This is on a d16y8. Ideally, I wanted my clearances to be as follows:

1,5 - .0014
2,3,4 - .0017

That would already be on the loose side of the honda specs.

But here is how they plastigauged with ACL's:

1,5 - .0017-.0018
2,3,4 - .0019-.0020

I couldn't get the readings to an exact number because each of my 6 plastigauge readings was +/- .0001. Oh, and plastigauge is a bitch to work with on a SOHC because the girdle is hard as hell to pull off without ruining the gauge.

But how do those numbers sound? I know the honda service limit is .002 which is about what my 2,3 and 4 are at. My setup is with an SC50 at 20psi in a daily driver.

So for ease of replying:
1. Do you think my clearances are too loose?
2. What oil viscosity should I use?
3. Will my engine life be significantly reduced running clearances this loose? I only put on about 5k miles a year, but I still don't want to rebuild it anytime soon.

 

they're a bit looser but it'l;l still work. i had my ACL's at .0015 and spun the bearings.

put new bearings .0020 and its all good now.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by project dc2 &raquo;</TD></TR><TR><TD CLASS="quote">they're a bit looser but it'l;l still work. i had my ACL's at .0015 and spun the bearings.

put new bearings .0020 and its all good now. </TD></TR></TABLE>


But didn't you spin a rod bearing?

 

thats the problem with these ACL bearings....their pretty much one size fits all. if they were OEM honda bearings you could get the next size up bearing colour and get the exact specs you needed.

the specs you got are good enough. i wouldent worry much about them. its better to have them a little on the loose side for a boosted engine.

i would used a 10w40 engine oil with any boosted honda engine........thats what im using and it works great.

 

Is there a chance that running thicker oil will promote oil pump failure? Because y8 oil pumps are already known to suck.

Some background info - the motor is built up six ways from sunday and will be regularly revved to 8500-8800.

 

you could at least install an oil pressure guage to monitor. if the pressure drops, then you know what it means

 

how will thicker oil cause a oil pump failure?

10w40 isnt that much thicker than 10w30....so if you have a oil pump failure its from something else.

 

yeah i spun a rod bearing.

 

I'm running ACLs, I have a stock Y7 oil pump and run 20w-50

 

thats why i ran honda bearings , so much easier to dial in the clearances. but 10w40 oil should be perfectly fine.