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![]() | SBC CHEVY HOWARDS HYD FLAT TAPPET CAM 110041-10 ONLY 468/488 LIFT | ![]() | ![]() | US $79.50 | 10d 2h 16m |
![]() | Erson Camshaft 351w 393 408 stroker mechanical flat tappet custom grind | ![]() | 0 Bid | US $120.00 | 1d 7h 49m |
![]() | NEW SMALL BLOCK FORD CAM 260 289 302 STOCK HYD CAMSHAFT S B SB FLAT TAPPET NR | ![]() | 0 Bid | US $19.99 | 2d 5h 53m |
![]() | Camshaft Chevy Small block sbc GM performance CAM Hydraulic Flat Tappet NEW | ![]() | 0 Bid | US $40.00 | 2d 11h 9m |
![]() | Lunati SBC CHEVY 07102 Hyd. Flat Tappet Camshaft 285/285 507/507 | ![]() | 4 Bids | US $20.50 | 2d 21h 22m |
![]() | Lunati Big Mopar 60305 Hyd.Flat Tappet Camshaft 287/297 Chrysler Dodge Plymouth | ![]() | 0 Bid | US $49.05 | 2d 21h 28m |
![]() | SBC Solid Lifter Flat Tappet Camshaft .531/.542 Lift | ![]() | ![]() | US $69.99 | 9d 21h 30m |
![]() | small block chevy 327 350 400 gm camshaft offroad mushroom flat tappet nascar | ![]() | ![]() | US $375.00 | 2d 22h 19m |
![]() | Lunati Hydraulic Roller Tappet Camshaft Ford SB 289 302 351W .600"/.600" Lift | ![]() | ![]() | US $302.90 | 20d 12h 20m |
![]() | SBC CHEVY HOWARDS HYD FLAT TAPPET CAM 110051-10 ONLY | ![]() | ![]() | US $89.50 | 22d 2h 1m |
![]() | Briggs & Stratton Used horizontal 5hp 211117 camshaft, (2) 260642 tappets | ![]() | ![]() | US $5.00 | 3d 21h 2m |
![]() | NOS FORD HYDRAULIC LIFTER CAMSHAFT VALVE TAPPET 2.0L 2.3L 2.5L MAZDA 2.3L | ![]() | ![]() | US $14.50 | 4d 1h 30m |
![]() | GM Performance Hydraulic Flat Tappet Camshaft 3896962 | ![]() | 1 Bid | US $40.00 | 4d 3h 35m |
![]() | Isky Camshaft, Mechanical Flat Tappet Ford 292 312 272 | ![]() | ![]() | US $169.99 | 17d 2h 25m |
![]() | Comp Cams Ford 2000cc 2300cc 4-Cylinder Hyd Flat Tappet Camshaft #70-123-6 | ![]() | ![]() | US $126.99 | 19d 38m |
![]() | Isky Oval Track Hydraulic Flat Tappet Camshaft Chevy SBC .490"/.490" 201274 | ![]() | ![]() | US $147.90 | 16d 11h 14m |
![]() | SB Chevy Hydraulic Flat Tappet Cam Camshaft - Howard's #110051-10 | ![]() | ![]() | US $89.50 | 17d 20h 14m |
![]() | Crane Mechanical Flat Tappet Camshaft Chevy BBC 396 454 .560"/.580" Lift | ![]() | ![]() | US $158.15 | 9d 12h 26m |
![]() | Kawasaki GPZ900R Cam FollowerGPZ 900R GPZ900 900 R Camshaft Tappet Adjuster | ![]() | ![]() | US $22.10 | 29d 22h 4m |
![]() | CAM BB CHEVY 396 454 HYDRAULIC FLAT TAPPET ECONOMY CAMSHAFT | ![]() | ![]() | US $43.68 | 29d 21h 47m |
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Tappet Camshafts

what causes low oil pressure and knocking sound on a Nissan RD28 turbo engine?
