Vauxhall Cavalier (1988 - 1995) - 88-95 Isuzu 1.7 diesel engine power loss (turbo ?)

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Mon 7 Jan 2008 20:59
88-95 Isuzu 1.7 diesel engine power loss (turbo ?) - Rubber Ball
Just bought a cheap run around and after a few days of driving it, i have noticed a big loss in power whilst going up hills. Thought it may be the turbo as when i felt it, it was cool to touch. Any other suggestions would be welcomed.

slt

Edited by Pugugly {P} on 07/01/2008 at 21:06

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Mon 7 Jan 2008 21:02
problem with turbo on isuzu 1.7 deisel engine - Railroad.
The obvious thing to suspect is that one of the air intake/turbo hoses has either split or fallen off.......
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Mon 7 Jan 2008 21:17
problem with turbo on isuzu 1.7 deisel engine - Rubber Ball
thanks for the info. i will check that out and see if that is the cause.
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Mon 7 Jan 2008 22:39
problem with turbo on isuzu 1.7 deisel engine - topbloke
there is know way that the turbo could be cool except first thing in morning after sitting all night, it has exhaust gasses running through it constantly when engine is running, a split pipe could cause the symptom you descibe but assuming that the pipes are okay air filter clean then i would get the tappets checked for clearances these are not the easiest things in the world to adjust, and don't get done by your average garage plus you will need a special bit of equipment and lots of shims, check the obvious then get the tappets checked/adjusted
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Mon 7 Jan 2008 23:25
problem with turbo on isuzu 1.7 deisel engine - Number_Cruncher
It's not unknown for these to incorrectly have 2 air filters in - one on the inner wing, and one in the large box directly above the inlet manifold. One might look fine, and the other would be manky.

>>these are not the easiest things in the world to adjust

True, but at least the shims are between the cam and follower, rather than between the follower and valve stem tip!

>>you will need a special bit of equipment

A micrometer to measure the shims?

>>lots of shims

either that, or access to a surface grinder to take some metal off your existing shims.

I do agree - the valve clearances on these engines were routinely ignored, and frequently the inlets would close up completely, losing compression and hence performance - although it's more usual for the valve clearances to cause poor starting from cold.

Number_Cruncher
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