MASSIVE D18Y8 Head Onto D15B7/8 Block MiniMe Swap Writeup!!!

[l2ichard]

what about the vtec selenoid does it matter which one to use?

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[cxegrotas]

great write up

[Dasfinc]

Originally Posted by l2ichard

what about the vtec selenoid does it matter which one to use?

Timing Belt with all D15 Series engines to a D16 head I have found is supposed to be a Z6 timing belt.

the Solenoid is important, Z6 Solenoids only work on Z6 heads, Y8 solenoids only work on Y8 heads, and I have no idea how you have a D15B with a Y8 solenoid and it works at all.

[Dasfinc]

Originally Posted by cxegrotas

great write up

Thanks, I just wish I knew why I keep blowing headgaskets!!!

[Dasfinc]

Originally Posted by Dasfinc

Thanks, I just wish I knew why I keep blowing headgaskets!!!

Might as well post the newest update:

even after correcting the cam and ignition timing the car still had a slight miss in the low revs, due to circumstances with my Girlfriends car, she had to drive the honda in that condition for 2 months, I tried correcting it again last weekend, and shortly after the headgasket let go.

This past weekend I've plated and insured her new car *1995 Taurus SHO* that I had picked up for a steal and repaired some moderate front-end damage.

So the honda is nolonger under a time constraint so I will peel the head off the car again when it gets a little nicer outside, at this point it can be any number of issues still:

didn't torque the headgasket well enough again, so it may have been burning some coolant and at the higher revs it didn't matter because it was producing enough power, which would explain why it would surge so randomly

Plug wires or plugs are/were bad

or the D15B8 Distributor isn't compatible with the Y8 head.

In another few weeks I'll have the headgasket replaced and new plugs, wires, and test a Z6 dizzy all in sequence to see exactly what caused this problem.

I will also repair my EX tranny shortly while the car is down anyways and install that with the fresh headgasket.

[eggreenrider]

sweet........

[eggreenrider]

did u put a timing light in the car? n did u check the timing on thedizzy?

[coneheadsracing]

Not sure if you've fixed the headgasket issue or not. I would look into syncing your computer to the actual timing on your car. Theres been much debate in the past in regards to what happens with swaps like this, or using a y8 motor in an obdI car. I know with mine it was off. Also, you have your computer chipped, was it tuned, if you are runnning an increased compression and not pulling timing, or worse running a chip off ebay that has timing advanced in it, that could be your issue also. Might want to run premium gas also.

[suspendedHatch]

Z6 distributor is wrong for a Y8. You're going to need any OBD2 d-series distributor or a OBD1 non-VTEC, 16 valve distributor (DX, LX).

[l2ichard]

thanks for everything..

NEwest update:


well i figure out why my d15b was running weird.

first of wall it was a 3 stage d15b and not the y8 head..( you can tell by the valve train) and did not have the dual selenoid.. it had the ex selenooid.. therefore, the lower rpm vtec activation never got turn on. thus making my car feel powerless before vtec when all four valves activate.

i goign to replace the head with the y8 head and that should fix the problem becaue it only 2 stage.. and only one selenoid..

i will slap that head on this spring break.. ill let you know it that fix it..

[l2ichard]

TO DASFINC

well if you are loosing power.. you should do a compression test.. which is really easy.. just need a comprassion gauge..

and if it does leak compression.. you can do a leak down test.. which you can make one ..

so if air leaks from the exhaust ports it is the valves, intake ports it is the valves also.. and if comes out form the spark plug holes.. is the piston rings..

and if your burning coolant.. it isnt always the head gasket.. most of the time it is.. but i can also be a crack on the head.. which you can take to a machine shop to pressure test it.

that would explain why your spark plugs are bad because they get soaked with coolant unless they are oil fauled..

and if the spark plug wires are oil fauled it can be valve cover oil seals on the spark plug holes

[Dasfinc]

Originally Posted by l2ichard

TO DASFINC

well if you are loosing power.. you should do a compression test.. which is really easy.. just need a comprassion gauge..

and if it does leak compression.. you can do a leak down test.. which you can make one ..

so if air leaks from the exhaust ports it is the valves, intake ports it is the valves also.. and if comes out form the spark plug holes.. is the piston rings..

and if your burning coolant.. it isnt always the head gasket.. most of the time it is.. but i can also be a crack on the head.. which you can take to a machine shop to pressure test it.

that would explain why your spark plugs are bad because they get soaked with coolant unless they are oil fauled..

and if the spark plug wires are oil fauled it can be valve cover oil seals on the spark plug holes

Naw, it was just timing still, D15B8 is marked different from D16's on the crank pully, so I never got it right.

I'm glad I was of help to you though!

I got fedup with it, and went another route:

*here's my car as it sits today*




Modified by Dasfinc at 1:03 PM 3/23/2008

[TONY AKA BILLY]

nice write out bro

im actually doing something similar to this but im using a d16y7 block and dohc zc pistons with a y8 head a true time aem cam gear and a skunk2 camshaft and with an oem 2 layer y8 head gasket it should be a decent set up o and i want to put on my jdm zc intake manifold