The engine is a turbo charged over-head cam with hydraulic tappets. I changed two exhaust valves and the camshaft after a timing failure. After that there is a knocking sound and the car has no power. The turbine thing in the turbo charger doesn't rotate either way. the engine doesn't rev up more than 2400rpm and it also overheats easily. what causes these things?
Dear Nissan-
I hate to be the one to break this to you, and its news that you are not going to want to hear.
The reason the turbo will not spin is because the bearings in the turbo have cooked and seized the turbo charger. This may have happened due to the low oil pressure. Ths indicates to me that the Oil Pump has failed or a critical seal in the system has failed.
As for the knocking sound, I will also wager that you may have spun an engine bearing in the process.
Automotive 101:
Turbo Chargers are operated by the hot exhaust gasses exiting the engine. These gasses flow by the turbine vanes which is connected via a shaft to the compressor vanes that create the boost for the Turbo Charger.
Since the timing failure due to a Timing Belt snapping or the belt cogs being stripped off, (if equipped) the engine jumped time and the valves smacked the top of the piston. The same will happen if a timing chain jumps time due to a sproket failure, chain failure, or tensioner failure. This destructive energy is passed through the connecting rod and directly to the crankshaft where the bearing was probably damaged, and it has probably spun in the journal cradle and wiped out the journal on the crank.
In the process you have also probably cracked the cylinder head too, and this is part of the reason for the overheating, but that can be due to the fact the Turbo Charger is now trash.
You are now looking at a major bill to return the car to operating condition.
I can tell you from experince that Turbo Chargers require a delecate hand, and knowledge of how to care for them. Frequent oil changes are their friend, (Every 3000 miles without exception).
Turbo Chargers also require a stabilazation time after driving before engine shut down too. The harder the Turbo Charger has been working, the longer it will need to cool down before the engine can be turned off. 5 to 8 minutes of engine idle time may be required. This prevents the oil from cokeing in the bearings in the Turbo Charger.
This is why when you see small aircraft come in at the airport, they pilots will leave the engines running for 5 minutes or more before they shut the engine down. They are allowing the turbo chargers to cool before they return to ambient temprature.
Diesel trucks, trains, construction equipment all follow the same procedure for shut-down to allow the turbos to cool off.
In your case, I would say this is also true, compunded by the timing failure, you are now looking at a very expensive repair. more than likely its going to cost you more than the car is worth.
Nissan like Toyota subcontracts for their Turbo Chargers, to another company. I think theirs are made my Mitsubishi. Just the Turbo Charger alone is going to cost you from $1200.00 to $2000.00+ depending on the type of Turbo it is, and you have not even got to the engine repairs yet, which is going to be near $3000.00+ just to get started, if the block can be saved. If not just keep adding the numbers until they hit about $8000.00.
This is one reason I do not build imports once they have been destroyed. The parts replacement costs are too prohibitive.
I always hate bad news like this, because I enjoy building custom cars regardless of the brand name.
Here is my point.
My brother owns a 1990 Honda Prelude 2.5L DOHC SI Special Edition, (Grey Market Import). Because of the rarety and the fact this particular configuration was only available in Japan, it cost us $21,950 to customize and Rod this vehicle. All of the parts had to come from overseas, and Spoon Engines was the only people willing to do the re-manufacturing work for us.
Was it worth it? Yes! But that is because the intrinsic value of the car outweighs the Blue Book. My brother has had offers up to $50K for this car. Its not for sale. With a 276 Hp 4 cylinder DOHC Engine, you can understand why.
Sorry fo the news! I hope you can get it repaired, but if not I am sorry anyway! Good Luck!
