Wear of valve seals on a Chevrolet Cruze can lead to damage to camshafts and cylinder head elements. So, timely replacement can prevent unpleasant consequences. But not every car enthusiast is able to replace this part on his own, since the process is labor-intensive and requires certain knowledge and skills.
Video
The video will tell you how to replace camshaft seals, as well as tell you about the nuances and give recommendations
Where is?
The oil seal is a rubber ring on a metal base. The main purpose of the rubber seal is to prevent oil leakage, and the secondary purpose is to protect the unit from dirt, dust and moisture when the bolts are sufficiently tightened. The oil seal is located on the camshaft immediately behind its pulley. The rubber gasket may cause a knocking sound when the engine is running.
Location of the oil seal behind the pulley
Causes and symptoms of malfunction
How long the oil seal will last depends on the conditions in which the car is operated, the tightening of the bolts, and the belt tension. If the driver has a sporty driving style, the engine often experiences stress, which leads to premature wear of the components.
Seals should be changed:
- when changing oil;
- when defects are detected;
- if traces of oil are found;
- if the engine knocks.
In addition, the cuff must be changed when replacing the standard camshaft with a sports one.
Replacement Guide
If it is determined that the engine is knocking due to the cuffs, then they need to be replaced.
This video shows how to fix camshaft runout and replace the gasket.
Tools
For repairs you will need a minimum set of tools:
- spanner set to “17”;
- head with extension 10;
- slotted (flat) screwdriver;
- cuff mandrel;
- hammer.
It is better to buy a new consumable than an original one, it depends on how long it will last.
Stages
The procedure for replacing the camshaft oil seal on a VAZ2109 consists of two stages: removal and installation. When removing parts, remember the order in order to follow it when reassembling.
Removal
- First of all, you should turn off the power to the car by removing the negative terminal from the battery.
- Next, you need to set the position of the piston in the first cylinder to TDC of the compression stroke. To do this, mark the crankshaft and camshaft.
- Now, by loosening the camshaft mounting bolt and the tension roller, you can remove the timing belt.
- Then unscrew the bolt and remove the camshaft pulley and key.
- Using a screwdriver or awl, remove the camshaft oil seal.
The moment of removing the camshaft cuff with a screwdriver
Installation
- Before installing a new consumable, you need to lubricate its edge with engine oil.
Camshaft seal
- The part is installed with the working edge facing the cylinder head. Then you need to use a screwdriver to tuck the edge of the rubber ring on the camshaft.
- After installation, the gasket must be driven in using a hammer and a mandrel of the appropriate diameter until it stops.
- After installing the cuff, all oil stains should be removed so that smudges can be seen later.
- Next, the previously removed parts are installed in reverse order.
After completing the repair, you should start the engine and check its operation: no knocks or extraneous sounds should be heard.
If the engine is knocking, then you need to look for the cause of the knocking and fix the problem, perhaps you need to tighten the bolts.
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Subtleties of the process
Replacing the oil seal is technologically the same on all cars. Depending on the car, when a certain mileage is reached, oil stains begin to appear in the oil seal and pulley area. As the mileage increases, their size increases. This means that it is time to change the oil seal.
The main danger of oil leakage is not that its volume decreases. Liquid gets on the belt and pulley. Hot oil has an adverse effect on the rubber of the belt, which reduces the service life of the part. In addition, the connection elements become slippery - the belt teeth can slide off the pulley teeth.
As a result, cracks appear in the pistons and valves are damaged. In any case, oil leaks must be eliminated. To do this, change the seals. The belt replacement process may differ on some vehicles. For example, new cars have 2 pulleys and a camshaft. Here you need to change 2 oil seals. A longer belt is also placed here, which requires more careful handling. In this case, it is also necessary to apply marks.
It is better not to resort to working with a marker, but by turning the crankshaft pulley bolt clockwise, set the pulleys to the position of the factory marks. They are also applied to the engine. It happens when marks are only on the pulleys.
Once the marks are set, you can remove the belt. In this case, the camshaft and crankshaft are in the position relative to each other when 1 cylinder is raised to TDC. In some cases, the entire belt is removed while simultaneously replacing the crankshaft and camshaft seals. These parts wear out almost simultaneously.
Knowing how to change oil seals, you can carry out minor repairs yourself. This will avoid failure of pistons and cylinders and damage to the drive belt.
Video “Replacing the camshaft oil seal on VAZ models 2108 - 21099”
This video shows in detail the process of replacing the camshaft rubber gasket.
Welcome! Today we will look at the correct replacement of the camshaft oil seal on cars of the Samara family. If you are doing the work for the first time, then you will have to spend about 30 minutes or 1 hour on it, depending on how quickly you understand it all.
Note! To replace the camshaft seal, you will need a spanner wrench, an extension with a “10” head, as well as a mandrel, a hammer and a screwdriver!
Summary:
Where is the camshaft oil seal located? The oil seal is located immediately behind the camshaft pulley. The oil seal can be seen in two ways, either with the camshaft pulley removed (Very well visible, see photo below), or with the pulley installed, but not so clearly.
When do you need to change the camshaft seal? The oil seal must be replaced if:
Note! Oil may leak through the oil seal for some other reasons, these include:
- Severe contamination of the crankcase ventilation system. (How to clean the system, read in detail in the article on our website, entitled: “Cleaning the crankcase ventilation system”)
- As well as pinching the hoses of the same system.
