Trouble sourcing PCV Grommets - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Lippyp · 09-12-2008, 08:26 AM

I have a set of Micky Thomson valve covers to go on my 350 but I'm having real trouble over here in the UK sourcing the right size PCV grommet. The hole (already knocked out) in the cover measures at a diameter of 1 3/8" and I'm struggling to find one that size. Can anyone suggest a mail order source.

Thanks

Brad · 09-12-2008, 09:12 AM

That seems like a pretty big hole for the PCV, are you sure it's not for the breather cap instead?

Lippyp · 09-12-2008, 09:35 AM

It has a push and twist hole at one end and this 1 3/8 hole at the other. One cover has the 1 3/8" hole opened up and the other the push and twist so I was going to put the breather/oil filler in the push and twist hole and the PCV in the other. I'll take some pics if that would help.

Brad · 09-12-2008, 07:42 PM

Yes, pics would help.

nyncompute · 09-12-2008, 07:57 PM

I recently replaced all my grommets ..had a oil fill, a carb spacer/breather, and a pvc. Got them all at Carquest. They had a bunch of em on a rotating display. Hope thats not to obvious a source. Good luck

Sinister · 09-12-2008, 08:28 PM

Quote:

Originally Posted by nyncompute

I recently replaced all my grommets ..had a oil fill, a carb spacer/breather, and a pvc. Got them all at Carquest. They had a bunch of em on a rotating display. Hope thats not to obvious a source. Good luck

I think the OP is in England.

Lippyp · 09-13-2008, 08:13 AM

Yep, good old England where it never stops raining.........hence the request for mail order. Suppliers over here only seem to keep 1 1/4 ones in stock.

inside

zeeklu · 09-13-2008, 10:27 AM

I would try the 1 1/4" grommet.I think the hole in my Clifford valve cover was 1 3/8" and 1 1/4" worked fine. Chris

Lippyp · 09-13-2008, 11:19 AM

I've just looked at the other cover that has the opposite holes knocked out and it looks like the PCV hole is stepped so you can just knock out the middle or the whole, well, hole and the previous owner knocked the large hole out. A 1 1/4" grommet does stay in but it is a little loose, I was thinking maybe a small bead of black TRV sealant around it might be the only way forward to avoid any oil leaks.

ratrod67 · 09-13-2008, 12:27 PM

Maybe something like this?

http://store.summitracing.com/partde...0&autoview=sku

neonlarry · 09-13-2008, 02:25 PM

I found these:
https://www.yearone.com/serverfiles/...T66803&Style=4
But if you want some advice 'sell them' and get something else. Or at the very least put some baffles inside to stop oil from slinging out the holes. I had some and could never keep them from leaking, finally sold them.

**Boog** · 09-13-2008, 04:58 PM

Lippy it looks like Year One has you covered with either size grommets for steel or aluminum valve covers.
A bead of silicone to try what you have or have someone do a little bit of welding on your cover to tighten up the hole maybe?

09-12-2008, 08:26 AM	#1
Lippyp English Chevy Owner Join Date: May 2002 Location: Shropshire, UK/ Lot, France Posts: 1,848	Trouble sourcing PCV Grommets I have a set of Micky Thomson valve covers to go on my 350 but I'm having real trouble over here in the UK sourcing the right size PCV grommet. The hole (already knocked out) in the cover measures at a diameter of 1 3/8" and I'm struggling to find one that size. Can anyone suggest a mail order source. Thanks __________________ Phil '67 C10 long fleet. 350/TH350, 4 bbl Carter, K&N, Dual exhaust, loads of stuff coming soon 2001 S10 Blazer Daily Driver, bone stock 4 door 4x4 with manual transmission

09-12-2008, 09:12 AM	#2
Brad Out of the carpool lane. Join Date: Jan 2000 Location: Clark Co, WA Posts: 5,673	Re: Trouble sourcing PCV Grommets That seems like a pretty big hole for the PCV, are you sure it's not for the breather cap instead? __________________ 1968 C-10 SWB, 5.7 Vortec/700R4/3.73 posi, Torch Red 1968 Camaro, 250/Powerglide, all original (No, I'm not gonna drop a 350 in it!...Jeez!) 2000 Honda VFR in the faster yellow! 2008 Husqvarna TE-610 1967 C-10 SWB 'Six Appeal'-Gone but not forgotten...

