For hard-core use, Oceanside Transmissions can build you a normal lockup converter, as well as beef up the output shaft, planetaries, sprags, clutch plates, and valvebody. These cookies do not store any personal information. At the same time, Japanese rivals Toyota and Nissan sent forth their luxury brands Lexus and Infinity to heat up the competition. GM Northstar 4.6L V8 Engine By Engine Builder on Jun 11, 2010 Initially rated at 295 horsepower, the Northstar V8 has grown over the years to an incredible 469 hp at 6,400 rpm (STS-V Supercharged Northstar engine). 1994 - 2002 Northstar LD8; 2004 - 2005 Northstar LH2; 2006 - 2009 Northstar LC3; Is the 4.6 Northstar a LS engine? This encompasses all the two-wheel-drive S-trucks through '85. This 4.4L Supercharged, Intercooled Northstar made 443 hp in the XLR-V, and 469 hp in the STS-V. From its introduction as a 270hp engine to its final bow in 320 hp VVT Rear-wheel drive form, to Supercharged, intercooled, 4.4L 469 hp form in the STS-V from 2006-2009, the Northstar has delivered driving excitement. The Northstar engine was originally designed for the Cadillac. 8 header pipe glows orange-hot after running for a while. The usual symptoms of head gasket failure, such as the radiator constantly needing to be topped up with water, or plumes of smoke coming from the exhaust, are not always apparent. . It may be necessary to recurve the distributor. The LD8 engine is a transverse V8 for front-wheel drive cars that were first introduced in 1994 and designed to provide more torque than the L37. Farmington, CT, While it's more than likely that a typical 383 will prefer long-tube headers over shorties, it isn't a cut-and-dried issue. They prepared a checklist of changes which they decided to incorporate into new models. The Northstar engine comprises a cast aluminum 90 V8 block, with a 102 mm bore spacing split into unitary upper and lower halves. 5. Original '68-and earlier balancers have a different timing mark location than '69-and-later balancers. Sign up to receive the latest and greatest articles from our site automatically each week (give or take)right to your inbox. Jun 17, 2014 (Edited by Moderator) I've read on this forum that GM somewhat addressed the headgasket issue in year 2000 and revamped the headbolts around 2005, so I assume all the Northstar-equipped vehicles from 2005 and beyond should resist the headgasket issue much better than the . Looking at your timing issue: First, some digital timing lights (especially the dial-back kind) are adversely affected by high-output ignition systems like the MSD. Necessary cookies are absolutely essential for the website to function properly. 760/451-8796 But opting out of some of these cookies may have an effect on your browsing experience. Beyond that, custom Arias forged pistons are available through CHRF. However, in 2004, it was modified for the rear-wheel and all-wheel drive STS, SRX, and XLR models of Cadillac. Santa Ana, CA I'd be looking at around 34 to 36 degrees total timing. Also compare the spark plugs from all the cylinders. Guess that would rule out the no HG theory. Canada; Choose RE cam, LE cam or both. In the case of the STS, only a different battery cable was required to enable the LH2 to bolt into an STS. Coat a new oil seal and the crankshaft with a light film of engine oil. While all the previous versions of the Northstar engine were naturally aspirated, the LC3 came with supercharging. This occurs more often with the iron drums than with the aluminum ones. if you would see our order list you would see. One of the HID headlights had to have a ballast replaced. "If you have a stock torque converter stall speed and are missing low-speed power, long tubes could help. These were the highest figures that the Cadillac had ever produced. I plan on purchasing a 2005+ model STS, and I wanted to know if these models have known problems before I buy one. Pasted as rich text. General Motors Cadillac division of cars has always been associated with luxury and class. 