honda9krpm

I just turbocharged my s2000.
https://honda-tech.com/zerothread?id=1167838



My turbo bolts kept on getting loose. The turbo-manifold bolts got loosened a few times. I retightened without much success. I drove to the track last weekend, only to find that the dump pipe was disconnected from the turbo and wastegate completely. The bolts holding the dp to the turbo and wastegate felled off!!!

The car is in the workshop for a nissan diff conversion atm and will head back to my friend's workshop to fix this "turbo trying to come off problem"

The engine was blue printed, balanced and rebuilt. There is no problem at 16psi and it has reved up to 9500rpm in the past with a 14psi supercharger on it.

Has anyone had this problem before? Any possible solution?

beepy

Very common problem. When heated, the stainless steel bolts expand a bit more than the cast iron flanges. You should tighten your bolts when the turbo is hot. If they don't snap off when it cools you're golden.

Failing that, use safety wire.

tonis56

this happened to me on my sohc turbo and i used some hi temp loctite. The loctite held for a while. Beepy is completely right, i would try that

vaporboy12

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tonis56 &raquo;</TD></TR><TR><TD CLASS="quote">this happened to me on my sohc turbo and i used some hi temp loctite. The loctite held for a while. Beepy is completely right, i would try that </TD></TR></TABLE>
what he said

1.8tgsr

Try using lockwashers. I had the same problem on my GSR, the lock washers have worked great so far!

f22b2tdave

even with lock washers my turbo bolts back out, safety pins would be a lifesaver but i dont really have any overhang with these bolts...

tonis56

hey, another thing would be to use star washers. they bite into the metal to hold. i also used them

m R g S r

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1.8tgsr &raquo;</TD></TR><TR><TD CLASS="quote">Try using lockwashers. I had the same problem on my GSR, the lock washers have worked great so far!</TD></TR></TABLE>
They worked for me....or just try tack welding on the bolt. . .vibration won't make it come off, but if you ever wanna unbolt it, a little force will break it free.....

VRD^don

V-BAND...just for DP ..yeah try using star washers like toni said..

USDM 4G VTEC

why anyone uses the same type of nuts for ur bolts as the ones on the stock engine manifold

if u guys havent noticed the reason why the stock exhaust manifold nuts have cuts on their head its because they are designed to grip into the bolt, and provide a bite effect, wich wont allow it to backoff easy
go to a real nut& bolts shop. they will know what to get

Justateg

This is a little different and would require drilling, but i work on planes and we saftey wire bolts to each other in a clockwise double twist and if one tries to back out the other wont let it. like this


You can do this on one, two , three, four, five, six, etc bolts/nuts. you can also do each on individually and do it to something stationary ie. the manifold
this takes a little practice to get it nice and tight. but i think it would look different i may do it to my wastegate bolts just to be different. Your probably going to ***** your hands one or two times too

here is a site with more info:
http://www.geocities.com/robm3....html

PS: Nice s2000

.::Lee::.

As ghetto as this makes me sound, I actually had three bolts back out within a matter of minutes and my turbo fell right off while I was on the freeway shortly after I had done some maintenance and had taken the turbo off. Luckly the downpipe held it up and kept it from crimping the oil line too much. Thank goodness for the extra wire I had in my trunk that I was able to tie it up with to get it home.

I have looked all over for some sort of loc-tite that would be good for somewhere up to 1000 degrees but there's nothing anywhere close. So I just used the regular hi-temp loc-tite coupled with some lock washers and everything has been good since. (I still check everything frequently though, I'm not going to have my turbo fall off again )

1Bar GSR

I use lockwashers on mine and they havnt come out yet and havnt moved or backed out... lockwashers work great!

CRVRX

We ran into the same probelm bolts falling out of the turbo to manifold. I tried star washer, spring washers, loctite. I now torque the bolts then put a small tack on one side in a spot that can be ground off if needed. Hadn't had a bolt fall out since, 20+ turbos later.

Doodoo

Anyone know if there is a split-lock bolt made in the same size as the exhaust bolts?

honda9krpm

you guys are great
thanks for all the tips
I will prob have to use a combination of these techniques for different bolts as the space is really tight for a top mount turbo in the s2k.

Thanks again

oxSLEEPERxo

is this the lock washers yall talking about?

http://store.nutsandbolts.com/splowazi.html

.::Lee::.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by oxSLEEPERxo &raquo;</TD></TR><TR><TD CLASS="quote">is this the lock washers yall talking about?

http://store.nutsandbolts.com/splowazi.html</TD></TR></TABLE>

Yup, but you can buy them in singles anywhere....no need for e-shopping on these bad boys.

Doodoo

These are what I was talking about.

http://www.apo.com.au/products.html

Hyaboosta

yeah I had the same problem with my downpipe. Just throw a lockwasher inbetween.

CRXDrew

Got any gasket maker? Like th copper copper gasket hondabond stype stuff. I just put some on the threads. Solved my problem. (My downpipe almost fell off one time b4 I did this)

Muckman

iTrader: (2)

What we need is cotter pins for our turbo bolts.

RacerXI

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRVRX &raquo;</TD></TR><TR><TD CLASS="quote">We ran into the same probelm bolts falling out of the turbo to manifold. I tried star washer, spring washers, loctite. I now torque the bolts then put a small tack on one side in a spot that can be ground off if needed. Hadn't had a bolt fall out since, 20+ turbos later.</TD></TR></TABLE>

crx12

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Doodoo &raquo;</TD></TR><TR><TD CLASS="quote">These are what I was talking about.

http://www.apo.com.au/products.html

</TD></TR></TABLE>

Those are cool never seen those before.

BlueSi2k

I had this problem all the time with the turbo-mani bolts. I used star washers on the dp and never had a problem with them.

For the mani bolts, i used 4 small hose clamps (the worm type) and tightened them around the head of each bolt in such a way that the the adjustment part would be backed against the turbine housing not letting the bolts turn. Never had a problem again. Kind of hard to explain.