![]() |
![]() | SBC CHEVY HOWARDS HYD FLAT TAPPET CAM 110041-10 ONLY 468/488 LIFT | ![]() | ![]() | US $79.50 | 10d 2h 16m |
![]() | Erson Camshaft 351w 393 408 stroker mechanical flat tappet custom grind | ![]() | 0 Bid | US $120.00 | 1d 7h 49m |
![]() | NEW SMALL BLOCK FORD CAM 260 289 302 STOCK HYD CAMSHAFT S B SB FLAT TAPPET NR | ![]() | 0 Bid | US $19.99 | 2d 5h 53m |
![]() | Camshaft Chevy Small block sbc GM performance CAM Hydraulic Flat Tappet NEW | ![]() | 0 Bid | US $40.00 | 2d 11h 9m |
![]() | Lunati SBC CHEVY 07102 Hyd. Flat Tappet Camshaft 285/285 507/507 | ![]() | 4 Bids | US $20.50 | 2d 21h 22m |
![]() | Lunati Big Mopar 60305 Hyd.Flat Tappet Camshaft 287/297 Chrysler Dodge Plymouth | ![]() | 0 Bid | US $49.05 | 2d 21h 28m |
![]() | SBC Solid Lifter Flat Tappet Camshaft .531/.542 Lift | ![]() | ![]() | US $69.99 | 9d 21h 30m |
![]() | small block chevy 327 350 400 gm camshaft offroad mushroom flat tappet nascar | ![]() | ![]() | US $375.00 | 2d 22h 19m |
![]() | Lunati Hydraulic Roller Tappet Camshaft Ford SB 289 302 351W .600"/.600" Lift | ![]() | ![]() | US $302.90 | 20d 12h 20m |
![]() | SBC CHEVY HOWARDS HYD FLAT TAPPET CAM 110051-10 ONLY | ![]() | ![]() | US $89.50 | 22d 2h 1m |
![]() | Briggs & Stratton Used horizontal 5hp 211117 camshaft, (2) 260642 tappets | ![]() | ![]() | US $5.00 | 3d 21h 2m |
![]() | NOS FORD HYDRAULIC LIFTER CAMSHAFT VALVE TAPPET 2.0L 2.3L 2.5L MAZDA 2.3L | ![]() | ![]() | US $14.50 | 4d 1h 30m |
![]() | GM Performance Hydraulic Flat Tappet Camshaft 3896962 | ![]() | 1 Bid | US $40.00 | 4d 3h 35m |
![]() | Isky Camshaft, Mechanical Flat Tappet Ford 292 312 272 | ![]() | ![]() | US $169.99 | 17d 2h 25m |
![]() | Comp Cams Ford 2000cc 2300cc 4-Cylinder Hyd Flat Tappet Camshaft #70-123-6 | ![]() | ![]() | US $126.99 | 19d 38m |
![]() | Isky Oval Track Hydraulic Flat Tappet Camshaft Chevy SBC .490"/.490" 201274 | ![]() | ![]() | US $147.90 | 16d 11h 14m |
![]() | SB Chevy Hydraulic Flat Tappet Cam Camshaft - Howard's #110051-10 | ![]() | ![]() | US $89.50 | 17d 20h 14m |
![]() | Crane Mechanical Flat Tappet Camshaft Chevy BBC 396 454 .560"/.580" Lift | ![]() | ![]() | US $158.15 | 9d 12h 26m |
![]() | Kawasaki GPZ900R Cam FollowerGPZ 900R GPZ900 900 R Camshaft Tappet Adjuster | ![]() | ![]() | US $22.10 | 29d 22h 4m |
![]() | CAM BB CHEVY 396 454 HYDRAULIC FLAT TAPPET ECONOMY CAMSHAFT | ![]() | ![]() | US $43.68 | 29d 21h 47m |
![]() | Ford Racing - V8 HYDRAULIC ROLLER TAPPET CAMSHAFTS Z303 | ![]() | US $348.95 | 29d 18h 36m |
![]() | COMP CAMS Chrysler 20-246-4 Magnum Flat Tappet Camshaft | ![]() | ![]() | US $125.00 | 29d 15h 18m |
![]() | TRIUMPH CAMSHAFT TAPPETS T100T T100R DAYTONA 70-4040 | ![]() | ![]() | US $122.78 | 29d 12h 41m |
![]() | Lunati Solid Roller Tappet Camshaft Solid Roller Ford SB 289 302 351W 50616 | ![]() | ![]() | US $342.64 | 29d 12h 21m |
