Intake Duct Alignment? - ZR-1 Net Registry Forums

C4CAMS · 07-17-2018

Forgive me if I'm using incorrect terminology:

I'm looking at a '90 with 83k miles. There is a noticeable misalignment between the engine intake and the plastic air filter ductwork, as shown by the S-bend in the flexible duct just ahead of the engine intake. Every other LT-5 I've seen looks well aligned in this respect. This caught my eye and the owner has no explanation. Injectors have been replaced. The plastic parts looked to be mounted correctly above the radiator. The engine didn't seem to be out of position (I looked down past the valve covers on both sides) and it drove well. I thought maybe an engine mount might be worn, but that is usually a noticeable problem while driving.

Anyone else seen this? Should I be concerned?

efnfast · 07-17-2018

I would be concerned

Vette73 · 07-17-2018

Check the easy things first.....Remove duct, make sure its not damaged or warped..Make sure its straight......Remove air filter housing, check alignment holes, maybe somebody retapped them? Put everything back straight if possible.....I have never seen that..

Dynomite · 07-17-2018

Quote:

Originally Posted by efnfast

I would be concerned

Concur......it seems looking at the stencils on the radiator cover.....they are in line correctly with the air filter housing. Either the whole radiator is shifted or the engine is rotated or moved to drivers side. That is definitely not correct alignment.

G8nightman · 07-17-2018

I seen that on a car that was in a accident before

onethumb · 07-17-2018

I'd want to get that up on a lift and look underneath for damage.

If the seller is not trying to hide something, they should be agreeable to a pre-purchase inspection by a mechanic of your choice. Might be the best $150 you ever spend.

efnfast · 07-18-2018

Oh, and welcome to the forum.

onetinsoldier · 08-01-2018

Check inside the drivers door near the hinges , if theres a vin plate there , it may be a rebuilt car . Check the title to see if its a salvaged car .

Karl · 08-01-2018

The engine looks like it is tilted on the driver's side. If not a bad motor mount or simple fix I would pass that car up.

Easy way to check is measure the height from the rear of the plenum with the weather stripping on the windshield.

Good luck.

Ccmano · 08-01-2018

The engine is sitting low in the back too. My money is on engine mounts. A very common issue. This one bad though. I have speculated that most cars that have not yet replaced the mounts are actually driving around on broken mounts.
H

07-17-2018	#2
efnfast Join Date: Nov 2011 Location: Dunbarton NH Posts: 7,368	Re: Intake Duct Alignment? I would be concerned

07-17-2018	#3
Vette73 Join Date: Nov 2014 Location: Brooklyn ny Posts: 1,045	Re: Intake Duct Alignment? Check the easy things first.....Remove duct, make sure its not damaged or warped..Make sure its straight......Remove air filter housing, check alignment holes, maybe somebody retapped them? Put everything back straight if possible.....I have never seen that..

07-17-2018	#5
G8nightman Join Date: Dec 2007 Location: NYC Posts: 1,186	Re: Intake Duct Alignment? I seen that on a car that was in a accident before __________________ 90 Chevy ZR1 LPE #2315 'SOLD' 90 Chevy ZR1 LPE #2774 'SOLD' 91 Chevy ZR1 Callaway aerobody 91 Chevy ZR1 #1512 91 Chevy ZR1 #951 95 Chevy ZR1 #338 'SOLD' 91 BMW 850i 94 BMW 850csi 95 BMW 850csi 94 Lotus Esprit S4 07 Benz CLS550 06 BMW M5 "SOLD"

07-17-2018	#6
onethumb Join Date: Jun 2018 Location: Scottsdale, AZ Posts: 36	Re: Intake Duct Alignment? I'd want to get that up on a lift and look underneath for damage. If the seller is not trying to hide something, they should be agreeable to a pre-purchase inspection by a mechanic of your choice. Might be the best $150 you ever spend. __________________ Stacy Faught - 1978 Alfa Romeo Alfetta, 1983 Alfa Romeo GTV6 (3.5L), 1991 Corvette ZR1, 2018 Alfa Romeo Giulia Quadrifoglio

07-18-2018	#7
efnfast Join Date: Nov 2011 Location: Dunbarton NH Posts: 7,368	Re: Intake Duct Alignment? Oh, and welcome to the forum.

08-01-2018	#8
onetinsoldier Join Date: Aug 2016 Location: Spring Hill, FL Posts: 127	Re: Intake Duct Alignment? Check inside the drivers door near the hinges , if theres a vin plate there , it may be a rebuilt car . Check the title to see if its a salvaged car .

08-01-2018	#9
Karl Join Date: May 2013 Location: Chicago Posts: 978	Re: Intake Duct Alignment? The engine looks like it is tilted on the driver's side. If not a bad motor mount or simple fix I would pass that car up. Easy way to check is measure the height from the rear of the plenum with the weather stripping on the windshield. Good luck. __________________ 1993 ZR-1 #211 Yellow On Beige Beast #2 1992 ZR-1 #427 Black On Black Sold 1985 L98 Blue On Blue Sold

08-01-2018	#10
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Intake Duct Alignment? The engine is sitting low in the back too. My money is on engine mounts. A very common issue. This one bad though. I have speculated that most cars that have not yet replaced the mounts are actually driving around on broken mounts. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.