ZF DRAIN/FILL PLUG SIZE - ZR-1 Net Registry Forums

Horrido · 07-17-2009

Okay, I give, what is the HEX size for the DRAIN/FILL PLUGS. Is it 16MM?

Thanks

Marshall

Kb7tif · 07-17-2009

17 I think

Horrido · 07-17-2009

Thanks bud. You are right...the fill is 17mm. However, the drain looks as if it is a 16mm. 17mm HEX drive slightly larger. Go figure!!

flyin ryan · 07-18-2009

Same plug for drain & fill. 17mm is the one

Horrido · 07-18-2009

OK. I will try again. But it is strange that the 17mm drive seats with no problem in the fill plug, but seems slightly over size for the drain plug. Maybe a slight grinding on the drive surfaces will make it seat in. Don't want to damage plug. If worse case, will just extract oil from fill and refill. thanks for all the help. What I am doing is installing a RON DAVIS radiator. C4's are notorious for over heating. GM should be ashamed of themselves to put that small of a radiator in the ZR-1. Ron Davis rad is 5/8 inch thicker and is all aluminum. Very nice radiator. The only mods I did was lowering it 1 inch, 3:73 rearend (Dick Gulstrand), Corsa exhaust and a modified EPROM. Programed out the power key, 1st to 4th and changed the spark and a K&N filter with the top of the air box cut out.

Thanks again.

Marshall

1991 ZR-1, Black/Black. (1400)

flyin ryan · 07-18-2009

Hhmmm

. Should fit without much trouble...I wonder if somebody before you messed up the factory plug & just did what they could at the with a non-factory/correct plug? Does it look 'Exactly' the same as the fill plug? It should.

07-18-2009

Or somebody has been jumping curbs and garfed up the drain plug.

flyin ryan · 07-18-2009

Quote:

Originally Posted by Jeffvette

Or somebody has been jumping curbs and garfed up the drain plug.

You been driving his car Jeff

,

.

07-18-2009

I only hit curbing at the track. Damn lucky it didn't crack the pan when I spun.

Horrido · 07-22-2009

Flyin Ryan, you are right. After looking at this plug for several minutes and running my finger around the lip, I suspected that the drain plug was damaged. I used my dremel very so lightly around the edges and inside of the plug, and kept fitting the 1/2 17mm hex drive into the plug. Finally it went in. After removing and inspected, I found that the plug had been damaged by some AH using improper tool or tools and had peened the edges over enough to disallow a 17mm to fit. I knew that a 17mm was needed to remove the fill and drain plugs, that's what threw me when I couldn't get the 17mm in the drain plug. At my angel it was difficult to get a straight on view.

Anyway, thank you all that commented.

Marshall

07-17-2009	#1
Horrido Join Date: Jul 2005 Location: Southern California Posts: 6	ZF DRAIN/FILL PLUG SIZE Okay, I give, what is the HEX size for the DRAIN/FILL PLUGS. Is it 16MM? Thanks Marshall

07-17-2009	#2
Kb7tif Join Date: May 2009 Location: S Nevada Posts: 352	Re: ZF DRAIN/FILL PLUG SIZE 17 I think __________________ 1995 Convertible Supercharged Auto 1974 454 550hp (avatar car) On the blocks- -Scharger install ! 1992-Zr-1 Sold. Watson Headers Ported Plenum, Housings Random tech cats Fidanza Flywheel Chipped, Relocated Mat Woods 165 stat Borlas, Straights 1996 Lt4 Sold 1994 Lt1 Sold 2004 Z06 Sold AKA** Illenema

07-17-2009	#3
Horrido Join Date: Jul 2005 Location: Southern California Posts: 6	Re: ZF DRAIN/FILL PLUG SIZE Thanks bud. You are right...the fill is 17mm. However, the drain looks as if it is a 16mm. 17mm HEX drive slightly larger. Go figure!!

07-18-2009	#4
flyin ryan Join Date: Aug 2006 Location: Edmonton, Alberta or Phoenix, Arizona Posts: 2,741	Re: ZF DRAIN/FILL PLUG SIZE Same plug for drain & fill. 17mm is the one __________________ There are no limit's mans ingenuity, just as mans ingenuity will never conquer the forces & behavior of this planet...Smokey Y.

07-18-2009	#5
Horrido Join Date: Jul 2005 Location: Southern California Posts: 6	Re: ZF DRAIN/FILL PLUG SIZE OK. I will try again. But it is strange that the 17mm drive seats with no problem in the fill plug, but seems slightly over size for the drain plug. Maybe a slight grinding on the drive surfaces will make it seat in. Don't want to damage plug. If worse case, will just extract oil from fill and refill. thanks for all the help. What I am doing is installing a RON DAVIS radiator. C4's are notorious for over heating. GM should be ashamed of themselves to put that small of a radiator in the ZR-1. Ron Davis rad is 5/8 inch thicker and is all aluminum. Very nice radiator. The only mods I did was lowering it 1 inch, 3:73 rearend (Dick Gulstrand), Corsa exhaust and a modified EPROM. Programed out the power key, 1st to 4th and changed the spark and a K&N filter with the top of the air box cut out. Thanks again. Marshall 1991 ZR-1, Black/Black. (1400)

07-18-2009	#6
flyin ryan Join Date: Aug 2006 Location: Edmonton, Alberta or Phoenix, Arizona Posts: 2,741	Re: ZF DRAIN/FILL PLUG SIZE Hhmmm . Should fit without much trouble...I wonder if somebody before you messed up the factory plug & just did what they could at the with a non-factory/correct plug? Does it look 'Exactly' the same as the fill plug? It should. __________________ There are no limit's mans ingenuity, just as mans ingenuity will never conquer the forces & behavior of this planet...Smokey Y.

07-18-2009	#7
Jeffvette Guest Posts: n/a	Re: ZF DRAIN/FILL PLUG SIZE Or somebody has been jumping curbs and garfed up the drain plug.

07-18-2009	#9
Jeffvette Guest Posts: n/a	Re: ZF DRAIN/FILL PLUG SIZE I only hit curbing at the track. Damn lucky it didn't crack the pan when I spun.

07-22-2009	#10
Horrido Join Date: Jul 2005 Location: Southern California Posts: 6	Re: ZF DRAIN/FILL PLUG SIZE Flyin Ryan, you are right. After looking at this plug for several minutes and running my finger around the lip, I suspected that the drain plug was damaged. I used my dremel very so lightly around the edges and inside of the plug, and kept fitting the 1/2 17mm hex drive into the plug. Finally it went in. After removing and inspected, I found that the plug had been damaged by some AH using improper tool or tools and had peened the edges over enough to disallow a 17mm to fit. I knew that a 17mm was needed to remove the fill and drain plugs, that's what threw me when I couldn't get the 17mm in the drain plug. At my angel it was difficult to get a straight on view. Anyway, thank you all that commented. Marshall