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Lifetime Awesome Member
'89 CRX HF
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25,544 Posts
Discussion Starter #1
alright, when i disassembled my head i didnt bother marking which springs were intake and which were exhaust. they both looked the same, dimension wise, so i jut threw them all in a bag and called it good. now i come to reassemble the head, and some of the spring have yellow paint on them and some dont. according to hondaautomotiveparts.com, they are also different part #s....

which is intake, and which is exhaust? damn...

 

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D-series Janitor
Front Engine Dragste
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1,220 Posts
Hmm . . . mine off my PM6 head look exactly the same. Guess you need to find someone with a valve spring pressure tester . . . couldn't even guess which side would need more on the seat.

You do remember which side is top though right?
 

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Lifetime Awesome Member
'89 CRX HF
Joined
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25,544 Posts
Discussion Starter #6
well i pulled the VC off my spare a6, and the yellow ones were intakes.

measured them again(did it by eye the first time) and they were definately different

thanks guys :TU:
 

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Curious George
'99 LX Civic Sedan
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3,569 Posts
Any vtec intake springs are stronger than exhaust, core of coil bind is .018 beefer. It's where you can get something stronger maybe 10-15% even more if you put shim under but take really care to check coil binding when valve is wide open.

I put 2 set of 8 intake valve spring instead of y7 ones on both intake and exhaust, they are not longer but bigger core. I will try it with delta 282 shen I get it back from regrinding.
 
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