Weird Sounds When Spool Need Help

[KinG_KonG]

Hey guys, I havnt been able to found out the problem yet, but when i begin to spool in my r32 gts-t 1989, it makes a screeching sound. It's not a screamer pipe. However the revious owner said i might be the hicas, although the hicas light does not come on when driving. My brother said it could also be my drive shaft? since the rubber has came off on the driver side.

Also My dash is screwed. It seems that every other part on the dash works, excpet the speedo. It is stuck on 107,880 and it wont tell you what speed your going at. It just stays on zero.

Help my out guys thanks

Edited November 8, 2010 by KinG_KonG

[mosquitocoils]

I had the same problem and thought it was my turbo going. Turned out it was just a TINY air leak where the BOV joins the crossover intake pipe. Would be fine under normal driving but once all the pressurised boost air was flowing it would make a screeching kinda noise out of a tiny hole.

Just had to take it off and put it back on, making sure it sealed properly hahaha.

I wouldn't think it would be a driveshaft issue, if it's ONLY happening as you start boosting.

As for the speedo, take your cluster out (check the tutorial section of the site) and make sure the big thick mechanical cable is plugged into the back of it - without it the speedo and odo won't work at all.

[KinG_KonG]

I had the same problem and thought it was my turbo going. Turned out it was just a TINY air leak where the BOV joins the crossover intake pipe. Would be fine under normal driving but once all the pressurised boost air was flowing it would make a screeching kinda noise out of a tiny hole.

Just had to take it off and put it back on, making sure it sealed properly hahaha.

I wouldn't think it would be a driveshaft issue, if it's ONLY happening as you start boosting.

As for the speedo, take your cluster out (check the tutorial section of the site) and make sure the big thick mechanical cable is plugged into the back of it - without it the speedo and odo won't work at all.

Thanks for the reply. Ill check the tutorial section. Before i do. Just thought id run it by you, that its only under load that it makes thats sound. If i rev in neutral it doesnt make that screaming sound. Still thinks its the bov? plus my car is bypassed the turbo so it doses.

[mad082]

if it was a leak in the cross over pipe like what mosquitocoils had then it would still only happen under boost as that is when the pressure is increased in the pipe and it is forcing air out which makes the noise. basically like whistling, just holding your mouth in the position doesn't make you whistle until you start blowing air out.

the other possibility which is also rather possible is that it is infact the turbo. it would be worthwhile for you to pull off the intake pipe and feel the turbo for any play. basically if you can move the shaft side to side a bit (small amount of movement is normal, but not too much), or backwards and fowards and it's stuffed.

[shaunr34gtt]

i had the same thing under boost

tuned out to the the turbo exhaust flange nuts comming loose have to tighten them up every 2 years - tabs to hold the nuts in position are useless

only when boosting under load - at idle didnt do it

got pregressivly worse over a week or 2 while trying to work out what it was.

also check exhaust manifold bolts to the head - may have broken a stud

[KinG_KonG]

i had the same thing under boost

tuned out to the the turbo exhaust flange nuts comming loose have to tighten them up every 2 years - tabs to hold the nuts in position are useless

only when boosting under load - at idle didnt do it

got pregressivly worse over a week or 2 while trying to work out what it was.

also check exhaust manifold bolts to the head - may have broken a stud

sweet will do shaun, thanks for the help guys ill let you know what the problem was