586/774-2500 You also have the option to opt-out of these cookies. The lower crank case assembly supports the crankshaft without the conventional main bearing caps. This is an interference engine having bronze pin bushings and free-floating pins. On a dual-plane intake, if you have a carb problem, because of the divided plenum, it would tend to affect at least four cylinders. GM later was able to fix this issue by developing a rear oil-seal that pressed into the block. Also, I'm running the Edelbrock RPM Air-Gap intake. The design . Also, a 4.0 lt L47 V8 version was used in the Oldsmobile Arora, while a 3.5 lt LX5 V6 was used in the Oldsmobile Intrigue. After I set the timing with my light (vacuum hose pulled and plugged), the timing seems to wander, and after running for a little while, the engine starts to miss and backfire. Magnifying this issue is that repair of head gasket problems requires removal of the powertrain due to packaging, and so requires a very expensive fix. there is a couple 2000+ on waiting list right now to get done. 949/631-5120 www.bonnevilleforum.com/t233152/, Powertrain Control Solutions (PCS) If your H-body has vented front brake rotors (usually only '76 and later), the existing master cylinder and proportioning valve should be able to do the job. Your link has been automatically embedded. I ran a compression check to see if No. The Northstar engine was ranked as one of the 10 best engines in North America by Wards Auto World, consecutively for the year 1995, 1996, and 1997. So far so good traction does not engage for no reason since the mount was fixed. Reliability marks: 9 / 10: Comfort marks: 9 / 10: Running Costs (higher is cheaper) 7 / 10: Overall marks (average . They're OK up to the 150 to 200hp nitrous-shot level. Stay with the standard old GM clamp (PN 10096197). No matter how one looked at it, Cadillacs engine simply was no match to the European and Japanese models, and soon, GM started losing its precious luxury market share. Intake manifold bolts are susceptible to loosening causing vacuum leaks and trouble code(s); 8. Oceanside, CA GM developed a cleaning kit to solve this issue. 10. VVT has not been used on transverse, FWD Northstars due. There are some variations, so try to get everything off the same donor vehicle. Different camshafts and cam lobe profiles provided different power curves and very different driving characteristics. Caddy Northstar In the later years, more developments were made to the original Northstar design. yes 04+ with the 2.0 thread pitch helped alot!! For the larger 7.5-inch rear, 26-spline axles (Hollander 1310) from '82 to '93 two-wheel-drive S-trucks with the GM Corporate 7.5-inch 10-bolt will bolt in. I was wondering if the V8 Northstar engine 2005 and up models has the same issues as the earlier model V8 Northstar engines? You can convert a GM H-body (Vega, Monza, and clones) front end to accept five-lug wheels and associated larger brakes by changing to different steering knuckles (spindles), but it's not a direct bolt-in. As for running additional external coolant lines from the rpm intake's extra rear bungs up to the front crossover passage, in theory it should help equalize the front and rear cylinder and head combustion chamber temperatures. As LSA gets narrower, long-tube headers become more important to prevent reversion impulses from adversely affecting a consecutively firing cylinder on an adjacent tube. http://hollanderinterchange.net, NAPA (Genuine Parts Co. ) The factory pistons are a hypereutectic design with thin rings. Re: Ecotec 2.4 VVT Reliability. Their answer to the technological war-cries of the east was the Northstar engine. If the starting fluid test does not produce an idle-speed increase when sprayed on this fitting, you could still have a leak somewhere in the various vacuum lines attached to the port, or at the devices at the other end of the vacuum lines (defective power brake booster, power brake booster check-valve, or auto trans vacuum modulator, for example). I have almost 300K on my '05 and it runs real good. Vega Five-Lug Conversion Since GMs purchase of the company in 1909, Cadillac, through continuous technological advancements, has managed to establish itself as one of Americas most respected premier luxury car brands. Maximum overbore is 0.020 inch, but to save the block for future rebuilds, an initial 0.010-inch overbore is usually sufficient to clean up everything. Rumors are that the new Cadillac XTS, which will replace the DTS and STS, will not feature the Northstar. Among the most alluring of these was the new-generation dual overhead cam V8 engine, which was a direct challenge to the aluminum