Lt1 Fiero Owners. (Page 1/16)
str8maxn AUG 16, 04:32 PM
Hello All a few questions,

It appears my LT1 ( from 1993 Vette) has an intake manifold leak. How hard would it be to do this work myself; on a scale of 1 -10 . Ten being very hard.
Any qotches?

How about changing spark plugs doable with the engine in the car?


Also, can someone tell me how hot the LT1 runs?

Thank you all for the feed back.

[This message has been edited by str8maxn (edited 08-16-2021).]

mafv8 AUG 16, 05:17 PM

quote
Originally posted by str8maxn:

Hello All a few questions,

It appears my LT1 ( from 1993 Vette) has an intake manifold leak. How hard would it be to do this work myself; on a scale of 1 -10 . Ten being very hard.
Any qotches?

How about changing spark plugs doable with the engine in the car?


Also, can someone tell me how hot the LT1 runs?

Thank you all for the feed back.




I have a non LT1 SBC in mine, changing plugs is easy from under the car, the front bank is harder, especially the one behind the alternator, due to access, but is doable. Mine runs about 180 degrees, with an electric water pump and a Champion Aluminum radiator, I also have a thermostatically controlled engine oil cooler. Not sure how complex the LT1 intake is, but it should all be acessable from the top, I have swapped manifolds on mine before, just keep track of all the parts/fasteners. And take pictures before you disassemble!

------------------
84SE, aero body, 4 speed and an injected 355 V8

[This message has been edited by mafv8 (edited 08-16-2021).]

str8maxn AUG 16, 05:41 PM
That engine bay is stunning.. Very nice.

My temp hit 240 degrees ; I take it this is high.

Stock fiero radiator and stock LT1 water pump.

JM
Steel AUG 17, 06:37 AM
Maybe there's a member in your area with experience who can lend a hand and or just do it for you? It's not hard at all, very basic. But if you aren't sure of yourself and the fact you're even asking I'd hate to see you have issues.

There's some videos on youtube, no doubt, of intake/gasket replacements which are likely harder to access in F-body vehicles than in your Fiero. I'd take a peek at those and see if it's something you can handle.

[This message has been edited by Steel (edited 08-17-2021).]

str8maxn AUG 17, 10:51 AM

quote
Originally posted by Steel:

Maybe there's a member in your area with experience who can lend a hand and or just do it for you? It's not hard at all, very basic. But if you aren't sure of yourself and the fact you're even asking I'd hate to see you have issues.

There's some videos on youtube, no doubt, of intake/gasket replacements which are likely harder to access in F-body vehicles than in your Fiero. I'd take a peek at those and see if it's something you can handle.




I did check a few videos out. It seems straight forward. Just need to keep track of all the things I disconnect.
cyrus88 AUG 17, 02:46 PM
It's a piece of cake to change intake gasket and spark plugs, so a 1.

With the stock water pump my 97 LT-1 ran pretty hot, but when I switched over to remote electric water pump, it runs about 180-190F while driving, and 220F when idling for a while but goes down immediately to 180-190F when the radiator fan kicks on.
str8maxn AUG 17, 02:59 PM
Great to hear... that it's easy...

Any recommendations for Electric water pumps and radiator recommendations?
La fiera AUG 17, 03:58 PM
What PSI is your radiator cap rated at?
str8maxn AUG 17, 04:41 PM

quote
Originally posted by La fiera:

What PSI is your radiator cap rated at?



Both are rated at 18 PSI.. The one on the radiator and the one at the rear tank .
cyrus88 AUG 17, 05:26 PM

quote
Originally posted by str8maxn:

Any recommendations for Electric water pumps and radiator recommendations?



Shop around and see what you feel comfortable with. I have a CSR 35gpm unit, with a Champion 3-core radiator, and stock fiero fan.

Edit: pump is 35gph not gpm

[This message has been edited by cyrus88 (edited 08-24-2021).]