I broke part and that fixed downshift clunk
1 Attachment(s)
Well not completly fixed, but I had a downshift into first clunk that is almost imperceptable compared to before.
The change happened when I broke the part in the picture a day ago while in there running some coolant hoses for my veggie project. The part has been long overdue for replacement. You can see all the gasket maker and similar sealants Ive had on it limping it along. Well, what is the part called? Im trying to describe to the dealer and to Phil at FL what Im after. Perhaps Im better off without it? Well maybee not buy why would the downshift clunk be less? |
That is your overbooost protection valve.
|
Quote:
|
Don't lose any sleep if you're without a two way valve there, as long as the boost sense hose is in good condition you are probably ok. For a while, or at least until you can get a replacement valve.
I ran a 300TD for two years without a valve. I plumbed the alda directly to the nipple on the back of the intake manifold. I finally found a cheap valve at a wrecking yard and put it in. Its a safety device true, but in reality how often has the wastegate valve failed on the turbo? I know of one case, the boost sense hose ruptured somehow. Its supposed to be silicone rubber Oh say, that reminds me I have a temporary one in place on my 603 engine, using a section of rubber hose I grabbed to get running. tsk :D |
Quote:
P.S. what is the official name for the broken vacuum thingy? |
You should not plumb the boost line directly into the ALDA. You can get overfueling. Mercedes put that in the system to keep the engine alive if there was a malfunction. Yes it rare, but why take a chance?
|
My MB mechanic at the dealer disconnected mine
My MB mechanic at the dealership disconnected and bypassed mine because it was leaking and giving rough shifts. He has been there 25 years and has a huge following with the older cars. He is tops in his reputation and knowhow. I don't think bypassing it will harm a thing. I've been running my car for 30k with it bypassed and no problems.
|
Quote:
However, if you lose the wastegate hose.........it slips off.......or cracks........there is no wastegate to bleed off boost pressure. Under such a condition, the turbo will offer some very high boost numbers............maybe up to 23 psi or so. The overboost protection valve is designed to protect the engine under such a condition and dump the boost. If you don't dump the boost, you have a good possibility of blowing the head gasket or melting a piston. So, run without it.........but understand the risk. |
Quote:
A blowoff valve would actually dump boost...something Benz and most diesels are not equiped with. Since few of us run boost guages you will not know you have a wastegate hose failure until damage has been done. Therefore its wise to keep it working....How many people here still have original 20+ year old wastegate hoses on your car? I'll bet most people. Like radiator hoses they don't last forever. |
Quote:
|
Quote:
|
I may try to adjust my wastegate today back to the factory spec of 13psi, mine only runs 10psi......I have a gauge and can see this......
|
Since the new one only costs $31, and MB put it there for a reason...:rolleyes:
Why do people insist on back yard engineering stuff like this?:rolleyes: |
All times are GMT -4. The time now is 10:23 AM. |
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website