Calling all 807/841/843 Engine Enthusiasts

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marbroman

Member
Fellow Frogger
Joined
Apr 14, 2013
Messages
33
Location
Calgary, Alberta, Canada
Could anyone direct me to anyone that actually has the timing chain anti-flail guides Renault p/n 08 30 056 000 in stock or NOS.

I have tried all sources abroad (UK & France) as well as Alpine parts suppliers (MECA, GBS, etc.) and Lotus Europa suppliers too. Noluck.Eveyone says NLA.

No one seems to have any of these as new parts or NOS.


I have plenty of used ones, but am reluctant to re-use them as the rubber is rock hard.

I have 1 brand new timing chain guide and the rubber is supple, so I know that is the way it should be.

Any help would be greatly appreciated. Also, there is a special tool used to set the clearance between the timing chain and the guides.If anyone has the tool, or alternatively if anyone knows of a method for setting the correct clearance I would appreciate any advice.

Best regards,

marbroman
 
marbroman said:
Could anyone direct me to anyone that actually has the timing chain anti-flail guides Renault p/n 08 30 056 000 in stock or NOS.

I have tried all sources abroad (UK & France) as well as Alpine parts suppliers (MECA, GBS, etc.) and Lotus Europa suppliers too. Noluck.Eveyone says NLA.

No one seems to have any of these as new parts or NOS.


I have plenty of used ones, but am reluctant to re-use them as the rubber is rock hard.

I have 1 brand new timing chain guide and the rubber is supple, so I know that is the way it should be.

Any help would be greatly appreciated. Also, there is a special tool used to set the clearance between the timing chain and the guides.If anyone has the tool, or alternatively if anyone knows of a method for setting the correct clearance I would appreciate any advice.

Best regards,

marbroman
Click to expand...

Hi Marbroman

Thats ashame that those guides are no longer available, I have always reused. The only suggestion I have is to take the new guide you have as a sample and several old guides to a rubber company and see if they could bond a suitable rubber to the old guides.

The setting up of the guides is done using factory tool Mot.420. As I don't have this special tool what I have done in the past is either use piece of flat steel 0.8mm (0.032" in your money) thick or a feeler gauge.
 
I wouldn't trust re-covering those guides with new rubber. I have a NOS set here, and the rubber is hard, not soft. I have no idea if that is because of age, but all the used sets I have are just as hard. Keep in mind this is not supposed to have give in it, it is supposed to let the chain slip past without any friction. Other cars use plastic guides (BMW M10 engines) and they are just as hard, not sure what the plastic is. Same for the tensioner.

The NOS set I have came from France, picked it up off ebay.fr with a lot of patience.

I wouldn't hesitate to reuse old guides if they're not too shabby (if they lasted this long, they're good enough).
 
Last edited:
Thought I got you some guides, years ago?

Have never seen "soft rubber" on any car.
 
driven said:
Never seen a "SOFT" timing chain guide

Best material is Murtdfelt

Can be machined to any shape

Chain tensioners for roller chains / Murtfeldt - Performance in plastics.
Click to expand...

addo said:
Thought I got you some guides, years ago?

Have never seen "soft rubber" on any car.
Click to expand...

Just been out in the shed and looked at a set of guide that I have out there. They are definitely not rubber but some form of black phenolic compound. So something live Driven has suggested my be the go.
 
Thanks to all who responded to my request.

By "supple" I did not mean to suggest that the rubber on my NOS timing chain guide (brand new still in the Renault Genuine Parts bag) was SOFT. What I meant to describe is that the new one has some give to the rubber (you can dent it with your thumbnail for instance), whereas the used ones I have are definitelyrock hard and the rubber has absolutely no give at all.

Perhaps the NOS part I have was manufactured a decade or two ago and is still relatively fresh compared to some new old stock that was manufactured 40 years ago. One of the chaps responded that his NOS guides were hard rubber and he was not sure if that was down to age...I suspect so since my NOS guide is clearly somewhat "supple".

Anyways, I agree with the suggestion NOT to try to 'retread' the old guides as vulcanizing new rubber and expecting a good bond is frought with all sorts of difficulties, not the least trying to build a mold and getting the rubber formulation correct.

I will probably just use the one good NOS guide I have and pick the best used one (out of 6 that I have) that has the least 'rock hardness' to it.

If anyone knows of anyone on the planet that can get new timing chain guides (surely some of the Gordini/ Alpine specialists have a few of these lying around) or if any of your suppliers over on that side of the pond has a few of these, I could use 3 more as I am rebuilding 2 complete 841-10 engines.

Best regards,

marbroman
 
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