1.8L SOHC intake port - First Generation Forum

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1.8L SOHC intake port
Tuesday, May 19, 2015 11:45 AM
Does anyone have a 1.8 SOHC head that's off the car? I'd like a measurement of the intake port diameter if so, please. Thanks!


86 Skyhawk wagon 1.8SOHC 93 Sunbird two door 2.0SOHC 93 Sunbird four door 2.0SOHC

Re: 1.8L SOHC intake port
Tuesday, May 19, 2015 6:34 PM
I have one in the attic. I will have to look if nobody beats me to it.



Re: 1.8L SOHC intake port
Thursday, May 21, 2015 7:33 AM
Thanks, no rush if it's buried up there!


86 Skyhawk wagon 1.8SOHC 93 Sunbird two door 2.0SOHC 93 Sunbird four door 2.0SOHC
Re: 1.8L SOHC intake port
Wednesday, June 17, 2015 11:03 AM
Sorry to bug you, but had a chance to dig it out yet?


86 Skyhawk wagon 1.8SOHC 93 Sunbird two door 2.0SOHC 93 Sunbird four door 2.0SOHC
Re: 1.8L SOHC intake port
Thursday, June 18, 2015 12:05 AM
Here's the intake valve dimensions:

O Engine CODE; OHC; PONTIAC,HEAD DIA-1.61 LENGTH-4.19

Hope that helps.
Re: 1.8L SOHC intake port
Thursday, June 18, 2015 8:01 AM
I'm actually just looking for the diameter of the intake port at the beginning/face of the head where the intake mounts. Thank you, though!


86 Skyhawk wagon 1.8SOHC 93 Sunbird two door 2.0SOHC 93 Sunbird four door 2.0SOHC
Re: 1.8L SOHC intake port
Thursday, June 18, 2015 9:30 AM
I measured the inside diameter and it is 1.4063 inches or 35.72mm. I hope that helps..



Re: 1.8L SOHC intake port
Thursday, June 18, 2015 10:27 AM
Now is that an average of all four ports, or just one, and how sure are you of the accuracy of the 3 tenths ?

...just kidding, thank you for taking the time to measure that for me, I appreciate it!


86 Skyhawk wagon 1.8SOHC 93 Sunbird two door 2.0SOHC 93 Sunbird four door 2.0SOHC
Re: 1.8L SOHC intake port
Thursday, June 18, 2015 10:34 AM
I measured the 2 center ports With a metal tape twice in inches and converted to mm. I did not use a micrometer.



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