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Forum: FAQ Board
04-02-2023, 06:47 PM
Replies: 69
Views: 68,245
Posted By m smith

Re: 82-88 Discs to 89-92/Pics and Part Numbers

Great info. Thank you very much.
Forum: Brakes
04-01-2023, 09:25 PM
Replies: 6
Views: 559
Posted By m smith

Re: 1988 -89 rear caliper swap

Thanks for the info.Would I have to fabricate the brake lines too?
Forum: Brakes
04-01-2023, 05:27 PM
Replies: 6
Views: 559
Posted By m smith

1988 -89 rear caliper swap

Can the rear calipers from a 1989-92 directly bolt on a 1988- 9 bolt axle with the crappy j65 calipers.Thanks for any help.
Forum: Brakes
05-05-2019, 04:31 PM
Replies: 10
Views: 1,559
Posted By m smith

Re: j65 to pbr

Thank you to everyone for your informative replies. Now I have the details on this issue.Much appreciated!
Forum: Brakes
05-05-2019, 08:49 AM
Replies: 10
Views: 1,559
Posted By m smith

Re: j65 to pbr

Thanks for the info.When they changed them I thought they would have used a different RPO.
Forum: Brakes
05-05-2019, 08:41 AM
Replies: 10
Views: 1,559
Posted By m smith

Re: j65 to pbr

What non 1le calipers did the 89 to 92 use then?
Forum: Brakes
05-05-2019, 08:39 AM
Replies: 10
Views: 1,559
Posted By m smith

Re: j65 to pbr

So I would have to change the backing plate to mount the calipers?It is not a direct swap.
Forum: Brakes
05-04-2019, 10:13 AM
Replies: 10
Views: 1,559
Posted By m smith

j65 to pbr

Does anyone know if the 89 to 92 pbr non 1le rear calipers will directly interchange with the 1988 j65 rear calipers on a borg warner 9 bolt. Thanks
Forum: Cooling
05-01-2019, 06:19 AM
Replies: 3
Views: 514
Posted By m smith

Re: Fan switch depth

Check the bulb on the end of the switch that protrudes into the head.Some have a large bulb and some have a small one even though they are the same temp turn on point.If you have a large one it is...
Forum: Cooling
12-08-2018, 07:42 PM
Replies: 1
Views: 474
Posted By m smith

overheating issue

I have an 84 Z28 305 and the upper rad hose and top half of the rad is hot but the bottom half of the rad is cold and the lower rad hose is cold.The temp guage goes up to the red zone.I changed the...
Forum: Brakes
04-21-2018, 11:12 AM
Replies: 2
Views: 613
Posted By m smith

Re: caliper swap

Thank you for your reply.I wasn`t sure if it was a direct swap or not. Thanks for the information.
Forum: Brakes
04-21-2018, 09:03 AM
Replies: 2
Views: 613
Posted By m smith

caliper swap

Will 1989 stock rear calipers be direct bolt on for 1988 stock rear calipers on a 9-bolt.
Forum: TPI
04-07-2015, 07:01 AM
Replies: 5
Views: 679
Posted By m smith

Re: fuel injector question

Thanks for the info.I get how the system works now.
Forum: TPI
04-06-2015, 08:26 PM
Replies: 5
Views: 679
Posted By m smith

Re: fuel injector question

That seems odd to me.Why would they all fire at the same time.One cylinder would be on intake another on exhaust another on compression and another on power.Wouldn`t it make sense for them to fire...
Forum: TPI
04-06-2015, 07:15 PM
Replies: 5
Views: 679
Posted By m smith

fuel injector question

I have a 1988 5.7L Iroc.The fuel injector wires on 1 3 5 7 cylinders are all black with pink.How do you know which wire goes to what injector.Thanks for any help.
Forum: Cooling
02-10-2013, 06:29 PM
Replies: 2
Views: 523
Posted By m smith

incorrect gauge readings

Maybe the gauge in the car is accurate.The sender for the gauge is between #1 and 3 combustion chambers.The cts is in the intake manifold.It makes sense that the temp between the chambers is going to...
Forum: Cooling
06-05-2012, 09:33 PM
Replies: 4
Views: 609
Posted By m smith

