Sprinter Boost Leak: Limp-Home Mode Fixed — Transcript

Full transcript

1. 0:00if you own a sprinter van you are
2. 0:02guaranteed to run into this issue at
3. 0:04some point during the life of the
4. 0:06vehicle you will encounter a boost leak
5. 0:08and that leak will put your van into an
6. 0:11engine limp mode and it'll just
7. 0:13generally make it run very poorly this
8. 0:16video will show you the exact steps you
9. 0:19need to take to find that boost leak
10. 0:21this is a turbo intercooler and we're
11. 0:23going to discuss why this mess exists
12. 0:26but first we need to tackle the low
13. 0:28hanging fruit now I have here a partial
14. 0:30view of your Boost system just for
15. 0:33clarity your engine sits right in the
16. 0:36middle and this is the front of the
17. 0:37vehicle where your radiator is let me
18. 0:40show you another view just to show you
19. 0:42what's going on this is the front of the
20. 0:44engine the Boost pipes are in blue this
21. 0:47is your turbo
22. 0:48resonator so just to give you an idea
23. 0:52this part is the same as this part now
24. 0:56that we have that out of the way let me
25. 0:58show you the first place you should look
26. 1:00for a boost leak it's at the front of
27. 1:03the vehicle on the right hand side
28. 1:05facing the vehicle this is the most
29. 1:06common host brake simply because the air
30. 1:09coming through here is still hot because
31. 1:12it sits before the turbo intercooler
32. 1:15first things first you want to check
33. 1:16this pipe for leaks if you can't see any
34. 1:20visible leaks you want someone to be
35. 1:22revving the engine as you're checking
36. 1:25that way the leaks will become far more
37. 1:27apparent and you'll likely hear
38. 1:28something the second place to look is
39. 1:32the cool side now even though the
40. 1:34boosted air has cooled down after
41. 1:36passing the intercooler you still want
42. 1:38to check this side simply because it is
43. 1:42prone to break they're rubber hoses and
44. 1:44they only last for so long so step one
45. 1:47hot side step two check the cold side
46. 1:50now step three is a bit of an obvious
47. 1:52one this here is the turbo resonator
48. 1:56just to give you an idea again you've
49. 1:58seen this on top of your engine before
50. 2:00here's your turbo it sits at the center
51. 2:03in the back of the engine and air goes
52. 2:06in gets spooled up and comes out now I
53. 2:10can't tell you how many times I've seen
54. 2:13issues with the turbo resonator a lot of
55. 2:16times it occurs right after you've had
56. 2:18some work done on your vehicle given
57. 2:21that the turbo resonator is held down by
58. 2:23three bolts you have two in the front
59. 2:26and then you have one in the back which
60. 2:28almost all mechan mechanics seem to
61. 2:31forget so make sure this turbo resonator
62. 2:35is in place make sure the rubber gasket
63. 2:37here is in place and just make sure
64. 2:40there's no leaks if you don't see any
65. 2:43visible leaks have someone rev the
66. 2:47engine slightly while looking at it now
67. 2:50tip number four is the turbo intercooler
68. 2:55itself and this brings us all the way
69. 2:57back to the first picture we saw now now
70. 3:00remember the pressurized air comes in
71. 3:02through here it cools down and then it
72. 3:05comes back out and into your engine this
73. 3:08is the route the air takes now if you
74. 3:12look at the older sprinters this entire
75. 3:15intercooler is made of metal newer ones
76. 3:19were not so lucky as you can see here we
77. 3:22have a whole lot of junk and this is the
78. 3:24hot side it's sitting upside down so
79. 3:26don't let that confuse you the newer
80. 3:28ones 2007 plus they all seem to be made
81. 3:31out of plastic and believe it or not at
82. 3:34some point in their time maybe around
83. 3:36200,000 miles or so in my personal
84. 3:39experience these will leak it's likely
85. 3:43the toughest part to diagnose given that
86. 3:46it's not always leaking sometimes it
87. 3:48will leak after a certain period of
88. 3:51driving you turn on the engine you're
89. 3:53good for a while maybe a certain amount
90. 3:55of heat causes the seal to open up again
91. 3:58and then boom you have leak 20 30
92. 4:01minutes down the road it can be
93. 4:03extremely frustrating to try and
94. 4:04diagnose this that's why a lot of times
95. 4:07you need to smoke machine if you do have
96. 4:09trouble but that's for a different video
97. 4:12so tip number four the fourth place you
98. 4:15want to look you want to check this
99. 4:17intercooler tip number five this gets a
100. 4:19little bit interesting here we're going
101. 4:21to follow the air back to where it
102. 4:24starts which means we're going to look
103. 4:26at this picture right here now hopefully
104. 4:28you recognize this just so that we're
105. 4:30all on the same page this is your turbo
106. 4:33this is your air snorkel the intake
107. 4:36where the air comes in non-pressurized
108. 4:38air turbo spools it up pressurized air
109. 4:42this specific issue occurs right here
110. 4:46especially at the bottom it can crack or
111. 4:48it can get pushed off this happens so
112. 4:50many times when this does happen it's
113. 4:53technically not considered a boost leak
114. 4:55but it will still cause your engine to
115. 4:57run like garbage it will cause a engine
116. 4:59limpo mode the reason for that is
117. 5:01because you have a math sensor which
118. 5:04calculates the volume of air coming in
119. 5:06now after that sensor you still have
120. 5:08other ways of measuring the volume of
121. 5:10air later on in the system so it
122. 5:12Compares those values and when it
123. 5:14recognizes that there's a difference in
124. 5:16air volume it will trigger that code so
125. 5:19if you have an offset drift at idle
126. 5:22offset drift under load those are very
127. 5:25clear indicators that you have certain
128. 5:27issues with your air intake system but
129. 5:29that's tip number five I'll give you two
130. 5:31more bonus tips bonus tip number one you
131. 5:34have a small Rubber seal that sits right
132. 5:38here if you're taking things off and
133. 5:41putting them back on it's super easy to
134. 5:43slip off check that seal a lot of times
135. 5:46your engine will may be making a funny
136. 5:48noise if that seal isn't there again
137. 5:51it's just a a small little rubber o-ring
138. 5:53tip number six is the PCV pipe right
139. 5:56here now I have a whole another video on
140. 5:58that which I'll link to right here here
141. 6:00but at some point these get brittle and
142. 6:03they can also they can also break you'll
143. 6:05see little cracks at the bottom of them
144. 6:08and you just want to replace the whole
145. 6:09thing if you see that use a rubber hose
146. 6:12a radiator hose from AutoZone those work
147. 6:14fine hard to see but this hose right
148. 6:17here I'll link the video in case you
149. 6:19want to know more about PCV hoses now if
150. 6:22there's more to this topic that I
151. 6:24haven't covered let me know in the
152. 6:26comments if you want to see an indepth
153. 6:29video on a smoke test on how I diagnose
154. 6:32these issues the quickest way possible
155. 6:35go ahead and subscribe for that