mike1114

iTrader: (1)

Ok, here's the story:

I got a 97 Civic Coupe W/GSR motor with t3/t4 turbo setup 10lbs, .60/.63 ar's 57 trim. Fluidyne radiator, slim fans, spoon thermostat etc....

When I drive for like a half hour or more the heat from the motor gets so excessive I can hardly shift gears anymore, almost like there is no fluid in my transmission. I checked it and it is full, I'm using GM modified synchromesh. My temp gauge still stays normal for the most part, right in the middle, egt temps at a steady 90 mph is around 800C (around 1400 F). I have a grind in third gear that is only getting worse also, don't know if this is contributing to not being able to shift into any gear easily, I almost have to double clutch all the time now. This only happens after a while of driving like I said.

I change my oil religously every 2000 miles seriously, and I change tranny fluid often too, about 5000 miles ago.

Can anyone help? Give advice????

acy76

First thing I would check is the clutch slave cylinder - those can be very sensitive to underhood temps when they start to fail.

mike1114

iTrader: (1)

Thanks acy76.

I did just change that about 5000 miles ago. Think the heat would kill the slave cylinder that quick? The turbo is Very near the slave cyl

acy76

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike1114 &raquo;</TD></TR><TR><TD CLASS="quote">I did just change that about 5000 miles ago. Think the heat would kill the slave cylinder that quick? The turbo is Very near the slave cyl</TD></TR></TABLE>

It may just be heating it up to the point where it can't hold the pressure - can you shield it at all?

mike1114

iTrader: (1)

I'll give shielding it a try. I hope something simpe like this is the answer.

This is an extreme but I was also think about hooking up a pump to my oil return and sending the oil through an oil cooler before back to the pan to help keep underhood temps down.

Anyone have any other suggestions?

mike1114

iTrader: (1)

bump

InfamousGSR

change the fluid it sucks and get honda mtf. mine sounded like a walrus after an hour of driving and shifting got notchy after awile.

mike1114

iTrader: (1)

I will also switch back to Honda MTF tomorrow. GM stuff didn't help for **** anyway.

Thanks for the replies.

Blaze45

You gotta let the GM stuff work its magic... It took my fluid like a little over 500 miles to completely stop the grinding.... Now it shifts wonderful and I have no complaints, As for your tranny, maybe you could try a tranny temp gauge and see whats really going on. Maybe your tranny is just at the end of the road? How many miles is on it and how hard have you beat on it?

Blaze

mike1114

iTrader: (1)

thanks for the response but I used GM Modified for a LONG while, don't like it, either my grind was too bad or it's not all that good. Most likely the grind is too bad.

any other ideas? I believe it is most likely the slave cyl getting too hot like said before.

acy76

There was also a recent thread discussing heat wrapping of manifolds and downpipes I was reading on here.. maybe you could try wrapping that all up?

InfamousGSR

ya and then have some nice cracked headers.

mike1114

iTrader: (1)

Thanks for the replies. It is definitely the slave cyl, replaced today and everything works fine.

I created a small heatsheild for the slave cyl, hopefully this helps. I'm gonna make one also for the turbo soon.

Anyone have some ideas for reducing under hood temps? I know this has been discussed before so don't suggest washers for the hood or removing splash guards. I did like the idea of a duct that directs air directly towards the tubro but I don't know how much that will work. Any other ideas?

One other question, to anyone who went from standard thrust bearing turbo to ball bearing with water cooled center, did you notice the temps go down at all?

mike1114

iTrader: (1)

I thought about heat wrap but as others said, eventually the moisture is traps between the insulation and piping will cause it to rust and then crack. I am also tossing around the idea of thermal coating my turbo and mani.

mike1114

iTrader: (1)

bump

Bontke

Motul 600 degree brake fluid in the clutch slave cylinder ...sweet