Re: fans run manually not automatically

All original wiring intact.All I did was splice a single wire from the green/white wire on the primary relay to a switch inside the car and a wire from the switch to ground.Did the same for secondary...
Forum: Cooling
06-05-2012, 05:30 PM
Replies: 14
Views: 2,173
Posted By m smith

Re: Driver's side fan turns on when ignition on

1990 Nightmare try removing the fan fuse from the fuse block.If the fan keeps running try replacing the relay.If the fan stops put the fuse back in and remove the wire to the fan switch between #6...
Forum: Cooling
06-04-2012, 07:41 PM
Replies: 14
Views: 2,173
Posted By m smith

Re: Driver's side fan turns on when ignition on

You`re welcome.Don`t know if you are the first owner of the car or not but it is possible someone rigged the fan to purposely come on when the car is turned on.That would be done by purposely...
Forum: Cooling
06-04-2012, 05:12 PM
Replies: 4
Views: 609
Posted By m smith

Re: Fan Plan

Secondary fan turns on.The switch has been changed 3 times and still nothing.Maybe the cheap connecter that keeps on melting loses contact with the switch.
Forum: Cooling
06-04-2012, 05:08 PM
Replies: 14
Views: 2,173
Posted By m smith

Re: Driver's side fan turns on when ignition on

The primary fan(drivers side) is controlled by the ECM to come on when the coolant temp sensor sends a signal to the computer indicating a temp of 223 degrees F (106 C) or higher.The secondary fan is...
Forum: Cooling
06-04-2012, 07:35 AM
Replies: 14
Views: 2,173
Posted By m smith

Re: Driver's side fan turns on when ignition on

If the coolant temp sensor fails the primary fan will come on so unplugging may not show anything.It is possible that the sensor has shifted out of calibration telling the the computer it`s over 106...
Forum: Cooling
05-31-2012, 07:10 PM
Replies: 4
Views: 609
Posted By m smith

fans run manually not automatically

I have a 1988 Iroc 5.7 with dual cooling fans.I have both green/white wires rigged up to separate toggle switches to turn on one fan or both fans.Why do the fans not come on automatically?I have...
Forum: Brakes
09-28-2011, 07:47 PM
Replies: 3
Views: 508
Posted By m smith

brake swap question

Can you swap the disc brakes off a 9-bolt onto a ten bolt with drum brakes directly.Thanks for any replies.
Forum: Cooling
07-14-2011, 10:42 PM
Replies: 2
Views: 659
Posted By m smith

Re: cooling fans still not working

1988 iroc 5.7L with dual cooling fans.I disconnected the relay and grounded the green white wire at the connector then disconnected the harness at the computer then hooked up a test light to power...
Forum: Cooling
07-14-2011, 08:33 PM
Replies: 2
Views: 659
Posted By m smith

cooling fans still not working

I have ran every test I can think of and every thing checks out.I even checked the wires from the ecm to the relays and everything looks fine.I even replaced the ecm and still no fans.Put a scanner...
Forum: Cooling
05-04-2011, 09:12 PM
Replies: 1
Views: 578
Posted By m smith

coolant fan problem not fixed

I have dual coolant fans and neither one comes on.Did every test in the GM shop manual and everything checks out but still no fans.Put in a 212 degree fan switch and still no secondary fan.Put in new...
Forum: Brakes
04-11-2011, 07:40 AM
Replies: 5
Views: 902
Posted By m smith

Re: Re cheap prop valve modification

The rears are disc brakes.I put new calipers and pads on and had the discs machined.Parking brake should be set correctly as it will hold the car from moving in my driveway with is sloped.There is...
Forum: Brakes
04-10-2011, 02:48 PM
Replies: 5
Views: 902
Posted By m smith

