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Discussion Starter #1
Hello, Several years ago I replaced a head gasket on a D15B1 1990 civic SOHC. Long story short, I bought a remanufactured head due to problems with a machine shop doing the work on the original head. Needless to say, I had a head gasket issue again and now I am rebuilding the entire 1.5 L engine. The problem I have is that the remanufactured head is from a 1.6 L civic. I am aware of this because of the valve spring lengths, cam lobe heights, etc.

The question is: Is this really a problem. I am a Mech Engineer in the Automotive world and understand theories, but sometimes a really solid engine mechanic can school an engineer....yes, I will admit to this.

Can I use this head or is this possibly a reason why I had my second issue with this cyl head (loss of cyl compression).

PS. The car ran fine for about 10,000 miles.
 

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BATSLOMAN GIVES NO FUCKS.
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google d15b1 mini-me.

read.

???

profit!
 

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Classic Man
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So you have a D16A6 head you want to use? Just to be clear.

If so, you just use a Y7/Y8 cam gear. Or you can find a D15B1/2 cam, and build it like stock.


But just to confuse you, if your D16A6 cam is from an 88 CRX, you use a stock cam gear. Hah.



So lets say you didnt use the correct cam gear to correct the timing change from the D15's lower deck height in comparison to a D16... you would be half a tooth advance or half a tooth retarded for mechanical timing. The engine would run either way for basically ever just with lowered performance. So I dont think that is the source or cause of your mechanical failures.
 

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Discussion Starter #4
To be clear, The Cyl head code reads P_3-12. Between the P and 3 the letter has been removed or ground away for some reason. The date code is 88. That being said, the cam lobe height for the intake is around 1.4197-1.4202 and exhaust is 1.4250-1.4256. Intake Spring length is 2.0250-2.0315 and exhaust is 2.1635-2.1750. Valve diameter: intake: 0.2157 and exhaust is 0.2146.

I am just a little puzzled as to what I have since I ordered a remanufactured head for the build. Wish I kept the old head, but I have what I have. BTW, Cam gear reads PM3B. I don't recall if I got the remanufactured head with a cam gear back in 07 or not. I think I simply put the old one on. Got it/

Appreciated the help.
 

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BATSLOMAN GIVES NO FUCKS.
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where are you located? maybe an entire d16 would be cheaper/easier to rebuild than mucking around with somebody's elses repair. weird they would ground down any identifying marks
 

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Asshole
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If it's an 88 d16a6 head then it sounds like you are good to go. However being nearly 30 years old it could have any sort of mix-matched parts. You'll have to google cam lobe measurements to find out what you really have for a cam and go from there. The head stamp should read PM3.

This would be a good time for an mpfi swap if not already done.
 

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THE CRX
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Hello, Several years ago I replaced a head gasket on a D15B1 1990 civic SOHC. Long story short, I bought a remanufactured head due to problems with a machine shop doing the work on the original head. Needless to say, I had a head gasket issue again and now I am rebuilding the entire 1.5 L engine. The problem I have is that the remanufactured head is from a 1.6 L civic. I am aware of this because of the valve spring lengths, cam lobe heights, etc.

The question is: Is this really a problem. I am a Mech Engineer in the Automotive world and understand theories, but sometimes a really solid engine mechanic can school an engineer....yes, I will admit to this.

Can I use this head or is this possibly a reason why I had my second issue with this cyl head (loss of cyl compression).

PS. The car ran fine for about 10,000 miles.
The head is easily mounted. We add 1.6 heads to 1.5 all the time. They are called mini me's
That means at a natural rate the compression chamber achieves pressure as the rods and crank plus quench from ptdh rotate at more Rpm's. With an advanced gasket you can power add natural. Bigger injectors, ignition timing etc.

Btw. Vin. Don't troll my website . Read the stickies and stop letting Tyrese write your comments.
 

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Discussion Starter #8
This is all great stuff. Everything lines up with the cam gear and no "offset" marks. I did get Victor Reinz W0133-1614886 gasket kit and the additional steel head gasket and new head bolts. My real question now is that I do recognize about 75% of the kit parts, but some of those O-rings I have no ideas where they go. I cannot find on the internet any listing other than simple 5 orings, soft rubber parts. I do not want to mess up as I am rebuilding the whole engine.
 

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Asshole
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A non specific gasket kit will come with extra gaskets used for differences between engines. Without posting a pic of what you're asking about no one can help.
 

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If you are having HG problems after two heads, the pretty obvious answer is the deck on the motor isn't flat . . .

If you switch to a MLS gasket a la d16y8, you will have to have the deck surfaced on the old block if it previously had a graphite one on there. MLS gaskets require better Ra surface finish values than you can get by scraping and using a piece of sandpaper wrapped around a block of wood . . .
 
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