09-12-2008, 09:35 AM	#3
Lippyp English Chevy Owner Join Date: May 2002 Location: Shropshire, UK/ Lot, France Posts: 1,848	Re: Trouble sourcing PCV Grommets It has a push and twist hole at one end and this 1 3/8 hole at the other. One cover has the 1 3/8" hole opened up and the other the push and twist so I was going to put the breather/oil filler in the push and twist hole and the PCV in the other. I'll take some pics if that would help. __________________ Phil '67 C10 long fleet. 350/TH350, 4 bbl Carter, K&N, Dual exhaust, loads of stuff coming soon 2001 S10 Blazer Daily Driver, bone stock 4 door 4x4 with manual transmission

09-12-2008, 07:42 PM	#4
Brad Out of the carpool lane. Join Date: Jan 2000 Location: Clark Co, WA Posts: 5,673	Re: Trouble sourcing PCV Grommets Yes, pics would help. __________________ 1968 C-10 SWB, 5.7 Vortec/700R4/3.73 posi, Torch Red 1968 Camaro, 250/Powerglide, all original (No, I'm not gonna drop a 350 in it!...Jeez!) 2000 Honda VFR in the faster yellow! 2008 Husqvarna TE-610 1967 C-10 SWB 'Six Appeal'-Gone but not forgotten...

09-12-2008, 07:57 PM	#5
nyncompute Registered User Join Date: Nov 2004 Location: Southern Nevada Posts: 532	Re: Trouble sourcing PCV Grommets I recently replaced all my grommets ..had a oil fill, a carb spacer/breather, and a pvc. Got them all at Carquest. They had a bunch of em on a rotating display. Hope thats not to obvious a source. Good luck __________________ 1972 K-10 SWB Cheyenne

09-13-2008, 08:13 AM	#7
Lippyp English Chevy Owner Join Date: May 2002 Location: Shropshire, UK/ Lot, France Posts: 1,848	Re: Trouble sourcing PCV Grommets Yep, good old England where it never stops raining.........hence the request for mail order. Suppliers over here only seem to keep 1 1/4 ones in stock. inside __________________ Phil '67 C10 long fleet. 350/TH350, 4 bbl Carter, K&N, Dual exhaust, loads of stuff coming soon 2001 S10 Blazer Daily Driver, bone stock 4 door 4x4 with manual transmission Last edited by Lippyp; 09-13-2008 at 10:05 AM.

09-13-2008, 10:27 AM	#8
zeeklu Registered User Join Date: Dec 1999 Location: Northwest NJ Posts: 746	Re: Trouble sourcing PCV Grommets I would try the 1 1/4" grommet.I think the hole in my Clifford valve cover was 1 3/8" and 1 1/4" worked fine. Chris

09-13-2008, 11:19 AM	#9
Lippyp English Chevy Owner Join Date: May 2002 Location: Shropshire, UK/ Lot, France Posts: 1,848	Re: Trouble sourcing PCV Grommets I've just looked at the other cover that has the opposite holes knocked out and it looks like the PCV hole is stepped so you can just knock out the middle or the whole, well, hole and the previous owner knocked the large hole out. A 1 1/4" grommet does stay in but it is a little loose, I was thinking maybe a small bead of black TRV sealant around it might be the only way forward to avoid any oil leaks. __________________ Phil '67 C10 long fleet. 350/TH350, 4 bbl Carter, K&N, Dual exhaust, loads of stuff coming soon 2001 S10 Blazer Daily Driver, bone stock 4 door 4x4 with manual transmission

09-13-2008, 12:27 PM	#10
ratrod67 Registered User Join Date: Sep 2002 Location: DFW Texas Posts: 2,270	Re: Trouble sourcing PCV Grommets Maybe something like this? http://store.summitracing.com/partde...0&autoview=sku

09-13-2008, 02:25 PM	#11
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,746	Re: Trouble sourcing PCV Grommets I found these: https://www.yearone.com/serverfiles/...T66803&Style=4 But if you want some advice 'sell them' and get something else. Or at the very least put some baffles inside to stop oil from slinging out the holes. I had some and could never keep them from leaking, finally sold them. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

09-13-2008, 04:58 PM	#12
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,130	Re: Trouble sourcing PCV Grommets Lippy it looks like Year One has you covered with either size grommets for steel or aluminum valve covers. A bead of silicone to try what you have or have someone do a little bit of welding on your cover to tighten up the hole maybe? __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross



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