Re cheap prop valve modification

The rear brakes on my Iroc do next to nothing like alot of other peoples third gens.I read of the mod by installing a stronger spring in the valve to put more pressure to the rears.Wouldn`t that...
Forum: Cooling
04-04-2011, 07:33 AM
Replies: 13
Views: 893
Posted By m smith

Re: coolant fan puzzle

If I had one I would aim it as close as possible to the temp sender in the head or where the CTS screws in.It may not give an exact reading but it may give an indiction how far out of whack the gauge...
Forum: Cooling
04-03-2011, 07:54 PM
Replies: 13
Views: 893
Posted By m smith

Re: coolant fan puzzle

That is probably what it is.I got a gauge from a wreckers removed the old one and installed the one from the wreckers and it read exactly the same.In the red and no fans.What you suggest is more than...
Forum: Cooling
03-26-2011, 10:02 AM
Replies: 13
Views: 893
Posted By m smith

Re: coolant fan puzzle

I jumpered the high pressure switch(black and gray wires) and the secondary fan came on.The A/C does not work though.All the tests seemed to check out OK so it seems either the primary is not coming...
Forum: Cooling
03-25-2011, 08:32 PM
Replies: 13
Views: 893
Posted By m smith

coolant fan puzzle

I have an 88 Iroc with dual coolant fans.I have ran every test in the GM factory service manual and everything checks out but when the car is actually running the gauge is in the red and neither fan...
Forum: Cooling
03-18-2011, 07:09 PM
Replies: 1
Views: 598
Posted By m smith

coolant fan shorted?

I have a 1988 Iroc with dual coolant fans.Neither of them turn on.If I jumper the orange wire to the black-red wire on either relay with the relays disconnected I get a spark.In reality by doing this...
Forum: Cooling
03-08-2011, 06:56 PM
Replies: 2
Views: 669
Posted By m smith

temperature sender malfunction?

I have an 88 Iroc with dual coolant fans.The temp gauge is in the red and the fans do not come on.If I ground the ALDL with the key on the primary fan comes on.If I unground the ALDL, turn on the key...
Forum: Cooling
01-26-2011, 08:46 PM
Replies: 5
Views: 783
Posted By m smith

coolant fan confusion

I have an 88 Iroc with dual coolant fans.When I ground the aldl the primary coolant fan comes on with the key in the run position.Is this correct?My factory service manual says if this happens check...
Forum: Cooling
01-21-2011, 05:03 PM
Replies: 2
Views: 911
Posted By m smith

Re: coolant fan and ALDL

Thanks for the info.I have a test lamp and DVM so I will check it out.I might even replace the sender to the gauge.It`s possible the sender is toast and the engine is not as hot as the gauge says.
Forum: Cooling
01-20-2011, 03:31 PM
Replies: 2
Views: 911
Posted By m smith

coolant fan and ALDL

I have a 1988 Iroc 5.7L. When I ground the ALDL both coolant fans come on.I thought only the primary ecm controlled fan was supposed to turn on.I also installed a 212 degree fan switch for the...
Forum: Transmissions and Drivetrain
07-11-2010, 04:32 PM
Replies: 2
Views: 1,266
Posted By m smith

9 bolt lubricant

Does anyone know what is the proper gear lube for Borg Warner 9 bolt rear ends.Can you use 80-90w oil.I know it is a cone type LSD so I would assume you do not need an additive to quiet the clutches...
Forum: Cooling
05-02-2010, 12:46 PM
Replies: 1
Views: 841
Posted By m smith

primary coolant fan problem

I have a 1988 Iroc 5.7L with dual cooling fans.The problem is both fans turn on at the same time.The primary fan never goes on by itself when the temp hits 223 degrees like the factory manual...
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