engine compression check on '86 truck - Pirate4x4.Com : 4x4 and Off-Road Forum

Arnold · 05-05-2004, 07:07 PM

A co-worker wants me to do a compression check on his '86 carbed 4 cylinder Nissan truck and I got a few questions. He told me it has 8 spark plugs which was a surprise to me. I've worked on Toyota and Chevy trucks but never touched a Nissan before. Do I pull all the plugs and test all 8 or only test certain ones? Anyone know the compression spec/range for that particular year engine. Thanks for any info.

XterraGuy · 05-06-2004, 06:45 AM

That would be the NapZ engine, they just put 2 plugs/cylinder in to try and clean up emissions. Just pull one plug per cylinder for compression checking, whichever is easier to get to.
Don't know the spec on 'em.

Arnold · 05-06-2004, 06:04 PM

Cool. Thanks.

larryboy · 05-07-2004, 07:34 AM

should have 170 psi for compression.

05-05-2004, 07:07 PM	#1 (permalink)
Arnold Registered User Join Date: Jul 2000 Member # 1246 Location: Granite Falls, WA Posts: 2,106	engine compression check on '86 truck A co-worker wants me to do a compression check on his '86 carbed 4 cylinder Nissan truck and I got a few questions. He told me it has 8 spark plugs which was a surprise to me. I've worked on Toyota and Chevy trucks but never touched a Nissan before. Do I pull all the plugs and test all 8 or only test certain ones? Anyone know the compression spec/range for that particular year engine. Thanks for any info.

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05-06-2004, 06:45 AM	#2 (permalink)
XterraGuy Registered User Join Date: Apr 2002 Member # 11064 Location: Columbia, MD Posts: 257	That would be the NapZ engine, they just put 2 plugs/cylinder in to try and clean up emissions. Just pull one plug per cylinder for compression checking, whichever is easier to get to. Don't know the spec on 'em.

05-06-2004, 06:04 PM	#3 (permalink)
Arnold Registered User Join Date: Jul 2000 Member # 1246 Location: Granite Falls, WA Posts: 2,106	Cool. Thanks.

05-07-2004, 07:34 AM	#4 (permalink)
larryboy Registered User Join Date: Jan 2002 Member # 9222 Location: uber alles,ca Posts: 2,886	should have 170 psi for compression.