishino still makes the leak gasket. As can be seen in the details, the 12251-PM5-S02 is the same crappy graphite gasket originally used which will have the same inherent weaknesses it always has had that created TSB 97-047 and costly repairs sooner instead of later. The leak gasket listed below "ISH1621414" is the 4 layer MLS leak gasket made for the D15B7 engine that is superior to the original graphite gasket but does take a bit more effort to install/use.
Part Number: ISH1621414 Manufacturer: Ishino Stone
Product Notes:
This special head gasket should be used when failure was caused by gasket leakage. Please refer to Honda service bulletin 97-047. It advises that if the head gasket is being replaced due to leakage, this is the correct replacement gasket. Also recommended are special head bolts (90005-PM3-004, 10 bolts required). If the head gasket is not leaking but is being replaced for other reasons, use gasket #12251-PM5-S02 along with the normal head bolts. Refer to the service bulletin for further installation instrustions.
I posted a link to the NIPPON leakless head gasket for the OP's car below.
Looks like Nippon is more in line with Dealership prices. The Ishino leak gasket is 55 USD versus OEM Graphite for 80 from Dealership or the Nippon for 80 from Amazon.
It would be interesting to know who originally made the leak gasket for TSB 97-047 back in the day. I assumed it was Ishino based on what I was seeing when I was researching it all several years ago for my old B7 but now that I see Nippon also makes one..... It's anyones guess. Amazon seems to state that the Nippon is the OEM gasket though.
Cheers
One small problem, the part number you posted for the Nippon is for the D16Z6 not the D15B7:
Looks like Nippon is more in line with Dealership prices. The Ishino leak gasket is 55 USD versus OEM Graphite for 80 from Dealership or the Nippon for 80 from Amazon.
It would be interesting to know who originally made the leak gasket for TSB 97-047 back in the day. I assumed it was Ishino based on what I was seeing when I was researching it all several years ago for my old B7 but now that I see Nippon also makes one..... It's anyones guess. Amazon seems to state that the Nippon is the OEM gasket though.
Put the EX head and intake on your DX engine and there is the mini-me. You do not have to actually hook up the VTEC right away, as it will run fine (but not quite as fast) without it. No sense messing with the non-VTEC head any more when you have a presumably good VTEC one. The regular graphite gasket that costs about $30 should be fine for a stock setup. Do realize that every time you take the head off you need a new gasket.
Once you have the engine working well, look at using either the CX or EX parts for your auto to manual swap.
One thing to keep in mind, the B7 piston to deck height is .002" (almost flush) so the quench distance is set by the head gasket. From my understanding optimal is .035" to .040". The D16Z6 and D16Y8 gaskets do not reach optimal if I remember correctly so that leave either the Graphite gasket or the Ishino Leak gasket or specific gasket from companies like Cometic.
Under the optimal space tends to cause pinging (detonation) under load and the only real fix is a retard in ignition timing, reducing power further.
12-24-2018, 07:52 AM
Head gasket question... Need advice asap
