Author Topic: DZ302 motor spark plugs & cam replace  (Read 1586 times)

69ZX77MP

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DZ302 motor spark plugs & cam replace
« on: March 30, 2012, 01:27:27 AM »
Hi guys i have a stock 69 dzmotor.  What spark plugs are you guys using cant find r43 any suggestions. Also what oil are u using. im also going to replace cam .springs lifters pushrods any ideas  thanks for your help
1969 Z28 X77 Lemans Blue 03D

JohnZ

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Re: DZ302 motor spark plugs & cam replace
« Reply #1 on: March 30, 2012, 05:57:11 PM »
Hi guys i have a stock 69 dzmotor.  What spark plugs are you guys using cant find r43 any suggestions. Also what oil are u using. im also going to replace cam .springs lifters pushrods any ideas  thanks for your help

43's are way too cold for normal street use anyway; I run AC 45's (R45S) in mine - that same heat range equivalent (Autolite 86, Champion RJ14YC, etc.) in any other plug will work fine too. If you have the OEM "30-30" cam and stock valve springs, any CJ-4-rated diesel oil (like Shell Rotella, Mobil Delvac, Chevron Delo, etc.) has adequate ZDDP; the brand doesn't matter, as long as the API Service Category is CJ-4. If you go with an aftermarket cam and stronger valve springs, you'll need an additive or a ZDDP-fortified oil like Brad Penn, etc.
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69ZX77MP

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Re: DZ302 motor spark plugs & cam replace
« Reply #2 on: March 30, 2012, 11:18:54 PM »
Thanks john for the info your great :o
1969 Z28 X77 Lemans Blue 03D

68camaroz28

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Re: DZ302 motor spark plugs & cam replace
« Reply #3 on: March 31, 2012, 11:14:29 AM »
I'm sure you have good reason to change much of the valve train (cam, lifters, etc.) but do your homework on cam break-in and what to do/not do if you are staying with an original type solid cam profile.
Could save you butt.... ;D
Chick
68 Z/28 NOR 01B Orig motor/trans/rear
69 Z/28 NOR 07A Orig Block & GM Cross-ram/carbs
69 L34 Rest. Nova Father/Son Car
69 L78 Surv Nova Purch 4/69 31K miles
67 L89 Corv Tribute
68 Corv 427/400 Orig motor
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R 68Z build- http://www.camaros.net/forums/showthread.php?t=182584

L78 steve

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Re: DZ302 motor spark plugs & cam replace
« Reply #4 on: March 31, 2012, 03:41:40 PM »
Hi guys i have a stock 69 dzmotor.  What spark plugs are you guys using cant find r43 any suggestions. Also what oil are u using. im also going to replace cam .springs lifters pushrods any ideas  thanks for your help

43's are way too cold for normal street use anyway; I run AC 45's (R45S) in mine - that same heat range equivalent (Autolite 86, Champion RJ14YC, etc.) in any other plug will work fine too. If you have the OEM "30-30" cam and stock valve springs, any CJ-4-rated diesel oil (like Shell Rotella, Mobil Delvac, Chevron Delo, etc.) has adequate ZDDP; the brand doesn't matter, as long as the API Service Category is CJ-4. If you go with an aftermarket cam and stronger valve springs, you'll need an additive or a ZDDP-fortified oil like Brad Penn, etc.

Are you sure these oils have the ZDDP? I heard the Diesel oils had the zinc dropped also.
69 Z/28 Dover White X33,ZL2,PS,M20,Std.int.04C
67 SS/RS Mt. Green 1W,2LGSR,3SL,4K,5BY,07C
70 Nova L78 Blk. Cherry,Sandalwood,M21,02B

PURESS

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Re: DZ302 motor spark plugs & cam replace
« Reply #5 on: March 31, 2012, 04:00:27 PM »

JohnZ

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Re: DZ302 motor spark plugs & cam replace
« Reply #6 on: March 31, 2012, 06:24:23 PM »
Hi guys i have a stock 69 dzmotor.  What spark plugs are you guys using cant find r43 any suggestions. Also what oil are u using. im also going to replace cam .springs lifters pushrods any ideas  thanks for your help

43's are way too cold for normal street use anyway; I run AC 45's (R45S) in mine - that same heat range equivalent (Autolite 86, Champion RJ14YC, etc.) in any other plug will work fine too. If you have the OEM "30-30" cam and stock valve springs, any CJ-4-rated diesel oil (like Shell Rotella, Mobil Delvac, Chevron Delo, etc.) has adequate ZDDP; the brand doesn't matter, as long as the API Service Category is CJ-4. If you go with an aftermarket cam and stronger valve springs, you'll need an additive or a ZDDP-fortified oil like Brad Penn, etc.

Are you sure these oils have the ZDDP? I heard the Diesel oils had the zinc dropped also.

Yes. The CJ-4 oils consistently test at 1100-1200 ppm zinc/phos; the older CI-4 oils were slightly higher (1200-1300). If you have an OEM valvetrain, that's all you need; with more radical aftermarket lobe profiles and Gonzo valve springs, it's a whole different ball game.
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69z28302

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Re: DZ302 motor spark plugs & cam replace
« Reply #7 on: April 05, 2012, 01:00:18 AM »
I just bought a case of gallon's 15-40 Kendell CI . Cant hardly find it anywhere. The place where I bought  keep it for the People who run the Older Diesel engine's.

MM