Note! After eliminating all these problems, if the leakage through the oil seal does not stop, then replace it with a new one!
Causes of oil leaks
As you know, a damaged oil seal leads to oil leakage, which is unacceptable. But before blaming this element for everything, you need to know about other reasons that lead to similar symptoms.
Cause
Your actions
Dirty crankcase ventilation system
When the system is contaminated, the fluid flow is disrupted, pressure increases, and traces of oil leakage from the crankcase appear. You need to clean the crankcase ventilation system
Pinched crankcase ventilation system hoses
If the hoses are pinched, this will also soon lead to a leak. The problem can be solved in two ways - restore the structure of the hoses or replace them with new ones in case of wear
Deformation, wear of the oil seal
This is a case that we will talk about in more detail in our article. Replacing the oil seal is not difficult, so it is not necessary to contact a service station.
Damage to the oil seal leads to leaks. As a result, oil gets onto the timing belt, which negatively affects its condition, performance and efficiency of the entire engine. Therefore, replacement is a necessary measure.
How to replace the camshaft oil seal on a VAZ 2108-VAZ 21099?
Removal: 1) At the beginning of the operation, with the “AKB” (which means rechargeable battery), remove the “negative” terminal. (How to remove the terminal from the “battery”, see the article: “Replacing the battery” in paragraph “1”)
2) Next, be sure to set all the “Gas distribution mechanism” marks, and then remove the “Timing Belt” from the car. (You will find how to set all the marks and then remove the timing belt in the article: “Replacing the timing belt”, in the “Removal” section)
3) When the belt is removed, insert a “10” socket with an extension through the hole in the camshaft pulley, and then put it on the nut that secures the rear timing belt cover, thereby securing the pulley from turning. After the pulley is fixed, using a spanner wrench, unscrew the central bolt that secures the pulley.
Note! Once the center bolt is removed, remove the camshaft pulley from the vehicle!
4) Then, taking a flathead screwdriver in your hands, use it to remove the pulley key from the groove in the camshaft.
Note! The key must be removed, otherwise it may simply get lost when removing the oil seal!
5) After the key is removed, without removing the screwdriver, use it to remove the camshaft oil seal.
Installation: • Before you begin installing a new oil seal, check its condition by inspecting its working edge, which is indicated by the letter “A”. There should be no defects on the working edge; it should be smooth, without dents, without tearing out, and without rubber sagging.
• The camshaft oil seal spring, which is designated by the letter “B,” must also be intact and not stretched, otherwise replace the oil seal with a new one.
1) First, taking the new camshaft oil seal in your hands, lubricate its working edge with engine oil.
2) Then install the oil seal with the working edge towards the cylinder head, and then carefully, using a screwdriver or a wooden stick, tuck the working edge of the oil seal onto the camshaft.
Note! When the oil seal is installed on the camshaft, finally drive it in using a hammer and a suitable mandrel diameter. If you don’t have a mandrel, then you can use a head instead, or a piece of pipe of a suitable diameter!
3) And finally, install all previously removed parts, such as the pulley key, the camshaft pulley itself and the timing belt, in their place.
Note! • For details on installing the timing belt, see everything in the same article that described the instructions for removing it.
• The camshaft pulley must be installed with the protruding part of the hub facing the car engine!
Additional video materials: Below, especially for you, we have prepared a video clip that describes in detail the replacement of the camshaft oil seal on cars of the Samara family.
Camshaft oil seal VAZ2109
Replacing the camshaft oil seal on a VAZ 2109 is carried out for the same reasons as replacing the front or rear crankshaft seal, when oil leaks are detected. If you find traces of oil leakage through the camshaft seal, first check the crankcase ventilation system (it could be clogged). The hoses of this very system may be pinched; if necessary, clean the system. If after this the oil leak does not stop, then replacing the camshaft oil seal with a VAZ 2109 will solve this problem.
Camshaft seals
Lada 2109 Blue Midnight Logbook Leaking rear crankshaft oil seal and replacing the engine side mount
Removing oil seals for replacement:
- After removing all the devices - covers and gears, access to the ends of the shafts and pressed seals will open. Using a depth gauge (on a caliper), measure the depth of their planting.
- A method that is gentle on the camshaft journal: screw self-tapping screws into two holes drilled at diametrically opposite points on the oil seal surface and, hooking them with pliers, remove the part. Examine the seat for signs of wear and use a brush and rag to wipe the assembly dry.
Installation of a new element:
- The new oil seal is lubricated with engine oil and fitted with the bottom edge facing outwards.
- Using a bushing of a suitable diameter, the seal is pressed to the specified depth.
Purpose
What is an oil seal and why is it needed? An oil seal (rubber-metal cuff) is a special seal in the form of a rubber ring on a metal base, which is used to seal assemblies and assemblies with rotating parts to ensure tightness of the gaps between rotating and stationary parts. The main purpose of the cuff is to prevent leakage of lubricant. In addition, the auxiliary purpose of the oil seal is to protect the unit from moisture, dust and dirt. It won't be difficult for you to replace it yourself.
Tool
Minimum required tools:
- Socket wrench “17”
- Head "10", with extension
- Flat (slotted) screwdriver
- Hammer
- Mandrel for oil seal
