zuzzzi Posted March 4, 2007 Report Share Posted March 4, 2007 Hi, i saw in the Manual, that i dont fill 10W40 in the 1992 4,9 L Engine. I don´t know, you are remeber, i have change the Engine, and fill in 10W40. Now the Problem is, that the Lifters knock for a few secounds, when i start the engine. So i think the Problem is the 10W40, or the Oil Filter (there is a K&N Oilfilter in the Engine). What is the best Oil for this Engine? And what is with Konocking Lifters? Best Regards Marco Link to comment Share on other sites More sharing options...
GreenMachine Posted March 4, 2007 Report Share Posted March 4, 2007 10w-30 is what its spec' says if memory serves me right. The Green's Machines 1998 Deville - high mileage, keeps on going, custom cat-back exhaust 2003 Seville - stock low mileage goodness! 2004 Grand Prix GTP CompG - Smaller supercharger pulley, Ported Exhaust Manifolds, Dyno tune, etc 1998 Firebird Formula - 408 LQ9 Stroker motor swap and all sorts of go fast stuff Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 4, 2007 Report Share Posted March 4, 2007 The guru recommends that we use the 15W40 version of the Rotella/Delvac/Delo in the 4.9 as a result of the wearing surfaces and the distributor gear...and the number one main bearing knock.... Read this thread over regarding the decrease in ZDDP in the ILSAC GF-4 oils available today. Those oils with reduced ZDDP are not too good for your 4.9 and my 96 NS with flat tappets.... I just used 10W40 in my 96 Deville on my last oil change due to it NOT having reduced ZDDP. I will NOT leave it in long and will do either 1) Use 10W30 and spike it with GM EOS or 2) use 15W40 or 10W30 version of the Rotella/Delvac/Delo...... I will not use the ILSAC GF-4 oils in ANY flat tappet NS...that is the reason I am looking for a NS with roller tappets (started in 2000?)... for my next car..... Read the whole thread regarding the decrease in ZDDP, BUT read the last few pages of it for sure.... http://www.cadillacforums.com/forums/north...-cars-long.html Furthermore, see this thread on oil, its pretty amazing: http://www.cadillacforums.com/forums/north...api-grades.html Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
Caddynut Posted March 4, 2007 Report Share Posted March 4, 2007 I use 10-40 in my '92 4.9. cuts down a lot on the main bearing knock, plus....if you have some miles....the thicker hot viscocity (40 weight) will fill in those wear markes and larger gaps. 2008 BMW 328xi 2007 Chrysler Aspen 2001 Cadillac Seville STS 2000 Ford Ranger XLT1998 Mitsubishi Spyder Convertible 1996 Saturn SC-11991 Ford F-1501979 Chevrolet Caprice1968 Ford LTD1965 VW Beetle "Herbie The Love Bug Replica** 1961 VW Beetle Link to comment Share on other sites More sharing options...
JasonA Posted March 5, 2007 Report Share Posted March 5, 2007 use 15W40 or 10W30 version of the Rotella/Delvac/Delo...... I will not use the ILSAC GF-4 oils in ANY flat tappet NS...that is the reason I am looking for a NS with roller tappets (started in 2000?)... for my next car..... I didn't know Rotella/Delvac/Delo was available in 10W-30. Interesting! Yes, the model year 2000 was the debut for the "2nd generation" Northstar with roller tappets, among other changes. Jason(2001 STS, White Diamond) "When you turn your car on...does it return the favor?" Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 5, 2007 Report Share Posted March 5, 2007 Jason, if you check out those links, I think clarkz and chevelle state that is comes in 10W30..... I will be hunting down a few cases of it! Thanks for the info on the roller tappets.... Photo credit - JimD! Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
JasonA Posted March 5, 2007 Report Share Posted March 5, 2007 I will say, there is a barely perceptible improvement in smoothness between my '97 engine and my '01 engine. That could also be a difference in the vehicle also. The biggest difference I've seen so far is the slightly cheaper regular (87 octane) fuel; my '97 doesn't like regular fuel. Jason(2001 STS, White Diamond) "When you turn your car on...does it return the favor?" Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 5, 2007 Report Share Posted March 5, 2007 Given that you have the 300 HP version, I would think that you would feel the hopped up CAM that provides the 300 HP version with its added HP.... The guru used to say that at idle it had a lope..... I like that... I just got back from WALMART and they had Rotella T 15W40 and straight 30W and Mobil Delvac 15W40 but no 10W30..... I will keep looking... Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
JasonA Posted March 5, 2007 Report Share Posted March 5, 2007 Given that you have the 300 HP version, I would think that you would feel the hopped up CAM that provides the 300 HP version with its added HP.... The guru used to say that at idle it had a lope..... I like that... I think that was the earlier generation (before roller tappets). This one is pretty smooth, no matter the engine speed. Jason(2001 STS, White Diamond) "When you turn your car on...does it return the favor?" Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.