HT Overhead Valve (OHV) V8 that the Cadillac was using at the time. You must also install '75-'80 H-body lower ball joints. Northstar engine series. www.oceansidetransmissions.com, Pontiac Bonneville Forum; We'll match you with the Northstar engine that will blow you away. It was used in the Seville, DeVille, and Eldorado models of Cadillac, but was discontinued in 2001 in favor of an air-cooled setup, owing to complaints of leaks. The Seville SLS model actually came with the RPO LD8 (VIN Y) Northstar. If it's a fuel problem, look for a plugged jet in the carb, other plugged passages, or improper calibration. s chassis at the Nurburgring hence the sigma platform overall I believe this car will be a future classic GM did the Northstar LH2 right compared to the . At the 100hp nitrous-shot level, altering the spark curve isn't necessary. For more information on this issue, see Pit Stop, Dec. '09, "Wacky Timing.". Trader Feedback. Any roller cam used in a Chevy small- or big-block that has no provisions for the late-model factory hydraulic roller cam installation and its factory thrust plate (this obviously includes your old 327) needs an antiwalk thrust button installed on the front of the camshaft nose and cam sprocket. They found a motor mount that had separated and thought that might have caused the problem. Upload or insert images from URL. Note that the Edelbrock RPM's main 1/2-NPT vacuum port is located in the No. The Northstar has a reputation, deserved or not, for headgasket issues after 100K miles. I have a 2007 STS We do not have a Cadillac dealer local, I bought the car used and it was great or the first year since I changed the tiresI constantly have a service tire monitor message, I have replace 3 of them that had low batteries I have taken thecar back to the tire place several times they check the tires the message goes away and after 20 miles it comes back on. Proform (Specialty Auto Parts USA Inc. ) If the line shifts out of alignment while the engine is running, the balancer is going away. After rebuilding the block and heads, is the aluminum going to lose its strength? In this test, the torque peak rpm moved up slightly and the power peak came down a tad, which might make a better track engine but would be less street-driveable. I have done a bit of research on the potential of this 4.6L engine, and the house is divided. Copyright 2022 Bruce W Nunnally Your engine falls into the '93 to '99 first generation. It's a design flaw that GM took WAY too long to even attempt to solve. The expensive, hand-built LC3 Supercharged Variant solved the performance issues, but was a boutique solution and not the main production powerplant upgrade needed. 17-inch OEM aluminum wheels are weak and susceptible to pothole damage in comparison to the 18-inch wheels. Rear differential bushing will eventually fail causing clunking sound, which means it must be replaced. After that, we have a better crank [as well as stroker kits].". Powered by Invision Community, Cadillac CT5, CTS, STS 2005+, 04-09 SRX, CTS Sport Wagon (Sigma). I have an 9000+ mile trip planned for late next spring/early summer. To reduce the weight, the cam covers are made up of magnesium. As for your smoking problem, it sounds like the valveguide seals need to be replaced. It is a DOHC 4.0 L; 243.8 cu in (3,995 cc) V8 which produced 250 hp (186 kW) and 260 lbft (353 Nm) of torque. Also peruse the FAQs on the www.h-body.org site. It would have been a V8 variant of the high-feature 3.6L engine, and so should have delivered over 385 hp. In total, the LH2 gained a five-percent power advantage over the FWD L37 Northstar. Huntsville, TX. Power steering pump is susceptible to failure (A pain to replace but a home mechanic can do the job); 3. Master cylinder actuating rod modifications may be needed. 2001 Seville STS, 1990 Seville (RIP), 1972 Sedan Deville. The Most Powerful Production Northstar The ultimate Northstar variant arrived in 2006 with the STS-V and the XLR-V performance cars. The blocks essentially split in half at the crankshaft centerline-the lower half acts like a huge, strong girdle with four bolts around each main. However, it is blown out of proportion. but didn't quite solve the problem. Check for vacuum leaks with the engine running using a can of starting fluid.
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