timing chain/dowel pin question

ols0051 · 03-27-2005, 01:27 PM

I have a comp double roller chain and a trickflow stage2 cam in a 92 block. The question is on the dowel pin. Comps instructions say to use the short dowel pin. If that is the case, it just barely enters the hole in the cam and it is a super tight fit. Is this right? I'm concerned that with just a nub of the pin in the cam It won't hold. Thanks.

Gearhead999 · 03-27-2005, 01:44 PM

I would be concerned too. Why don't you call their tech line and get a reading on that.

I've always used a long dowel and cut it to length, if necessary.

ols0051 · 03-27-2005, 01:54 PM

I better do that, and call. I can't figure out why they would want to use the short one, when the long one looks like it would work perfect. They say on 85 and later engines use the short pin.

Gearhead999 · 03-27-2005, 03:12 PM

Good posibility that they use the shorter pin on 85 and newer because of the FI. Before, the mechanical fuel pump was driven by an ecentric on the front of the cam gear that the pin also passed through to drive/hold it off center.

Rev · 03-27-2005, 08:30 PM

I would just use the one that fits the best. All the way into the cam and is even with or sticks out a little on the cam sprocket. I did leave the mechanical eccentric in on mine ('66), so if anyone ever wanted to use a mechanical fuel pump, they still could. If the long pin is not so long as to hit the timing chain cover, I don't see a problem with the longer pin.

Rev

ols0051 · 03-29-2005, 11:42 PM

I think I will go with the long pin. Called comp cams and didn't get much info. The short pin only goes thru the gear and into the cam about a 1/8th inch. Just doesn't seem right.

03-27-2005, 01:27 PM	#1
ols0051 Registered Member Join Date: Sep 2002 Location: cent.wis Posts: 203	timing chain/dowel pin question I have a comp double roller chain and a trickflow stage2 cam in a 92 block. The question is on the dowel pin. Comps instructions say to use the short dowel pin. If that is the case, it just barely enters the hole in the cam and it is a super tight fit. Is this right? I'm concerned that with just a nub of the pin in the cam It won't hold. Thanks.

03-27-2005, 01:44 PM	#2
Gearhead999 Registered Member Join Date: Sep 1998 Location: Oviedo, FL Posts: 992	Re: timing chain/dowel pin question I would be concerned too. Why don't you call their tech line and get a reading on that. I've always used a long dowel and cut it to length, if necessary. __________________ "Support our Troops" Dave 1968 Cougar 2004 Thunderbird 2007 F150 Harley-Davidson, SuperCrew 1986 LTD 1997 Ranger 1992 Honda Civic

03-27-2005, 01:54 PM	#3
ols0051 Registered Member Join Date: Sep 2002 Location: cent.wis Posts: 203	Re: timing chain/dowel pin question I better do that, and call. I can't figure out why they would want to use the short one, when the long one looks like it would work perfect. They say on 85 and later engines use the short pin.

03-27-2005, 03:12 PM	#4
Gearhead999 Registered Member Join Date: Sep 1998 Location: Oviedo, FL Posts: 992	Re: timing chain/dowel pin question Good posibility that they use the shorter pin on 85 and newer because of the FI. Before, the mechanical fuel pump was driven by an ecentric on the front of the cam gear that the pin also passed through to drive/hold it off center. __________________ "Support our Troops" Dave 1968 Cougar 2004 Thunderbird 2007 F150 Harley-Davidson, SuperCrew 1986 LTD 1997 Ranger 1992 Honda Civic

03-27-2005, 08:30 PM	#5
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Re: timing chain/dowel pin question I would just use the one that fits the best. All the way into the cam and is even with or sticks out a little on the cam sprocket. I did leave the mechanical eccentric in on mine ('66), so if anyone ever wanted to use a mechanical fuel pump, they still could. If the long pin is not so long as to hit the timing chain cover, I don't see a problem with the longer pin. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

03-29-2005, 11:42 PM	#6
ols0051 Registered Member Join Date: Sep 2002 Location: cent.wis Posts: 203	Re: timing chain/dowel pin question I think I will go with the long pin. Called comp cams and didn't get much info. The short pin only goes thru the gear and into the cam about a 1/8th inch. Just doesn't seem right.

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