Subject	The TSB is inside the link you provided...more info>
Posted by	cainmt (Toledo,OH) on September 30, 2004 at 5:24 PM
	This message has been viewed 63 times.
In Reply To	Re:??? posted by Angry Z on September 30, 2004 at 11:37 AM
Message	This left head problem is actually more subtle than many would think. The hesitation is liveable for a long time, but will bother anal people like myself. It will rear its head as light spark knock between 2500-3000 RPM. My wife didn't even notice it, but I could hear it and "feel" it. It happens very slowly over time. If you get up and go most of the time and keep up your RPM, you won't notice it as much as if when you are driving normally. Nissan issued a new part # for the left head for the '91 models. This is where I challenge anyone that says the problem didn't affect all '90 cars. I made many calls to Nissan corporate trying to figure out the VIN range when I first found the TSB. Finally, I got someone on the line that sat on phone with me and helped break down the VIN ranges, character by character, number by number. After we were done, we were both certain that all '90 were affected. They had nothing to lose as the car is not under warranty anymore and getting a judge to force a recall on a '90 is joke at this stage of the game. Why do some '90 cars last longer than others before the problem surfaces or becomes so bad that it is no longer not just as subtle nuisance? -Driving preferences and conditions. Some beat their cars, some don't. -Some have a lot of highway miles and take a lot less of a beating on the CAS/camshaft connection. -Many '90 cars have rebuilt motors and/or heads. These cars are 15 years old now and many owners don't know what has been done to their cars before they bought it. -Many '90 cars have replaced the CAS and keep prolonging the problem. -Some '90 cars have aftermarket cams or have replaced the cams. This is a great less-inexpensive way to prolong the problem. Basically, you are back to ground zero and are starting over again after the left exhaust cam is replaced. -The CAS is lubricated when it is taken off and put back on. This prolongs the breakdown of the camshaft spline. -Many actually experience the problem and don't realize it. ----------------------------------------------------------- 1990 300zx NA coupe, 5 sp., Aztec red 2003 Subaru Impreza RS 2003 VW Jetta Wagon, 1.8T (great sleeper, great grocery getter!) mike_cain@buckeye-express.com
Follow Ups	Is This true about all 90Z's? - Bouncer068 08:47:15 09/30/04 My NA has 96k and i have had no problems with the heads (n/m) - Atl300zxTT 08:50:31 09/30/04 105K on my '90 TT - no problems of that type. (n/m) - Dave N 08:50:47 09/30/04 driver error, loose nuts, the list goes on (n/m) - JDMz32smity 08:57:38 09/30/04 You must be thinking of Tony, aka BigTDogg, aka loose nutz - Dave N 09:29:42 09/30/04 My 2+2 has 187k miles and i've got no signs of problems (n/m) - jkperformance 09:05:04 09/30/04 The early production 90 Zs had a problem with soft valve - Jonezy 09:05:27 09/30/04 True, but most if not all of these Z's are already fixed or - FlawleZ 09:31:37 09/30/04 193k and running strong... - fantomZ(OH) 09:06:57 09/30/04 oh yeah, and mine was actually produced in 89 (n/m) - fantomZ(OH) 09:12:26 09/30/04 Most of the 90's have 89 production dates. (n/m) - FlawleZ 09:30:13 09/30/04 mine was produced in May of 90 and I've had no problems. (n/m) - doug8867 10:30:28 09/30/04 2nd: Production date 7/89, serial #786 for mine. (n/m) - Dave N 09:30:18 09/30/04 pfft, February 89, S/N 000028 here :-) (n/m) - ZEngineer (TT) 10:28:59 09/30/04 But that's for the chassis, you ripped out the motor - Dave N 12:23:47 09/30/04 way to piss on my parade.....jerk :-( (n/m) - ZEngineer (TT) 12:40:42 09/30/04 i had 155k on the first z... no problems (n/m) - halik 09:29:56 09/30/04 I'm told it's true.... and it happened to me - Angry Z 10:45:09 09/30/04 ??? - Guapo 10:54:59 09/30/04 Re:??? - Angry Z 11:37:09 09/30/04 if motors are lasting to 190k I'd hardly call it a problem. (n/m) - Guapo 11:52:52 09/30/04 12/89 build date.. no head problems (n/m) - 90BlkZ18 12:23:10 09/30/04 The TSB is inside the link you provided...more info> - cainmt (Toledo,OH) 17:24:15 09/30/04 Nope...my head is great. (n/m) - Milo (Sport Z Magazine) 12:22:22 09/30/04 I think a more correct statement would be - KaZ (VaBch) 14:23:47 09/30/04 90 TT ran 256,000 miles before pass. side headgasket leak (n/m) - Fly-Surf 14:46:01 09/30/04 Re: Is This true about all 90Z's? - Bouncer068 17:20:02 09/30/04 read my post above, good luck. (n/m) - cainmt (Toledo,OH) 17:26:11 09/30/04
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