Reply to thread

See what others are reading now! Try Forums > Current Activity

Message: <blockquote data-quote="sakuraguy" data-source="post: 517009" data-attributes="member: 6441">http://cayotic.com/b16a_camshaft.jpgThese are camshafts. There are three cam lobes, which are the triangle type lumps in groups of three along the shaft. The thinner, shortest one is the primary lobe. The wider, medium high lobe is the secondary. The middle lobe (widest and biggest) is the VTEC lobe.Now, when your engine is running, these shafts are spinning. In this picture, you can see the engine head. Its off of a b18c1 (gs-r)http://cayotic.com/diagram.jpgyou can plainly see from left to right on the first group of cam lobes, Primary, VTEC, and Secondary(circled in red). The valves are under the two little flathead screws that are near the walls (circled in yellow) Under each cam lobe, you can see three things that resemble blocks. Those are the rocker arms (circled in green)http://cayotic.com/coveroff.jpgThe way the engine works is that the camshaft spins, and the lobes hit the rocker arms. the valves are connected to the rocker arms. so when the lobe hits, rocker arm is pushed down, and the other end that is attached to the valve is raised, therefore raising the valve. In this case the closer camshaft is the exhaust camshaft, so therefore the exhaust valves would be opened by the rocker arms. How does vtec work then? You can see that there is no valve under the VTEC rocker arm for the rocker arm to act upon. So when you are not in VTEC, the primary and secondary lobes are hitting the rocker arms, and the valves are working. But the VTEC rocker arm is just moving along, being pushed down by the VTEC lobe, but its not acting on anything. For VTEC to kick in, you need 2 things. 1) Engine must be in normal operating temperature - read: If you just turned on the car for the first time that day, vtec is not going to kick in. 2) Oil pressure must be up to par - read: if your oil pump is malfunctioning, or you have a low oil level, VTEC will not engage.Now, on this picture, the VTEC solenoid is circled below.http://cayotic.com/vtecsolenoid.jpgWhat that solenoid does is when oil and temp is optimal, it sends a pin thru each set of rocker arms. U can't see it in the pictures, but a pin slides thru a hole in each rocker arm, effectively linking all the rocker arms to move in unison.</blockquote>

Verification

The Marketplace Latest

Toyota Yaris 2019,White ,1.5L,6,082km
- Started by salesarena
- Cars for sale
original WedsSport SA70 18x9jj offset +32 5H pcd...
- Started by david tao
- Chassis and Wheels
BRAND NEW original rare Yokohama ADVAN Racing RG4...
- Started by david tao
- Chassis and Wheels
original rare Yokohama ADVAN Racing RZ2 RZii...
- Started by david tao
- Chassis and Wheels
original rare Yokohama ADVAN Racing RG 16x7jj...
- Started by david tao
- Chassis and Wheels
original rare Yokohama ADVAN Racing RG 16x7jj...
- Started by david tao
- Chassis and Wheels
original rare Rays Volk Racing TE37SL 18x9jj offset...
- Started by david tao
- Chassis and Wheels
Spoon Sw388 18x10J+40 5H120 Rim Rims Civic FL5 Type R
- Started by aycy
- Chassis and Wheels
Spoon Crane Neck Wing Carbon Spoiler GT Wing Honda...
- Started by aycy
- Exterior and Body
Honda Jazz/Fit GK Mugen body kit
- Started by jeff6126
- Exterior and Body

Posts refresh every 5 minutes

i'm looking for a 2004 reverse switch.. anybody can help with this?

i've tried with nissan but NO news from them. also tried several chop shops but seems to be a rare item...

i'm looking for a spare part - a reverse switch for AT 2004 model. anybody know how/where i can get 1? used...

1Sahar 3S-GTE running rich mixture?!

The defect and its symptom are:

1. Idle with black smoke.
2. Engine jerk when idling.
3. spark plug goes black and after replacement its ok for a while but later will be like running on 3 cyl.
4. Changed plug ...

ER34 rear wheel bearing

Am looking for a pair of rear wheel bearings for the ER34. Anyone know where I can source a unit. New or used is ok.

Many thanks.

Search

Enjoying Zerotohundred?

Log-in for an ad-less experience

Reply to thread

The Marketplace Latest

Toyota Yaris 2019,White ,1.5L,6,082km

original WedsSport SA70 18x9jj offset +32 5H pcd...

BRAND NEW original rare Yokohama ADVAN Racing RG4...

original rare Yokohama ADVAN Racing RZ2 RZii...

original rare Yokohama ADVAN Racing RG 16x7jj...

original rare Yokohama ADVAN Racing RG 16x7jj...

original rare Rays Volk Racing TE37SL 18x9jj offset...

Spoon Sw388 18x10J+40 5H120 Rim Rims Civic FL5 Type R

Spoon Crane Neck Wing Carbon Spoiler GT Wing Honda...

Honda Jazz/Fit GK Mugen body kit

Posts refresh every 5 minutes

Recent Posts

2026 Vios HEV launched with Local Battery Assembly - UMW Toyota Motor

SPPF: The Future of Automotive Surface Protection - A Technical Overview

Upping Wira 1.5 MMC performance

Volvo Malaysia Launches Locally Assembled ES90 Electric Sedan

AMPANG mari!!ZTH member

Search

Online now

Enjoying Zerotohundred?