2003 VW Lt35 TDi Camper (1 Viewer)

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AlanJ46

Free Member
Jun 9, 2019
5
0
Funster No
61,515
MH
2003 VW LT35 TDi
Exp
9 yrs
Problem.Develops a distinct 'hiss' when under load (2250 rpm on).Not detectable when stationary.No loss of power,fuel consumtion normal (25-27 mpg),oil consumption normal.Runs normally.No obvious hose leaks.Small crack in EGR pipe (replaced-made no difference).
Help required !!
AlanJ46
 
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AlanJ46

Free Member
Jun 9, 2019
5
0
Funster No
61,515
MH
2003 VW LT35 TDi
Exp
9 yrs
OK many thanks for the above-Will look at that aspect.In the abscene of visible damage must be some sort of pressure test??
 
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AlanJ46

Free Member
Jun 9, 2019
5
0
Funster No
61,515
MH
2003 VW LT35 TDi
Exp
9 yrs
Nice one-I try.TVM

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RS_rob

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Dec 14, 2013
1,010
669
Turnford
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C Class
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over a Year Yay................
Check the bolts on the Turbo & all the pipes that are under pressure i.e going from the turbo to the head, this will inter-cooler if fitted.
 
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AlanJ46

Free Member
Jun 9, 2019
5
0
Funster No
61,515
MH
2003 VW LT35 TDi
Exp
9 yrs
Thanks for that.V. helpfull.What did you mean by '....this will inter-cooler if fitted.'?
 

TheBig1

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Nov 27, 2011
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it only takes a tiny rust hole or a perished rubber to allow pressure to hiss
 
Oct 2, 2008
4,616
8,466
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Duro 6x6 Overlander
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Look for oil misting at any joins especially on intercooler seams , or at hose joints as a telltale .
 
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AlanJ46

Free Member
Jun 9, 2019
5
0
Funster No
61,515
MH
2003 VW LT35 TDi
Exp
9 yrs
All very helpfull responses.Trouble is,getting at the pipes/hoses etc.Anyone tell me what is the first sign of trouble if not attended to?As I say vehicle runs fine (now).

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TheBig1

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Nov 27, 2011
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19,048
MH
A class
Exp
many many years! since I was a kid
that is the first sign and if not regularly maintained can start costing big money. If it is a leaking turbo, then they can fail catastrophically wrecking the engine. get it checked
 

RS_rob

Free Member
Dec 14, 2013
1,010
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Turnford
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MH
C Class
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over a Year Yay................
Thanks for that.V. helpfull.What did you mean by '....this will inter-cooler if fitted.'?

Looking at some pictures it looks like your engine is cantered over to the left & if you look in from the left past the airbox to the back of your engine you will spot the turbo it is part of the exhaust system. Now it will either have a large rubber pipe going to the throttle body/head (non intercooled) or the pipe will feed to the front of the van into what looks like a small radiator this will be the intercooler then from the other side a pipe will feed to the throttle body/head.

Intercoolers are normally mounted so that fresh cold air can cool down the compressed gasses this then gives extra oomph.
 

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