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Old Today, 12:50 AM   #1
Serywil10
 
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Default Couple of questions about the 2.4

I have an 86 d21 2.4. Was gonna do plugs and wires, but read somewhere that it takes two different style plugs. 4 of one, 4 of the other. Anyone got part numbers for plugs and wires they would suggest for this? And also, this truck has 2 holes in the valve cover, where it appears the air cleaner was bolted down, but the inserts and bolts are gone. Just 2 dime sized holes in my valve cover. I'm assuming I'll need a new valve cover? Thanks.
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Old Today, 01:40 AM   #2
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Yes the z24i uses 4 intake plugs and 4 exhaust plugs. If you search them for your vehicle on an auto parts website they will indicate in the parts description which are which.

I use NGK # 7084 on the intake and # 7082 on the exhaust.

And for those holes: The air cleaner does bolt down to the valve cover. You will just need to find those bolts unless the threads are gone.
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Old Today, 01:47 AM   #3
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Oh and I use NGK wires # 9998. They are pretty spendy though. I was lucky and found a set at a junkyard for $1 per wire.
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Old Today, 02:08 AM   #4
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Yeah, the threads are missing. Like, turn out jagged hole missing. Thanks for the part numbers!
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Old Today, 02:51 AM   #5
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Originally Posted by 88D21503 View Post
Oh and I use NGK wires # 9998. They are pretty spendy though. I was lucky and found a set at a junkyard for $1 per wire.
Denso wires are a good alternative. They are also made in Japan and are the OEM for Toyota and Honda and probably some others too. I looked at the NGKs but ended up going with the denso set because it was roughly half the cost. I only have 4 plugs to worry about but I imagine it would be similar for the Z24 guys.
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Old Today, 03:26 AM   #6
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I believe my VG33 had denso on it when I got. I'd still go NGK. Price is reasonable at places like rock auto.
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Old Today, 05:04 AM   #7
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I agree about Denso. We have a 2005 Corolla and I use Denso plugs and have replaced a few sensors and only used Denso. I do try to stick with NGK for my Nissan but I never would have bought those NGK plug wires at retail price.

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Denso wires are a good alternative. They are also made in Japan and are the OEM for Toyota and Honda and probably some others too. I looked at the NGKs but ended up going with the denso set because it was roughly half the cost. I only have 4 plugs to worry about but I imagine it would be similar for the Z24 guys.
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Old Today, 05:43 AM   #8
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I agree about Denso. We have a 2005 Corolla and I use Denso plugs and have replaced a few sensors and only used Denso. I do try to stick with NGK for my Nissan but I never would have bought those NGK plug wires at retail price.
Same here. I have a 1999 camry myself and denso is all I use for sensors and electronics. I usually run NGK plugs in everything unless it's considerably more expensive. I'm going on a bit of a tangent here but as you probably know most Toyota engines call for dual-tip platinum spark plugs which aren't super cheap. When I changed the plugs and wires in the car I went with denso simply because the plugs were $5 vs $8 for the NGKs, and they are the OEM plugs anyways. For the truck the denso wires were around $15 vs. almost $40 for the NGKs. On that same note I'm also a huge fan of Aisin products for water pumps and hydraulic components, I actually have an Aisin water pump in the truck simply because it was about half the cost of an OEM Hitachi one. It's probably worth mentioning that these are internet prices, I can't imagine what the parts store would ask for them.
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