High Comp 120cc Build

The Mad Cadder

Well-Known Member
Joined
Sep 20, 2013
Messages
3,856
Reaction score
41
Points
48
Location
Detoilet Mi
No need to retorque head gaskets.. and beside they aren't
leaking...

Wow bro you did a real first class torture test ..

Hopefully you didn't crack the heads or worse yet block ..
It sounds like you may have skidded by this time..

I don't think you cracked it.. it would be blowing the radiator out

So with that.if you take the cap off (cold) does it spit water out
the rad.. that's first sign of blowin head gasket or cracks...

First things to check for that drivetrain vibration..
Motor mounts.. including trans... ujoints.. cardin joint..
A vibration that comes and goes with load that is not engine related is usually one of those things..
 
Joined
Aug 25, 2008
Messages
586
Reaction score
15
Points
18
Interesting thread in Speedtalk.com "Re-torque MLS comtec head gaskets?"

Especially about over heated engines and aluminum cylinder heads.

John
 

samIam

Member
Joined
Aug 10, 2010
Messages
612
Reaction score
18
Points
18
Location
Minneapolis, MN
So it looks like the motor survived. Been driving it to work for a few days now with no problems. I've been on the gas too with no issues. I replaced the thermastat with another 180 degree caddy stat and drilled a tiny hole in it. Also replaced the radiator cap with a 16lb cap. i'll find an 18lb cap one day. Temp stays steady at 200-210, even when its just sitting at a light.

I was lucky enough to find stock rear control arms at the swap meet a couple days ago. Might put them back in since I've had the vibration problem since I put the adjustables on. Never thought a rear end vibration would almost take my motor out. We will see...


As far as retorque the heads, on felpro forum, they say its "not necessary with the parmatorque gaskets but wouldnt hurt".
 

The Mad Cadder

Well-Known Member
Joined
Sep 20, 2013
Messages
3,856
Reaction score
41
Points
48
Location
Detoilet Mi
If you set the new controll arms to the same length as stock
that is not your vibration problem.. see my previous post
 

samIam

Member
Joined
Aug 10, 2010
Messages
612
Reaction score
18
Points
18
Location
Minneapolis, MN
Yea, I've chased this problem for years now. New ujoints, rebalanced the driveshaft, new axle, different wheels...

adjusting rear control arms to get a different driveline angle helped but, according to my angle finder, its where it should be.
 

The Mad Cadder

Well-Known Member
Joined
Sep 20, 2013
Messages
3,856
Reaction score
41
Points
48
Location
Detoilet Mi
The Mad Cadder said:
Did you check your motor mounts ?
Trans mount ?

I have a feeling this was causing my drivetrain vibe..
Exactly the same one you describe.. Rock Auto has them
for under $5.00 ea. I got mine from Summit for $5.00
 

samIam

Member
Joined
Aug 10, 2010
Messages
612
Reaction score
18
Points
18
Location
Minneapolis, MN
Finally got the car in the garage and on the lift now. I'm gonna take the rear control arms off and take a better look at the hardware. Also gotta replace the flex plate. Car wasn't in any accidents that I know of. I also measured the rear axle with an angle finder for twisting and it looks good.
 

PJ McCoy

Well-Known Member
Joined
Jul 11, 2015
Messages
1,283
Reaction score
369
Points
83
Location
Outter Banks NC
BRO!!!!!!!!!!!!!!!!!!!!!!! BROSAM!!!!!!!!!!
Sam I love it! I realy Love it! Thats a tuff looking ride.
Come on and give us some Car Vid.
So I pray, Oh please God of Cadillacs i pray his ride sounds as sweet as his car looks. Look down from the tire smoke filled skys and bless us with sounds from Sam's car, I ask that it would bring smiles to our faces and cause us old men to dream like we were young again. Give us strength for our journey as we give you all our tire spinning, tach winding, body twisting, left front fender lifting Praise, And all the hooligans said, Amen!
o_O
 

blue68deville

Active Member
Joined
Dec 7, 2011
Messages
157
Reaction score
27
Points
28
Location
Denver
That's one mean ass ride! I love those coupes, they're big but not huge and have nice proportions. You just made it better, the stance is perfect.
 

Darius

Well-Known Member
Joined
Oct 15, 2004
Messages
4,593
Reaction score
867
Points
113
BRO!!!!!!!!!!!!!!!!!!!!!!! BROSAM!!!!!!!!!!
Sam I love it! I realy Love it! Thats a tuff looking ride.
Come on and give us some Car Vid.
So I pray, Oh please God of Cadillacs i pray his ride sounds as sweet as his car looks. Look down from the tire smoke filled skys and bless us with sounds from Sam's car, I ask that it would bring smiles to our faces and cause us old men to dream like we were young again. Give us strength for our journey as we give you all our tire spinning, tach winding, body twisting, left front fender lifting Praise, And all the hooligans said, Amen!
o_O

And the Church (along with the hooligans - they ain't from around here and jus moved in a couple of days ago) said, AMEN and AMEN!!

Peace,
 

Darius

Well-Known Member
Joined
Oct 15, 2004
Messages
4,593
Reaction score
867
Points
113
P.j.:
You been hanging out in the choir loft with bro d, too long!!!
ciao,
mario

BUT, that's where the repenting, young Sister are!!!

d
 
Last edited:

The Mad Cadder

Well-Known Member
Joined
Sep 20, 2013
Messages
3,856
Reaction score
41
Points
48
Location
Detoilet Mi
I would like to know for my car.. also your actual mounted section width ??
What brand slick and what style tire.. big difference in section width and footprint depending of those items ..
Drag rim setup. 28.5x10x15 205/70/15
15x8....4" BS all around. Barely fit under the skirts, maybe half inch.
 
Top