![]() | Isky Oval Track Solid Flat Tappet Camshaft Solid Chevy Straight Six 231526 | ![]() | ![]() | US $191.90 | 29d 12h 1m |
![]() | Lunati Hydraulic Roller Tappet Camshaft Chevy SBC 327 350 400 .535"/.550" Lift | ![]() | ![]() | US $304.90 | 29d 11h 42m |
![]() | Isky Solid Flat Tappet Camshaft Solid Chevy Straight Six .591"/.591" Lift | ![]() | ![]() | US $191.90 | 29d 11h 41m |
![]() | Lunati Solid Flat Tappet Camshaft Solid Chevy BBC 396 454 .586"/.600" Lift | ![]() | ![]() | US $197.64 | 29d 11h 41m |
![]() | Isky Oval Track Hydraulic Flat Tappet Camshaft Chevy SBC .390"/.410" 201SL2 | ![]() | ![]() | US $171.90 | 29d 11h 40m |
![]() | COMP Cams Thumpr Hydraulic Flat Tappet Camshaft Mopar SB LA 318 360 20-602-4 | ![]() | ![]() | US $156.94 | 29d 11h 40m |
![]() | HONDA XL250R CAMSHAFT 84 HONDA XL250R CAMSHAFT 85 HONDA XL250 TAPPETS | ![]() | ![]() | US $100.00 | 29d 8h 21m |
![]() | Comp Cams CL12-679-5 Xtreme Energy XS290S Mechanical Flat Tappet Camshaft Kit | ![]() | ![]() | US $281.99 | 29d 4h 20m |
![]() | Comp Cams 11-236-4 Xtreme Marine XM270H Hydraulic Flat Tappet Camshaft | ![]() | ![]() | US $139.99 | 29d 55m |
![]() | Comp Cams CL35-330-3 Magnum 292H Hydraulic Flat Tappet Camshaft & Lifter Kit | ![]() | ![]() | US $201.99 | 28d 23h 15m |
![]() | Comp Cams CL42-231-4 Magnum 280H Mechanical Flat Tappet Camshaft & Lifter Kit | ![]() | ![]() | US $211.99 | 28d 20h 4m |
![]() | Comp Cams 12-107-3 Mechanical Flat Tappet Camshaft SB | ![]() | ![]() | US $131.99 | 28d 19h |
![]() | Crane Cams 100052 Flat Tappet Camshaft & Lifter Kit | ![]() | ![]() | US $209.99 | 28d 19h |
![]() | Crane Cams 100072 Flat Tappet Camshaft & Lifter Kit | ![]() | ![]() | US $209.99 | 28d 19h |
![]() | JEGS 200000 Hydraulic Flat Tappet Camshaft Only JEGS | ![]() | ![]() | US $55.99 | 28d 18h 59m |
![]() | JEGS 200009 Hydraulic Flat Tappet Camshaft Only JEGS | ![]() | ![]() | US $65.99 | 28d 18h 59m |
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My 383 Silverado motor swap
Hey Jeepers, Do you know about ZDDP?
Anyone with a 4.0 motor needs to read this!! The flat tappet camshaft on a 4.0 requires ZDDP (zinc) for wear protection and nearly ALL oil companies have removed Zinc from their oil because newer cars have roller cams and zinc was causing premature cat failure. Many Jeepers including myself have been running Rotella T 15w 40. It's cheap and has the 1100ppm ZDDP that our beloved straight sixes need. There are a few other Oils out there that have Zinc and also some additives but the Rotella seems to be the cheapest. Just thought I would share this so we can keep our jeeps running strong!!!!
interesting info thanks! I have the Inline 6 in my 87 Yj, so i'll keep this in mind!
Tags: flat tappet camshafts · tappet · tappet camshaftsNo Comments












































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